European Journal of Mechanics A-Solids最新文献

英文中文

A modification of Holzapfel–Ogden hyperelastic model of myocardium better describing its passive mechanical behavior

IF 4.4 2区工程技术 Q1 MECHANICS

European Journal of Mechanics A-Solids

Pub Date : 2025-01-27 DOI: 10.1016/j.euromechsol.2025.105586

Jiří Vaverka, Jiří Burša

The passive mechanical behavior of the myocardium is usually mathematically described within the framework of hyperelasticity. One of the most popular models of this kind is that proposed by Holzapfel and Ogden in 2009. It is an orthotropic model formulated in terms of a reasonably selected set of scalar invariants representing different components of the myocardium. Several modifications of the model have emerged over the years. In this paper, we present another one which is characterized by an innovative approach to the modeling of myocardial “sheets”, i.e. lamellar collagenous structures that endow the myocardium with orthotropic mechanical properties. We describe their contribution by means of a less common scalar invariant which expresses the change of area of an oriented planar element (representing the plane of a sheet). To compare our formulation with the original model, we matched both of them to the biaxial tension and simple shear experimental data from the literature using a nonlinear least-squares optimization algorithm. The objective function for each model included both biaxial and simple shear data in order to obtain a single set of parameters for both deformation modes. The results show that our modified model can accurately describe both types of tests. The total residual is lowered by approximately 80% by our modification and

R^{2}

increases from 0.877 to 0.978 which demonstrates the significance of our modification on the quality of the fit.

{"title":"A modification of Holzapfel–Ogden hyperelastic model of myocardium better describing its passive mechanical behavior","authors":"Jiří Vaverka, Jiří Burša","doi":"10.1016/j.euromechsol.2025.105586","DOIUrl":"10.1016/j.euromechsol.2025.105586","url":null,"abstract":"<div><div>The passive mechanical behavior of the myocardium is usually mathematically described within the framework of hyperelasticity. One of the most popular models of this kind is that proposed by Holzapfel and Ogden in 2009. It is an orthotropic model formulated in terms of a reasonably selected set of scalar invariants representing different components of the myocardium. Several modifications of the model have emerged over the years. In this paper, we present another one which is characterized by an innovative approach to the modeling of myocardial “sheets”, i.e. lamellar collagenous structures that endow the myocardium with orthotropic mechanical properties. We describe their contribution by means of a less common scalar invariant which expresses the change of area of an oriented planar element (representing the plane of a sheet). To compare our formulation with the original model, we matched both of them to the biaxial tension and simple shear experimental data from the literature using a nonlinear least-squares optimization algorithm. The objective function for each model included both biaxial and simple shear data in order to obtain a single set of parameters for both deformation modes. The results show that our modified model can accurately describe both types of tests. The total residual is lowered by approximately 80% by our modification and <span><math><msup><mrow><mi>R</mi></mrow><mrow><mn>2</mn></mrow></msup></math></span> increases from 0.877 to 0.978 which demonstrates the significance of our modification on the quality of the fit.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"111 ","pages":"Article 105586"},"PeriodicalIF":4.4,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143136064","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Free vibration properties of novel sandwich plates with a layered and rotational core

IF 4.4 2区工程技术 Q1 MECHANICS

European Journal of Mechanics A-Solids

Pub Date : 2025-01-25 DOI: 10.1016/j.euromechsol.2025.105588

Youlong Wang , Yuxiang Cai , Kamal Hosen , Junwei Pan

The layered sandwich plate structure is widely used in various fields due to its lightweight and high-strength characteristics. To further enhance the functionality of these structures and expand their application areas, this study investigates the impact of an innovative method for adjusting the interlayer angle. This study adopts experimental analysis and numerical simulation methods, taking honeycomb core and grid core as examples, to explore the influence of interlayer angle on the first 9 natural frequencies and vibration modes of bilayer and tri-layer circular sandwich plates, and explain the mechanism of the influence of interlayer angle on the structural natural frequency through theoretical analysis. The results indicate that 1) at different angles, the natural frequencies of the same order vibration modes exhibit significant differences. For instance, in the case of the grid core, the minimum change rate of the natural frequency can exceed 10%, and the maximum can reach 16.68%; 2) compared to the unadjusted layered plates, which exhibit localized deformation in higher-order vibration modes, the stiffness distribution becomes more uniform after rotation, transforming the vibration modes into overall continuous deformations; 3) the proposed method allows for considerable changes in natural frequencies of various orders while maintaining stable structural mechanical properties without adding weight. This effectively avoids resonance with the working environment and promotes uniform stiffness distribution, making the structure suitable for use in more demanding stable environments.

{"title":"Free vibration properties of novel sandwich plates with a layered and rotational core","authors":"Youlong Wang , Yuxiang Cai , Kamal Hosen , Junwei Pan","doi":"10.1016/j.euromechsol.2025.105588","DOIUrl":"10.1016/j.euromechsol.2025.105588","url":null,"abstract":"<div><div>The layered sandwich plate structure is widely used in various fields due to its lightweight and high-strength characteristics. To further enhance the functionality of these structures and expand their application areas, this study investigates the impact of an innovative method for adjusting the interlayer angle. This study adopts experimental analysis and numerical simulation methods, taking honeycomb core and grid core as examples, to explore the influence of interlayer angle on the first 9 natural frequencies and vibration modes of bilayer and tri-layer circular sandwich plates, and explain the mechanism of the influence of interlayer angle on the structural natural frequency through theoretical analysis. The results indicate that 1) at different angles, the natural frequencies of the same order vibration modes exhibit significant differences. For instance, in the case of the grid core, the minimum change rate of the natural frequency can exceed 10%, and the maximum can reach 16.68%; 2) compared to the unadjusted layered plates, which exhibit localized deformation in higher-order vibration modes, the stiffness distribution becomes more uniform after rotation, transforming the vibration modes into overall continuous deformations; 3) the proposed method allows for considerable changes in natural frequencies of various orders while maintaining stable structural mechanical properties without adding weight. This effectively avoids resonance with the working environment and promotes uniform stiffness distribution, making the structure suitable for use in more demanding stable environments.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"111 ","pages":"Article 105588"},"PeriodicalIF":4.4,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143136045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A thermodynamically consistent wear modeling approach based on damage accumulation

IF 4.4 2区工程技术 Q1 MECHANICS

European Journal of Mechanics A-Solids

Pub Date : 2025-01-22 DOI: 10.1016/j.euromechsol.2025.105583

Quentin Caradec , Matthieu Breuzé , Claude Stolz , Habibou Maitournam

Due to the diversity of mechanisms involved, wear is very complex to model. Wear models are mostly empirical, and they sometimes fail to accurately predict wear evolution. In this paper, a damage-based wear modeling approach is developed in the framework of continuum thermodynamics. The model is physically consistent and aims at accounting for the progressive accumulation of near-surface degradation leading to material detachment. A thermodynamic driving force associated with wear is derived under the form of an energy release rate. Wear evolution is then driven by the accumulation of near-surface damage, and wear occurs when the surface damage value reaches a threshold. The damage evolution problem is treated using the thick level set approach, providing a non-local formulation for damage evolution. Numerical simulations are conducted on a fretting test case using the finite element method, and the results compared to those obtained with a classical friction energy wear law.

引用次数: 0

Plane strain problems for flexoelectric semiconductors

IF 4.4 2区工程技术 Q1 MECHANICS

European Journal of Mechanics A-Solids

Pub Date : 2025-01-22 DOI: 10.1016/j.euromechsol.2025.105573

Jinchen Xie , Xiaowen He

The flexoelectric effect, which is induced by strain gradients, is a pervasive phenomenon in dielectric and semiconductor materials. Flexoelectric semiconductors have considerable potential for application in the field of micro- and nanoelectronics, although their theoretical research is still in its infancy. In particular, there is a paucity of research on the exact solutions of the multiphysics field coupling problems for flexoelectric semiconductors. In light of these considerations, this paper presents the first comprehensive and rigorous investigation into the plane strain issues pertaining to flexoelectric semiconductors. The coupled governing equations for flexoelectric semiconductors under plane strain conditions are reformulated for decoupling purposes. On this basis, we derive the exact solutions to a series of plane-strain problems for flexoelectric semiconductors, including bending of beams, deformation of pressurized cylinders, cylindrical cavities, cylindrical inhomogeneities, and cylindrical inclusion problems with eigenstrain. By employing these exact solutions, we investigate the size effect of multiphysics field coupling in flexoelectric semiconductors and the influence of the initial doping concentration. Furthermore, we employ a mixed finite element method for numerical simulations of flexoelectric semiconductors. The high degree of agreement between the finite element solutions and the analytical exact solutions validates the utility of the exact solutions derived in this study as benchmark solutions for related numerical methods. This study offers insights and guidance for the design of flexoelectric semiconductor devices and provides a deeper understanding of the multiphysics field coupling behavior of flexoelectric semiconductors containing defects.

{"title":"Plane strain problems for flexoelectric semiconductors","authors":"Jinchen Xie , Xiaowen He","doi":"10.1016/j.euromechsol.2025.105573","DOIUrl":"10.1016/j.euromechsol.2025.105573","url":null,"abstract":"<div><div>The flexoelectric effect, which is induced by strain gradients, is a pervasive phenomenon in dielectric and semiconductor materials. Flexoelectric semiconductors have considerable potential for application in the field of micro- and nanoelectronics, although their theoretical research is still in its infancy. In particular, there is a paucity of research on the exact solutions of the multiphysics field coupling problems for flexoelectric semiconductors. In light of these considerations, this paper presents the first comprehensive and rigorous investigation into the plane strain issues pertaining to flexoelectric semiconductors. The coupled governing equations for flexoelectric semiconductors under plane strain conditions are reformulated for decoupling purposes. On this basis, we derive the exact solutions to a series of plane-strain problems for flexoelectric semiconductors, including bending of beams, deformation of pressurized cylinders, cylindrical cavities, cylindrical inhomogeneities, and cylindrical inclusion problems with eigenstrain. By employing these exact solutions, we investigate the size effect of multiphysics field coupling in flexoelectric semiconductors and the influence of the initial doping concentration. Furthermore, we employ a mixed finite element method for numerical simulations of flexoelectric semiconductors. The high degree of agreement between the finite element solutions and the analytical exact solutions validates the utility of the exact solutions derived in this study as benchmark solutions for related numerical methods. This study offers insights and guidance for the design of flexoelectric semiconductor devices and provides a deeper understanding of the multiphysics field coupling behavior of flexoelectric semiconductors containing defects.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"111 ","pages":"Article 105573"},"PeriodicalIF":4.4,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143136048","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Kriging-based uncertainty optimization of vibration characteristics for laminated elliptical shells considering material and load uncertainties

IF 4.4 2区工程技术 Q1 MECHANICS

European Journal of Mechanics A-Solids

Pub Date : 2025-01-22 DOI: 10.1016/j.euromechsol.2025.105587

Tianchen Huang , Qingshan Wang , Liming Chen , Rui Zhong

In this paper, an uncertainty optimization method based on Kriging surrogate model is proposed to optimize the laying angles of laminated elliptical shells. First, a transient dynamic model of laminated elliptical shells is constructed to calculate the vibration energy. The accuracy of the transient dynamic model is validated by comparing the results from literature with the solutions of finite element model. Then, the Subtraction-Average-Based Optimizer is improved and used for the optimization of the hyper-parameters of the Kriging surrogate model. Furthermore, a sensitivity analysis is conducted using the constructed Kriging surrogate models to identify several uncertainty parameters that have a significant impact on the vibration energy response. Subsequently, two Kriging surrogate models with the identified significant uncertainty parameters and the design variables (laying angles) as input and the vibration energy as output are reconstructed for different structural boundaries, thicknesses, and shift distance of revolution axis, respectively. The applicability of these Kriging surrogate models for uncertainty analysis is verified by comparing with the Monte Carlo simulation results. Finally, the improved Subtraction-Average-Based Optimizer (ISABO) combined with the Kriging surrogate models is employed to optimize the laying angles of the laminated elliptical shells under material and load uncertainties. The results of the optimized peak values of vibration energy and intervals of peaks demonstrate that the uncertainty optimization method proposed in this paper is applicable and efficient.

{"title":"Kriging-based uncertainty optimization of vibration characteristics for laminated elliptical shells considering material and load uncertainties","authors":"Tianchen Huang , Qingshan Wang , Liming Chen , Rui Zhong","doi":"10.1016/j.euromechsol.2025.105587","DOIUrl":"10.1016/j.euromechsol.2025.105587","url":null,"abstract":"<div><div>In this paper, an uncertainty optimization method based on Kriging surrogate model is proposed to optimize the laying angles of laminated elliptical shells. First, a transient dynamic model of laminated elliptical shells is constructed to calculate the vibration energy. The accuracy of the transient dynamic model is validated by comparing the results from literature with the solutions of finite element model. Then, the Subtraction-Average-Based Optimizer is improved and used for the optimization of the hyper-parameters of the Kriging surrogate model. Furthermore, a sensitivity analysis is conducted using the constructed Kriging surrogate models to identify several uncertainty parameters that have a significant impact on the vibration energy response. Subsequently, two Kriging surrogate models with the identified significant uncertainty parameters and the design variables (laying angles) as input and the vibration energy as output are reconstructed for different structural boundaries, thicknesses, and shift distance of revolution axis, respectively. The applicability of these Kriging surrogate models for uncertainty analysis is verified by comparing with the Monte Carlo simulation results. Finally, the improved Subtraction-Average-Based Optimizer (ISABO) combined with the Kriging surrogate models is employed to optimize the laying angles of the laminated elliptical shells under material and load uncertainties. The results of the optimized peak values of vibration energy and intervals of peaks demonstrate that the uncertainty optimization method proposed in this paper is applicable and efficient.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"111 ","pages":"Article 105587"},"PeriodicalIF":4.4,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143136046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Efficient time-stepping for the evolution equations of damage-induced growth and remodelling in soft biological tissues

IF 4.4 2区工程技术 Q1 MECHANICS

European Journal of Mechanics A-Solids

Pub Date : 2025-01-21 DOI: 10.1016/j.euromechsol.2025.105582

Igor Tagiltsev, Peter Wriggers

The constrained mixture method is a powerful instrument to model soft biological tissues, in particular — their growth and remodelling (G&R) behaviour. Its clear drawback lays in the increase of governing equations which corresponds to the increase of material constituents. In the current paper we scrutinise a particular G&R model, that is based on the detailed description of material’s chemo-mechano-biological state, caused by excessive load associated with collagen fibres’ unfolding. The model consist of many interacting evolution equations, solving of which takes most of computational time during applied simulations. Two qualitative model assumptions are made to improve its capabilities. Moreover, several iteration-free numerical schemes are introduced addressing the integration of evolution equations. We show that the numerical performance of the model drastically improves with the proposed schemes, while no compromises with respect to robustness or accuracy of the simulation are made.

引用次数: 0

Stability loss of a thin subsurface layer as a result of stresses caused by the distributed electric charge

IF 4.4 2区工程技术 Q1 MECHANICS

European Journal of Mechanics A-Solids

Pub Date : 2025-01-20 DOI: 10.1016/j.euromechsol.2025.105585

Anton Y. Beliaev, Roman I. Izyumov, Alexander L. Svistkov

A new variant of the analysis of the mechanical behaviour of an elastic layer with uniformly distributed electric charges is proposed. With a special term in the equation, written on the basis of the first beginnings of thermodynamics, it is proposed to take into account the work done when the layer is deformed by electric charges. A new element in the theory is the use of a special tensor (orthoprojector) in recording the work done by electric charges. The article derives the defining equations from the laws of thermodynamics. It is shown that the Cauchy stress tensor is the sum of two terms. The first term determines the stresses arising from the interaction of the charges.

The application of the theory to the modelling of processes during ion plasma treatment of polymeric materials is considered. The purpose of the considered example is the analysis of the hypothesis that the phenomenon of the appearance of the wavy relief of the appeared carbonised layer on the surface of the polymer material can be connected with the stresses arising due to the fact that the charges try to deform the material at the repulsion. A methodology for estimating the stresses arising from the described process is proposed. A calculation is carried out which shows that the hypothesis passes numerical verification. A comparative analysis of the relief characteristics obtained by calculation according to the proposed model and the relief obtained by atomic force microscopy (AFM) of plasma-treated polyurethanes is carried out.

{"title":"Stability loss of a thin subsurface layer as a result of stresses caused by the distributed electric charge","authors":"Anton Y. Beliaev, Roman I. Izyumov, Alexander L. Svistkov","doi":"10.1016/j.euromechsol.2025.105585","DOIUrl":"10.1016/j.euromechsol.2025.105585","url":null,"abstract":"<div><div>A new variant of the analysis of the mechanical behaviour of an elastic layer with uniformly distributed electric charges is proposed. With a special term in the equation, written on the basis of the first beginnings of thermodynamics, it is proposed to take into account the work done when the layer is deformed by electric charges. A new element in the theory is the use of a special tensor (orthoprojector) in recording the work done by electric charges. The article derives the defining equations from the laws of thermodynamics. It is shown that the Cauchy stress tensor is the sum of two terms. The first term determines the stresses arising from the interaction of the charges.</div><div>The application of the theory to the modelling of processes during ion plasma treatment of polymeric materials is considered. The purpose of the considered example is the analysis of the hypothesis that the phenomenon of the appearance of the wavy relief of the appeared carbonised layer on the surface of the polymer material can be connected with the stresses arising due to the fact that the charges try to deform the material at the repulsion. A methodology for estimating the stresses arising from the described process is proposed. A calculation is carried out which shows that the hypothesis passes numerical verification. A comparative analysis of the relief characteristics obtained by calculation according to the proposed model and the relief obtained by atomic force microscopy (AFM) of plasma-treated polyurethanes is carried out.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"111 ","pages":"Article 105585"},"PeriodicalIF":4.4,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143136049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Prediction on the fatigue behavior of Ti–6Al–4V components treated by split sleeve cold expansion with different final reaming depth

IF 4.4 2区工程技术 Q1 MECHANICS

European Journal of Mechanics A-Solids

Pub Date : 2025-01-18 DOI: 10.1016/j.euromechsol.2025.105578

Zhangchi Dang , Li Yan , Xuedong Gan , Dongyun Ge

The fatigue life of fastening holes in metal components is a critical issue in structural design. Many methods have been proposed to enhance the fatigue performance of the components, among which the split sleeve cold expansion method is an effective and widely used one. Previous research has shown that the final reaming process will increase the residual stress level in the components, but this does not always improve the fatigue life. Therefore, this paper presents a comprehensive study of the residual stress distribution in the components treated by the split sleeve cold expansion technique and also estimates the fatigue life of the components using numerical methods with a new mean stress correction model specifically modified for Ti–6Al–4V alloy. The calculation results agreed with the previous experiments well and the changing pattern of fatigue life to the reaming depth is acquired, which shows that a small ratio of reaming benefits the fatigue life by providing extra compressive stress, but the benefit of excessive reaming on residual stress does not bring about further life extension. This phenomenon can be well explained using the proposed four-area model of the cumulative damage in the components. Apart from increasing the residual stress level near the hole edge, the reaming process will cause another area with maximum tensile stress to move inward and bear a higher level of load, which is harmful to the fatigue life. The movement of the fatigue crack initiation area is also in good agreement with the experimental results, which verifies the reliability of the proposed model.

{"title":"Prediction on the fatigue behavior of Ti–6Al–4V components treated by split sleeve cold expansion with different final reaming depth","authors":"Zhangchi Dang , Li Yan , Xuedong Gan , Dongyun Ge","doi":"10.1016/j.euromechsol.2025.105578","DOIUrl":"10.1016/j.euromechsol.2025.105578","url":null,"abstract":"<div><div>The fatigue life of fastening holes in metal components is a critical issue in structural design. Many methods have been proposed to enhance the fatigue performance of the components, among which the split sleeve cold expansion method is an effective and widely used one. Previous research has shown that the final reaming process will increase the residual stress level in the components, but this does not always improve the fatigue life. Therefore, this paper presents a comprehensive study of the residual stress distribution in the components treated by the split sleeve cold expansion technique and also estimates the fatigue life of the components using numerical methods with a new mean stress correction model specifically modified for Ti–6Al–4V alloy. The calculation results agreed with the previous experiments well and the changing pattern of fatigue life to the reaming depth is acquired, which shows that a small ratio of reaming benefits the fatigue life by providing extra compressive stress, but the benefit of excessive reaming on residual stress does not bring about further life extension. This phenomenon can be well explained using the proposed four-area model of the cumulative damage in the components. Apart from increasing the residual stress level near the hole edge, the reaming process will cause another area with maximum tensile stress to move inward and bear a higher level of load, which is harmful to the fatigue life. The movement of the fatigue crack initiation area is also in good agreement with the experimental results, which verifies the reliability of the proposed model.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"111 ","pages":"Article 105578"},"PeriodicalIF":4.4,"publicationDate":"2025-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143135995","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Guided wave propagation and scattering in pipes with axisymmetric defects under reciprocity considerations

IF 4.4 2区工程技术 Q1 MECHANICS

European Journal of Mechanics A-Solids

Pub Date : 2025-01-17 DOI: 10.1016/j.euromechsol.2025.105584

Ductho Le , Hoai-Nam Tran , Hoang Ngoc Quy , Haidang Phan

This paper presents a theoretical framework utilizing the reciprocity theorem to investigate the behavior of guided waves in pipe-like structures. The reciprocity theorem is first employed to derive closed-form solutions of guided waves generated by time-harmonics sources in seamless pipes. The application of this technique is then extended to address the scattering of longitudinal modes by a circumferential defect in pipes. The scattered field results are afterward validated by numerical simulations, demonstrating good quantitative agreement across various defect configurations. Furthermore, we introduce the dispersion curves superimposed by wave magnitude spectra, providing a clear visualization of wave propagation phenomena in pipes. These curves can also be utilized for optimal mode and excitation frequency selection in practical inspection processes. This study makes a significant contribution to the field of nondestructive evaluation by offering a simple and effective approach to analyzing the scattering of guided longitudinal waves in pipes. The results can enhance the accuracy and reliability of defect detection and characterization, leading to more efficient and cost-effective maintenance and repair processes.

{"title":"Guided wave propagation and scattering in pipes with axisymmetric defects under reciprocity considerations","authors":"Ductho Le , Hoai-Nam Tran , Hoang Ngoc Quy , Haidang Phan","doi":"10.1016/j.euromechsol.2025.105584","DOIUrl":"10.1016/j.euromechsol.2025.105584","url":null,"abstract":"<div><div>This paper presents a theoretical framework utilizing the reciprocity theorem to investigate the behavior of guided waves in pipe-like structures. The reciprocity theorem is first employed to derive closed-form solutions of guided waves generated by time-harmonics sources in seamless pipes. The application of this technique is then extended to address the scattering of longitudinal modes by a circumferential defect in pipes. The scattered field results are afterward validated by numerical simulations, demonstrating good quantitative agreement across various defect configurations. Furthermore, we introduce the dispersion curves superimposed by wave magnitude spectra, providing a clear visualization of wave propagation phenomena in pipes. These curves can also be utilized for optimal mode and excitation frequency selection in practical inspection processes. This study makes a significant contribution to the field of nondestructive evaluation by offering a simple and effective approach to analyzing the scattering of guided longitudinal waves in pipes. The results can enhance the accuracy and reliability of defect detection and characterization, leading to more efficient and cost-effective maintenance and repair processes.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"111 ","pages":"Article 105584"},"PeriodicalIF":4.4,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143136063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A self-locked chiral honeycomb: In-plane compression behavior and energy absorption

IF 4.4 2区工程技术 Q1 MECHANICS

European Journal of Mechanics A-Solids

Pub Date : 2025-01-17 DOI: 10.1016/j.euromechsol.2025.105580

Hongzhe Niu , Jiaming Lu , Ruixian Qin , Xi Wang , Qijian Li , Tianyi Li , Bingzhi Chen

A novel aluminum self-locked nested chiral structure (SLKH) has been introduced to significantly enhance the energy absorption capacity of honeycomb structures. This innovative design leverages the geometrical advantages of chirality, offering a cost-effective and facile manufacturing process. A comprehensive study on the mechanical properties and energy absorption characteristics was conducted by utilizing the LS-DYNA. The multi-parameter design investigation revealed that the proportional coefficient, in conjunction with the relative density, significantly influences the mechanical performance of the SLKH. Comparative analysis with integrated structures underscored the superior energy absorption and buffering capabilities of the SLKH. Furthermore, the study delved into the dynamic impact performance under quasi-static conditions, highlighting the impact of Poisson's ratio on self-locked structures. The findings provide valuable insights for the design and practical application of advanced cellular structures.

{"title":"A self-locked chiral honeycomb: In-plane compression behavior and energy absorption","authors":"Hongzhe Niu , Jiaming Lu , Ruixian Qin , Xi Wang , Qijian Li , Tianyi Li , Bingzhi Chen","doi":"10.1016/j.euromechsol.2025.105580","DOIUrl":"10.1016/j.euromechsol.2025.105580","url":null,"abstract":"<div><div>A novel aluminum self-locked nested chiral structure (SLKH) has been introduced to significantly enhance the energy absorption capacity of honeycomb structures. This innovative design leverages the geometrical advantages of chirality, offering a cost-effective and facile manufacturing process. A comprehensive study on the mechanical properties and energy absorption characteristics was conducted by utilizing the LS-DYNA. The multi-parameter design investigation revealed that the proportional coefficient, in conjunction with the relative density, significantly influences the mechanical performance of the SLKH. Comparative analysis with integrated structures underscored the superior energy absorption and buffering capabilities of the SLKH. Furthermore, the study delved into the dynamic impact performance under quasi-static conditions, highlighting the impact of Poisson's ratio on self-locked structures. The findings provide valuable insights for the design and practical application of advanced cellular structures.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"111 ","pages":"Article 105580"},"PeriodicalIF":4.4,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143135997","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

首页上一页

下一页尾页

类型

全部化学•材料生命科学医学物理工程技术环境•农林材料科学地球科学法学管理学化学环境科学与生态学计算机科学教育学经济学农林科学人文科学生物学数学物理与天体物理心理学综合性期刊其他工业工程理学历史学农学文学信息工程

数据库

全部 ACS Publications Elsevier ieeexplore Springer The Royal Society of Chemistry Wiley

期刊

European Journal of Mechanics A-Solids

全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.

﹀