Pub Date : 2026-02-02DOI: 10.1016/j.euromechsol.2026.106039
Chen Xuan
Flexural vibration can be triggered by rolling, an unusual way that has never been studied. Being a planar motion triggered from another motion, it integrates structural dynamics, flexural vibration and contact mechanics. I coin the term “rolling-induced flexural vibration” for this new problem, which is valuable not only to the fundamental theory of structural dynamics but also to various rolling mechanical systems like rolling soft robots. The developed wheels-on-a-string rolling beam that extends the Euler–Bernoulli theory overcomes numerical challenges in contact mechanics by removing inequalities in boundary conditions. An analysis of energy transport and dissipation highlights an unusual rolling beam system. Comparisons are conducted among 3D contact finite element analysis, the rolling beam model and a few analytic solutions. Despite ignoring certain aspect ratio dependence in 3D contact finite elements, the rolling beam model serves as a tool for assessing the efficiency and quality of 3D contact solutions to determine whether switching to alternative contact solvers is necessary. The computational efficiency of the rolling beam model can be up to hundreds of thousands of times higher than that of 3D contact finite elements.
{"title":"Rolling-induced flexural vibration","authors":"Chen Xuan","doi":"10.1016/j.euromechsol.2026.106039","DOIUrl":"10.1016/j.euromechsol.2026.106039","url":null,"abstract":"<div><div>Flexural vibration can be triggered by rolling, an unusual way that has never been studied. Being a planar motion triggered from another motion, it integrates structural dynamics, flexural vibration and contact mechanics. I coin the term “rolling-induced flexural vibration” for this new problem, which is valuable not only to the fundamental theory of structural dynamics but also to various rolling mechanical systems like rolling soft robots. The developed wheels-on-a-string rolling beam that extends the Euler–Bernoulli theory overcomes numerical challenges in contact mechanics by removing inequalities in boundary conditions. An analysis of energy transport and dissipation highlights an unusual rolling beam system. Comparisons are conducted among 3D contact finite element analysis, the rolling beam model and a few analytic solutions. Despite ignoring certain aspect ratio dependence in 3D contact finite elements, the rolling beam model serves as a tool for assessing the efficiency and quality of 3D contact solutions to determine whether switching to alternative contact solvers is necessary. The computational efficiency of the rolling beam model can be up to hundreds of thousands of times higher than that of 3D contact finite elements.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"118 ","pages":"Article 106039"},"PeriodicalIF":4.2,"publicationDate":"2026-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146098577","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}
This study introduces an analytical framework for investigating the propagation and scattering of Stoneley waves at the interface between two orthotropic elastic half-spaces under harmonic excitation. By applying elastodynamic reciprocity theorems, we derive closed-form solutions for the associated displacement and stress fields and analyze their interactions with interfacial delamination. The proposed formulations enable direct evaluation of wave scattering behavior, providing an efficient and accurate tool for characterizing wave–defect interactions in anisotropic media. The analytical predictions are validated through numerical simulations, demonstrating strong agreement and confirming the applicability of the method across a variety of material configurations. The results extend the potential of nondestructive evaluation (NDE) and structural health monitoring (SHM) by providing a reliable methodology to detect and quantify interfacial defects in composite structures. The developed framework contributes to a deeper understanding of interface wave mechanics and serves as a foundation for practical applications in materials engineering, aerospace, and geomechanics.
{"title":"Analytical and numerical investigation of Stoneley wave scattering by an interfacial delamination in hybrid composites","authors":"Ngoc Quy Hoang , TruongGiang Nguyen , Ductho Le , Haidang Phan","doi":"10.1016/j.euromechsol.2026.106046","DOIUrl":"10.1016/j.euromechsol.2026.106046","url":null,"abstract":"<div><div>This study introduces an analytical framework for investigating the propagation and scattering of Stoneley waves at the interface between two orthotropic elastic half-spaces under harmonic excitation. By applying elastodynamic reciprocity theorems, we derive closed-form solutions for the associated displacement and stress fields and analyze their interactions with interfacial delamination. The proposed formulations enable direct evaluation of wave scattering behavior, providing an efficient and accurate tool for characterizing wave–defect interactions in anisotropic media. The analytical predictions are validated through numerical simulations, demonstrating strong agreement and confirming the applicability of the method across a variety of material configurations. The results extend the potential of nondestructive evaluation (NDE) and structural health monitoring (SHM) by providing a reliable methodology to detect and quantify interfacial defects in composite structures. The developed framework contributes to a deeper understanding of interface wave mechanics and serves as a foundation for practical applications in materials engineering, aerospace, and geomechanics.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"117 ","pages":"Article 106046"},"PeriodicalIF":4.2,"publicationDate":"2026-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146077633","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}
Pub Date : 2026-01-29DOI: 10.1016/j.euromechsol.2026.106038
Anastasia Markou, Luc St-Pierre
We investigated the potential of demi-regular tessellations to outperform existing prismatic lattice materials, such as the triangular topology. The in-plane mechanical properties of three demi-regular tessellations were derived analytically, and then corroborated by both finite element simulations and experiments. Our analysis showed that these three topologies are elastically isotropic and have a stretching-dominated behaviour. The elastic modulus of these three demi-regular topologies was 5%–20% lower than that of a triangular lattice. Demi-regular lattices, however, had a high elastic buckling strength, up to 42% higher than their triangular counterpart. In addition, two demi-regular lattices were found to be fairly insensitive to imperfections. These characteristics make them ideal topologies for ultra-lightweight applications, where failure is usually governed by elastic buckling.
{"title":"In-plane mechanical properties of demi-regular lattice materials","authors":"Anastasia Markou, Luc St-Pierre","doi":"10.1016/j.euromechsol.2026.106038","DOIUrl":"10.1016/j.euromechsol.2026.106038","url":null,"abstract":"<div><div>We investigated the potential of demi-regular tessellations to outperform existing prismatic lattice materials, such as the triangular topology. The in-plane mechanical properties of three demi-regular tessellations were derived analytically, and then corroborated by both finite element simulations and experiments. Our analysis showed that these three topologies are elastically isotropic and have a stretching-dominated behaviour. The elastic modulus of these three demi-regular topologies was 5%–20% lower than that of a triangular lattice. Demi-regular lattices, however, had a high elastic buckling strength, up to 42% higher than their triangular counterpart. In addition, two demi-regular lattices were found to be fairly insensitive to imperfections. These characteristics make them ideal topologies for ultra-lightweight applications, where failure is usually governed by elastic buckling.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"117 ","pages":"Article 106038"},"PeriodicalIF":4.2,"publicationDate":"2026-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146077637","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}
Pub Date : 2026-01-28DOI: 10.1016/j.euromechsol.2026.106043
Rui Barreira , Nils Koltzenburg , Robin Wieland , Selcuk Mentese , Uwe Kramer , Bekim Berisha
This work introduces a novel physics-based model to track and quantify damage-induced degradation in metallic conductors through the increase in electrical resistance. We hypothesize this degradation is driven by the growth of internal porosity, and propose an evolution law for the decrease in material conductivity based on the Voigt–Reuss composite bounds with a single fitting parameter. To relate the local conductivity with the effective resistance of a conductor, a novel homogenization scheme based on power equivalency principles is also introduced. Our model is validated on copper microvias under interconnect stress test conditions for which experimental data are collected. Finite element simulations of 200 complete thermal cycles are performed for both stacked and staggered microvia configurations, with geometries derived from scanning electron microscopy measurements. The proposed model fits the industrial experimental data well, improving upon existing models by over one order of magnitude. The analysis is extended with a crystal plasticity constitutive model informed by electron backscatter diffraction texture data, which revealed highly localized plastic strain hotspots within the grain structure, preferential sites for void nucleation and growth. This provides direct evidence for the mechanism that creates porosity within the microvia, validating the fundamental assumptions of our model.
{"title":"Void growth drives electrical resistance increase: A physics-based damage model for ductile metallic conductors","authors":"Rui Barreira , Nils Koltzenburg , Robin Wieland , Selcuk Mentese , Uwe Kramer , Bekim Berisha","doi":"10.1016/j.euromechsol.2026.106043","DOIUrl":"10.1016/j.euromechsol.2026.106043","url":null,"abstract":"<div><div>This work introduces a novel physics-based model to track and quantify damage-induced degradation in metallic conductors through the increase in electrical resistance. We hypothesize this degradation is driven by the growth of internal porosity, and propose an evolution law for the decrease in material conductivity based on the Voigt–Reuss composite bounds with a single fitting parameter. To relate the local conductivity with the effective resistance of a conductor, a novel homogenization scheme based on power equivalency principles is also introduced. Our model is validated on copper microvias under interconnect stress test conditions for which experimental data are collected. Finite element simulations of 200 complete thermal cycles are performed for both stacked and staggered microvia configurations, with geometries derived from scanning electron microscopy measurements. The proposed model fits the industrial experimental data well, improving upon existing models by over one order of magnitude. The analysis is extended with a crystal plasticity constitutive model informed by electron backscatter diffraction texture data, which revealed highly localized plastic strain hotspots within the grain structure, preferential sites for void nucleation and growth. This provides direct evidence for the mechanism that creates porosity within the microvia, validating the fundamental assumptions of our model.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"117 ","pages":"Article 106043"},"PeriodicalIF":4.2,"publicationDate":"2026-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146077636","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}
Pub Date : 2026-01-23DOI: 10.1016/j.euromechsol.2026.106040
Ziyi Liu, Haikuan Dong, Guanhua Zheng, Qiang Gao
In this paper, an efficient finite element method (FEM) is developed for vibroacoustic analysis of sandwich and honeycomb panels in an infinite fluid domain. The infinite fluid domain is approximated by a sufficiently large cubic domain, whose size is determined according to the sound radiation and wave decay criteria. Within the frequency range of interest (100–5000 Hz), the mesh resolution adaptively refined according to wavelength and the frequency-dependent finite element model is established to balance accuracy and computational efficiency. Moreover, an iterative algorithm separates the fluid-structure interaction equation into structural and fluid equations. Then, the structural equation is solved directly, while the fluid equation is efficiently handled using the Kronecker product, which transforms the large n3-order matrices into a series of n-order operations and significantly reduces computational cost. Numerical examples demonstrate that the proposed method accurately predicts the vibroacoustic response of sandwich and honeycomb panels. Compared with Ansys simulation, the proposed method maintains high accuracy, with CPU time reduced by 8–24 times.
{"title":"Vibroacoustic analysis of sandwich and honeycomb panels using an efficient FEM approach","authors":"Ziyi Liu, Haikuan Dong, Guanhua Zheng, Qiang Gao","doi":"10.1016/j.euromechsol.2026.106040","DOIUrl":"10.1016/j.euromechsol.2026.106040","url":null,"abstract":"<div><div>In this paper, an efficient finite element method (FEM) is developed for vibroacoustic analysis of sandwich and honeycomb panels in an infinite fluid domain. The infinite fluid domain is approximated by a sufficiently large cubic domain, whose size is determined according to the sound radiation and wave decay criteria. Within the frequency range of interest (100–5000 Hz), the mesh resolution adaptively refined according to wavelength and the frequency-dependent finite element model is established to balance accuracy and computational efficiency. Moreover, an iterative algorithm separates the fluid-structure interaction equation into structural and fluid equations. Then, the structural equation is solved directly, while the fluid equation is efficiently handled using the Kronecker product, which transforms the large <em>n</em><sup>3</sup>-order matrices into a series of <em>n</em>-order operations and significantly reduces computational cost. Numerical examples demonstrate that the proposed method accurately predicts the vibroacoustic response of sandwich and honeycomb panels. Compared with Ansys simulation, the proposed method maintains high accuracy, with CPU time reduced by 8–24 times.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"117 ","pages":"Article 106040"},"PeriodicalIF":4.2,"publicationDate":"2026-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146077640","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}
Pub Date : 2026-01-22DOI: 10.1016/j.euromechsol.2026.106037
Xiaosong Hu , Lei Wang , Qingsen Hu
Aiming at the problem of changes in the dynamic characteristics of the gear pair caused by crack propagation under the action of the coupling effect of the inter-tooth structure, a new analytical model for the stiffness of cracked teeth based on the potential energy method is proposed. The model analyses the difference in influence caused by the location of crack propagation and the degree of deterioration. Then an improved cracked gear pair dynamics model is established by integrating the crack and coupling effects. The dynamic characteristics of the gear system under the interaction of crack and structural coupling effects are revealed. The computational results are compared with the existing model and verified by finite element results. The results show that the structural coupling effect transforms the dynamic behaviour of the system and the change in the tooth load bearing region caused by crack propagation cannot be ignored. The proposed model provides more accurate mesh stiffness calculation and dynamic simulation, which provides a theoretical basis and valuable reference for the dynamic simulation and fault diagnosis of cracked gear systems.
{"title":"Analysis of dynamic response of cracked gear system with structural coupling effect","authors":"Xiaosong Hu , Lei Wang , Qingsen Hu","doi":"10.1016/j.euromechsol.2026.106037","DOIUrl":"10.1016/j.euromechsol.2026.106037","url":null,"abstract":"<div><div>Aiming at the problem of changes in the dynamic characteristics of the gear pair caused by crack propagation under the action of the coupling effect of the inter-tooth structure, a new analytical model for the stiffness of cracked teeth based on the potential energy method is proposed. The model analyses the difference in influence caused by the location of crack propagation and the degree of deterioration. Then an improved cracked gear pair dynamics model is established by integrating the crack and coupling effects. The dynamic characteristics of the gear system under the interaction of crack and structural coupling effects are revealed. The computational results are compared with the existing model and verified by finite element results. The results show that the structural coupling effect transforms the dynamic behaviour of the system and the change in the tooth load bearing region caused by crack propagation cannot be ignored. The proposed model provides more accurate mesh stiffness calculation and dynamic simulation, which provides a theoretical basis and valuable reference for the dynamic simulation and fault diagnosis of cracked gear systems.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"117 ","pages":"Article 106037"},"PeriodicalIF":4.2,"publicationDate":"2026-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146077632","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}
Pub Date : 2026-01-22DOI: 10.1016/j.euromechsol.2026.106036
Elżbieta Bura , Wiesław Frącz
This study investigates the fracture mechanics of notched P3HB specimens subjected to monotonic tensile loading under different average strain rates, from 0.14·10−3 s−1 to 14·10−3 s−1, and tested 24, 168, and 720 h after manufacturing to capture changes due to natural aging. Flat specimens were weakened with double-sided V-notches of various root radii to analyse stress concentration effects. Force response, elongation, and fracture surface morphology were examined to identify mechanisms governing crack initiation and propagation. Natural aging increased Young's modulus by 15–20 % and reduced elongation at break by 30–40 %, indicating embrittlement over time. In contrast, higher strain rates promoted up to 25 % greater maximum force and elongation to fracture, likely due to strain-induced mesophase formation. In all cases, fracture initiated at the notch root, with a larger notch radius reducing stress concentration and delaying crack initiation. A progressive shift toward brittle fracture behaviour was observed with aging duration and strain rate. The predictive capability of two classical brittle-fracture criteria-Maximum Tangential Stress (MTS) and Mean Stress (MS) – was evaluated. Significant discrepancies between predicted and experimental critical loads were found, with errors of approximately 49–56 %. These results demonstrate that existing criteria do not adequately capture local deformation mechanisms in P3HB. Reliable fracture prediction therefore requires models incorporating evolving plastic strain fields and experimentally derived hardening behaviour, providing a foundation for improved failure criteria for aging-sensitive polymers. When critical parameters were calibrated using experimental data within the Theory of Critical Distances framework, the prediction error was reduced to below 7 % (MTS), demonstrating that the proposed approach provides quantitative predictive capability for notched P3HB specimens across different aging times and strain rates.
{"title":"Fracture behaviour of notched P3HB specimens – Effects of strain rate and natural aging","authors":"Elżbieta Bura , Wiesław Frącz","doi":"10.1016/j.euromechsol.2026.106036","DOIUrl":"10.1016/j.euromechsol.2026.106036","url":null,"abstract":"<div><div>This study investigates the fracture mechanics of notched P3HB specimens subjected to monotonic tensile loading under different average strain rates, from 0.14·10<sup>−3</sup> s<sup>−1</sup> to 14·10<sup>−3</sup> s<sup>−1</sup>, and tested 24, 168, and 720 h after manufacturing to capture changes due to natural aging. Flat specimens were weakened with double-sided V-notches of various root radii to analyse stress concentration effects. Force response, elongation, and fracture surface morphology were examined to identify mechanisms governing crack initiation and propagation. Natural aging increased Young's modulus by 15–20 % and reduced elongation at break by 30–40 %, indicating embrittlement over time. In contrast, higher strain rates promoted up to 25 % greater maximum force and elongation to fracture, likely due to strain-induced mesophase formation. In all cases, fracture initiated at the notch root, with a larger notch radius reducing stress concentration and delaying crack initiation. A progressive shift toward brittle fracture behaviour was observed with aging duration and strain rate. The predictive capability of two classical brittle-fracture criteria-Maximum Tangential Stress (MTS) and Mean Stress (MS) – was evaluated. Significant discrepancies between predicted and experimental critical loads were found, with errors of approximately 49–56 %. These results demonstrate that existing criteria do not adequately capture local deformation mechanisms in P3HB. Reliable fracture prediction therefore requires models incorporating evolving plastic strain fields and experimentally derived hardening behaviour, providing a foundation for improved failure criteria for aging-sensitive polymers. When critical parameters were calibrated using experimental data within the Theory of Critical Distances framework, the prediction error was reduced to below 7 % (MTS), demonstrating that the proposed approach provides quantitative predictive capability for notched P3HB specimens across different aging times and strain rates.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"117 ","pages":"Article 106036"},"PeriodicalIF":4.2,"publicationDate":"2026-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146038065","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}
Pub Date : 2026-01-21DOI: 10.1016/j.euromechsol.2026.106034
Bhaskar Anupam, Keshav Purviya, Ankur Miglani, Aman Khurana
Dielectric elastomer minimum energy structures (DEMES) have gained significant attention for their ability to switch between multiple equilibrium states. These structures are formed when a pre-stretched elastomer film adheres to an inextensible frame and achieves equilibrium through energy minimization. Traditional methods for analyzing DEMES mechanics-numerical, theoretical, and experimental are often labor-intensive and time-consuming. This paper introduces the application of artificial neural network (ANN) techniques to predict the behavior of DEMES-based actuators efficiently. Using the Levenberg–Marquardt and Bayesian Regularization algorithms, the performance of two prototypes: the four-arm gripper and the flapping-wing actuator previously studied experimentally and numerically in Khurana et al. (2024a), is predicted. The ANN-based approach demonstrates excellent agreement with the numerical results while significantly reducing computation time. This study highlights the potential of ANN techniques as a fast and reliable tool for the parametric evaluation of DEMES structures, streamlining the design and analysis process. Future applications of DEMES, enhanced by ANN-based predictive models, include the development of adaptive soft robotics, bio-inspired actuators, and energy-efficient morphing structures. These advancements could lead to intelligent material systems with real-time control capabilities for biomedical devices, aerospace engineering, and wearable technologies.
{"title":"Designing the futuristic dielectric elastomer minimum energy structures using artificial neural networks (ANN)","authors":"Bhaskar Anupam, Keshav Purviya, Ankur Miglani, Aman Khurana","doi":"10.1016/j.euromechsol.2026.106034","DOIUrl":"10.1016/j.euromechsol.2026.106034","url":null,"abstract":"<div><div>Dielectric elastomer minimum energy structures (DEMES) have gained significant attention for their ability to switch between multiple equilibrium states. These structures are formed when a pre-stretched elastomer film adheres to an inextensible frame and achieves equilibrium through energy minimization. Traditional methods for analyzing DEMES mechanics-numerical, theoretical, and experimental are often labor-intensive and time-consuming. This paper introduces the application of artificial neural network (ANN) techniques to predict the behavior of DEMES-based actuators efficiently. Using the Levenberg–Marquardt and Bayesian Regularization algorithms, the performance of two prototypes: the four-arm gripper and the flapping-wing actuator previously studied experimentally and numerically in <span><span>Khurana et al. (2024a)</span></span>, is predicted. The ANN-based approach demonstrates excellent agreement with the numerical results while significantly reducing computation time. This study highlights the potential of ANN techniques as a fast and reliable tool for the parametric evaluation of DEMES structures, streamlining the design and analysis process. Future applications of DEMES, enhanced by ANN-based predictive models, include the development of adaptive soft robotics, bio-inspired actuators, and energy-efficient morphing structures. These advancements could lead to intelligent material systems with real-time control capabilities for biomedical devices, aerospace engineering, and wearable technologies.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"117 ","pages":"Article 106034"},"PeriodicalIF":4.2,"publicationDate":"2026-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146077635","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}
Pub Date : 2026-01-21DOI: 10.1016/j.euromechsol.2026.106035
Alice Kutsyy , Adeline Wihardja , Victoria Lee , Kaushik Bhattacharya
Nematic elastomers are a particular class of liquid crystal elastomers (LCEs) that exhibit both liquid-crystalline order and rubber (entropic) elasticity. This combination makes them stimuli-responsive soft materials with a number of unusual thermo-mechanical properties. They have been proposed for various applications, including soft robotics, enhanced adhesion, and impact resistance. This paper presents a new experimental setup and a comprehensive dataset characterizing the soft behavior of nematic elastomers over a range of temperatures and strain rates. We also fit the results to a recently developed model of nematic elastomers (Lee et al., 2023).
向列弹性体是一类特殊的液晶弹性体（LCEs），它同时具有液晶有序和橡胶（熵）弹性。这种组合使它们成为具有许多不寻常的热机械性能的刺激响应软材料。它们已被提出用于各种应用，包括软机器人，增强附着力和抗冲击性。本文提出了一个新的实验装置和一个全面的数据集，表征了向列弹性体在一系列温度和应变速率下的软行为。我们还将结果拟合到最近开发的向列弹性体模型（Lee et al., 2023）。
{"title":"Characterization of the soft behavior of nematic elastomers over a range of temperature and strain rates","authors":"Alice Kutsyy , Adeline Wihardja , Victoria Lee , Kaushik Bhattacharya","doi":"10.1016/j.euromechsol.2026.106035","DOIUrl":"10.1016/j.euromechsol.2026.106035","url":null,"abstract":"<div><div>Nematic elastomers are a particular class of liquid crystal elastomers (LCEs) that exhibit both liquid-crystalline order and rubber (entropic) elasticity. This combination makes them stimuli-responsive soft materials with a number of unusual thermo-mechanical properties. They have been proposed for various applications, including soft robotics, enhanced adhesion, and impact resistance. This paper presents a new experimental setup and a comprehensive dataset characterizing the soft behavior of nematic elastomers over a range of temperatures and strain rates. We also fit the results to a recently developed model of nematic elastomers (<span><span>Lee et al., 2023</span></span>).</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"117 ","pages":"Article 106035"},"PeriodicalIF":4.2,"publicationDate":"2026-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146077638","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}
Pub Date : 2026-01-20DOI: 10.1016/j.euromechsol.2026.106033
Dong Tang , Shilin Li , Long Yu , Xinfu He , Xiazi Xiao
In this work, a creep rupture life prediction model is proposed by combining the creep constitutive laws and Monkman-Grant (M-G) relation to analyze the rupture time under thermal and irradiation creep. The model could simultaneously characterize the influence of testing temperature, applied stress and irradiation damage on the steady-state creep strain rate by taking into account corresponding microstructure evolution, accurately capture the mechanism transitions during creep, and then convert the steady-state creep strain rate into macroscopic rupture life via the M-G relation. Once the irradiation effect is ignored, the model can be degraded to predict the thermal creep rupture life. Model validation is achieved by comparing theoretical results with the experimental data of 15-15Ti, 316H, P92 and 304 steels for both thermal and irradiation creep. Related mechanism analyses indicate that the shortened thermal creep rupture life with increasing stress and temperature is mainly ascribed to the accelerated activity of dislocation climb that leads to the enhancement of dislocation mobility and acceleration of creep damage accumulation. Under irradiation creep, it is the elevated vacancy diffusion coefficient that leads to the enhanced activity of dislocation climb, and finally results in the shorter irradiation creep rupture life when compared with the one under thermal creep. The proposed model could provide an efficient theoretical tool for material creep life assessment under extreme environments.
{"title":"Creep rupture life prediction model combining microstructure evolution and Monkman-Grant relation for thermal and irradiation creep","authors":"Dong Tang , Shilin Li , Long Yu , Xinfu He , Xiazi Xiao","doi":"10.1016/j.euromechsol.2026.106033","DOIUrl":"10.1016/j.euromechsol.2026.106033","url":null,"abstract":"<div><div>In this work, a creep rupture life prediction model is proposed by combining the creep constitutive laws and Monkman-Grant (M-G) relation to analyze the rupture time under thermal and irradiation creep. The model could simultaneously characterize the influence of testing temperature, applied stress and irradiation damage on the steady-state creep strain rate by taking into account corresponding microstructure evolution, accurately capture the mechanism transitions during creep, and then convert the steady-state creep strain rate into macroscopic rupture life via the M-G relation. Once the irradiation effect is ignored, the model can be degraded to predict the thermal creep rupture life. Model validation is achieved by comparing theoretical results with the experimental data of 15-15Ti, 316H, P92 and 304 steels for both thermal and irradiation creep. Related mechanism analyses indicate that the shortened thermal creep rupture life with increasing stress and temperature is mainly ascribed to the accelerated activity of dislocation climb that leads to the enhancement of dislocation mobility and acceleration of creep damage accumulation. Under irradiation creep, it is the elevated vacancy diffusion coefficient that leads to the enhanced activity of dislocation climb, and finally results in the shorter irradiation creep rupture life when compared with the one under thermal creep. The proposed model could provide an efficient theoretical tool for material creep life assessment under extreme environments.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"117 ","pages":"Article 106033"},"PeriodicalIF":4.2,"publicationDate":"2026-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146038061","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}
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