Pub Date : 2025-04-17DOI: 10.1177/10567895251329950
Yanmo Weng, Pizhong Qiao, Lizhi Sun
This study aims to investigate the tensile behavior of ultra-high performance concrete (UHPC) using a multiscale modeling approach. A micromechanics-based finite-element method is employed to investigate the evolution of microstructural damage and its effect on the macroscopic tensile strength of UHPC. X-ray computed tomography (CT) techniques are used to create a realistic microstructural geometry, and the cohesive-zone models are adopted to quantify the microcrack growth rate and the overall mechanical properties of UHPC under tension. A stiffness-degradation parameter is introduced to explain the evolution of the material tensile behavior. Satisfactory agreements are achieved between the simulation results and the experimental data from the direct tensile tests. To demonstrate the capability of the proposed multiscale modeling framework, the influences of curing age and freeze–thaw cycles of UHPC materials are further taken into account. The proposed multiscale simulation scheme integrated with the x-ray CT techniques and cohesive-zone model can serve as an effective and reliable method to capture the nonlinear tensile responses of UHPC materials and structures.
本研究旨在采用多尺度建模方法研究超高性能混凝土（UHPC）的拉伸行为。研究采用了基于微观力学的有限元方法来研究微观结构损伤的演变及其对超高强混凝土宏观抗拉强度的影响。利用 X 射线计算机断层扫描（CT）技术创建了逼真的微观结构几何形状，并采用内聚区模型来量化微裂纹的增长速度和拉伸条件下超高强度混凝土的整体力学性能。引入了刚度降解参数来解释材料拉伸行为的演变。模拟结果与直接拉伸试验的实验数据之间达到了令人满意的一致。为了证明所提出的多尺度建模框架的能力，还进一步考虑了 UHPC 材料的固化龄期和冻融循环的影响。所提出的多尺度模拟方案与 X 射线 CT 技术和内聚区模型相结合，可作为捕捉 UHPC 材料和结构非线性拉伸响应的有效而可靠的方法。
{"title":"Effect of microstructural damage evolution on tensile strength of ultra-high performance concrete: A multiscale numerical scheme","authors":"Yanmo Weng, Pizhong Qiao, Lizhi Sun","doi":"10.1177/10567895251329950","DOIUrl":"https://doi.org/10.1177/10567895251329950","url":null,"abstract":"This study aims to investigate the tensile behavior of ultra-high performance concrete (UHPC) using a multiscale modeling approach. A micromechanics-based finite-element method is employed to investigate the evolution of microstructural damage and its effect on the macroscopic tensile strength of UHPC. X-ray computed tomography (CT) techniques are used to create a realistic microstructural geometry, and the cohesive-zone models are adopted to quantify the microcrack growth rate and the overall mechanical properties of UHPC under tension. A stiffness-degradation parameter is introduced to explain the evolution of the material tensile behavior. Satisfactory agreements are achieved between the simulation results and the experimental data from the direct tensile tests. To demonstrate the capability of the proposed multiscale modeling framework, the influences of curing age and freeze–thaw cycles of UHPC materials are further taken into account. The proposed multiscale simulation scheme integrated with the x-ray CT techniques and cohesive-zone model can serve as an effective and reliable method to capture the nonlinear tensile responses of UHPC materials and structures.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"122 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143841838","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 : 2025-04-17DOI: 10.1177/10567895251329943
David Leonardo Nascimento de Figueiredo Amorim, Sergio Persival Baroncini Proença, Julio Flórez-López
This paper proposes a procedure for analyzing crack propagation in complex structures based on lumped damage mechanics. This theory combines the concept of a plastic hinge with the procedures of damage and fracture mechanics. Models of damage for monotonic loading and high-cycle fatigue are proposed. The paper also describes the numerical implementation of the models in conventional finite-element programs. The models are validated by comparison with experimental results and classic fracture mechanics analyses. It is shown that the model can be used in multi-scale schemes for the structural assessment of structures in civil, offshore, and aeronautical engineering. Therefore, the proposed model might be useful as a macro-modeling step in multi-scale analysis, as well as a tool for preliminary analysis of structures under fatigue loads.
{"title":"Formulation for the matrix analysis of frame structures including fracture mechanics concepts: Applications in tunnel linings and airplane fuselage panels","authors":"David Leonardo Nascimento de Figueiredo Amorim, Sergio Persival Baroncini Proença, Julio Flórez-López","doi":"10.1177/10567895251329943","DOIUrl":"https://doi.org/10.1177/10567895251329943","url":null,"abstract":"This paper proposes a procedure for analyzing crack propagation in complex structures based on lumped damage mechanics. This theory combines the concept of a plastic hinge with the procedures of damage and fracture mechanics. Models of damage for monotonic loading and high-cycle fatigue are proposed. The paper also describes the numerical implementation of the models in conventional finite-element programs. The models are validated by comparison with experimental results and classic fracture mechanics analyses. It is shown that the model can be used in multi-scale schemes for the structural assessment of structures in civil, offshore, and aeronautical engineering. Therefore, the proposed model might be useful as a macro-modeling step in multi-scale analysis, as well as a tool for preliminary analysis of structures under fatigue loads.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"122 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143841837","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 : 2025-04-17DOI: 10.1177/10567895251331310
Haotian Sun, Diqing Fan, Xintian Liu, Jiazhi Liu, Haiyan Ge
Accurate prediction of the fatigue life of API X65 steel is crucial in various applications. However, the traditional bootstrap method has inherent limitations, such as a tendency to deviate from the true distribution with insufficient sample sizes, difficulty in identifying extreme statistics, and an inability to generate distributions closer to the original sample. These deficiencies lead to overly conservative S-N curve designs and pose challenges in data collection, particularly for small samples. To address these issues, we propose an improved bootstrap method using a composite probability distribution. This method enhances the sampling range and improves prediction accuracy for parameter uncertainty ranges by considering both small samples and extended virtual samples’ probability distribution. Comparative analysis through Monte Carlo simulation demonstrates the superior parameter estimation of our method for small samples. Our case analysis further explores the relationships between Vickers hardness, tensile strength, surface roughness factor, and intercept constant. The findings led to a novel method for estimating the S-N curve confidence interval of API X65 steel from Vickers hardness. Analysis of fatigue life test data for API X65 steel yielded favorable results, confirming the effectiveness and feasibility of our improved method.
{"title":"Composite probability distribution for fatigue life prediction of API X65 steel via Vickers hardness","authors":"Haotian Sun, Diqing Fan, Xintian Liu, Jiazhi Liu, Haiyan Ge","doi":"10.1177/10567895251331310","DOIUrl":"https://doi.org/10.1177/10567895251331310","url":null,"abstract":"Accurate prediction of the fatigue life of API X65 steel is crucial in various applications. However, the traditional bootstrap method has inherent limitations, such as a tendency to deviate from the true distribution with insufficient sample sizes, difficulty in identifying extreme statistics, and an inability to generate distributions closer to the original sample. These deficiencies lead to overly conservative S-N curve designs and pose challenges in data collection, particularly for small samples. To address these issues, we propose an improved bootstrap method using a composite probability distribution. This method enhances the sampling range and improves prediction accuracy for parameter uncertainty ranges by considering both small samples and extended virtual samples’ probability distribution. Comparative analysis through Monte Carlo simulation demonstrates the superior parameter estimation of our method for small samples. Our case analysis further explores the relationships between Vickers hardness, tensile strength, surface roughness factor, and intercept constant. The findings led to a novel method for estimating the S-N curve confidence interval of API X65 steel from Vickers hardness. Analysis of fatigue life test data for API X65 steel yielded favorable results, confirming the effectiveness and feasibility of our improved method.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"17 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143841835","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 : 2025-04-11DOI: 10.1177/10567895251321374
Xingling Luo, Xinrui Huang, Konstantinos P Baxevanakis, Phani S Karamched, Vadim V Silberschmidt
Compacted graphite iron (CGI) is widely used in automotive engines thanks to its excellent castability and thermal conductivity. Despite extensive research, the influence of its microstructure on the fracture behaviour has not been fully elucidated. In this work, four different damage models with realistic and simplified morphologies are compared. The developed models consider the effect of graphite-particle morphology and the domain’s boundary conditions. The crack path and morphology were characterised with in situ tensile tests inside a scanning electron microscope. Then, finite-element models capturing the actual microstructure morphology were generated, assuming isotropic and ductile properties for the matrix and graphite. Crack initiation was simulated employing the Johnson-Cook damage scheme and cohesive-zone elements. It was found that cracks tended to initiate at the ends of vermicular graphite particles. Besides, small matrix bridges between the neighbouring graphite inclusions facilitated the concentration of high stress, with its level increasing as the spacing decreased. Validation of simulations was based on in situ experimental data. The developed model could assist in the understanding of the mechanical and fracture behaviours of CGI.
{"title":"Damage-based initiation and growth of cracks in compacted graphite iron: Comparison of numerical strategies for realistic morphology","authors":"Xingling Luo, Xinrui Huang, Konstantinos P Baxevanakis, Phani S Karamched, Vadim V Silberschmidt","doi":"10.1177/10567895251321374","DOIUrl":"https://doi.org/10.1177/10567895251321374","url":null,"abstract":"Compacted graphite iron (CGI) is widely used in automotive engines thanks to its excellent castability and thermal conductivity. Despite extensive research, the influence of its microstructure on the fracture behaviour has not been fully elucidated. In this work, four different damage models with realistic and simplified morphologies are compared. The developed models consider the effect of graphite-particle morphology and the domain’s boundary conditions. The crack path and morphology were characterised with in situ tensile tests inside a scanning electron microscope. Then, finite-element models capturing the actual microstructure morphology were generated, assuming isotropic and ductile properties for the matrix and graphite. Crack initiation was simulated employing the Johnson-Cook damage scheme and cohesive-zone elements. It was found that cracks tended to initiate at the ends of vermicular graphite particles. Besides, small matrix bridges between the neighbouring graphite inclusions facilitated the concentration of high stress, with its level increasing as the spacing decreased. Validation of simulations was based on in situ experimental data. The developed model could assist in the understanding of the mechanical and fracture behaviours of CGI.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"34 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143823026","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 : 2025-03-13DOI: 10.1177/10567895251324655
Jordan Berton, Fabien Coussa, Julien Berthe, Eric Deletombe, Mathias Brieu
This study explores the effects of strain rate on the irreversible deformation and damage evolution in carbon fiber reinforced polymers (CFRPs) during dynamic tensile loading. Experiments conducted on T700/M21 CFRP specimens at varying strain rates (10 −4 to 1 m.s −1 ) indicate that macroscopic irreversible deformation is invariant with strain rate, while viscoelasticity significantly influences the material’s nonlinear behavior. By differentiating between reversible and irreversible strains, we find that damage accumulation does not exhibit a clear strain rate dependency, contrary to some existing literature. This work emphasizes the need for advanced analysis techniques beyond macroscopic observations to fully understand the complex, rate-dependent mechanisms governing CFRP behavior under dynamic conditions.
{"title":"Investigation of strain rate effects on the irreversible and damageable behavior of carbon fiber reinforced polymers under dynamic loading","authors":"Jordan Berton, Fabien Coussa, Julien Berthe, Eric Deletombe, Mathias Brieu","doi":"10.1177/10567895251324655","DOIUrl":"https://doi.org/10.1177/10567895251324655","url":null,"abstract":"This study explores the effects of strain rate on the irreversible deformation and damage evolution in carbon fiber reinforced polymers (CFRPs) during dynamic tensile loading. Experiments conducted on T700/M21 CFRP specimens at varying strain rates (10 <jats:sup>−4</jats:sup> to 1 m.s <jats:sup>−1</jats:sup> ) indicate that macroscopic irreversible deformation is invariant with strain rate, while viscoelasticity significantly influences the material’s nonlinear behavior. By differentiating between reversible and irreversible strains, we find that damage accumulation does not exhibit a clear strain rate dependency, contrary to some existing literature. This work emphasizes the need for advanced analysis techniques beyond macroscopic observations to fully understand the complex, rate-dependent mechanisms governing CFRP behavior under dynamic conditions.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"27 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143618738","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 : 2025-03-04DOI: 10.1177/10567895251324595
Armin Raiesi, Mahsa Kharazi
In this paper, a new thermodynamically consistent model is presented for predicting the elastoplastic-damage behavior of ductile materials using the ordinary state-based peridynamic theory. The innovative idea of this paper lies in the definition of a damage variable for each material point to simulate deterioration. By coupling the newly defined damage variable with the elastoplastic formulation, the presented peridynamic model is capable of demonstrating the initiation and evolution of damage in ductile materials subjected to cyclic loading. In this paper, the consideration of damage is based on phenomenological aspects. To capture this phenomenon, suitable state variables and corresponding thermodynamical forces are defined and isotropic and kinematic hardenings are incorporated based on the equivalent plastic stretch. By defining a dissipation potential that adheres to the requirements of the second law of thermodynamics, the presented peridynamic constitutive model achieves its purpose and the evolution laws for internal variables are derived from the defined dissipation potential. The numerical results, obtained through the employed integration algorithm, demonstrate that the presented peridynamic elastoplastic-damage model can accurately predict the initiation and growth of damage. Furthermore, the model exhibits the capability to simulate the behavior of low cycle fatigue and accurately predict material fatigue failure.
{"title":"An elastoplastic-damage model based on nonlocal peridynamic theory for ductile damage analysis under cyclic loading","authors":"Armin Raiesi, Mahsa Kharazi","doi":"10.1177/10567895251324595","DOIUrl":"https://doi.org/10.1177/10567895251324595","url":null,"abstract":"In this paper, a new thermodynamically consistent model is presented for predicting the elastoplastic-damage behavior of ductile materials using the ordinary state-based peridynamic theory. The innovative idea of this paper lies in the definition of a damage variable for each material point to simulate deterioration. By coupling the newly defined damage variable with the elastoplastic formulation, the presented peridynamic model is capable of demonstrating the initiation and evolution of damage in ductile materials subjected to cyclic loading. In this paper, the consideration of damage is based on phenomenological aspects. To capture this phenomenon, suitable state variables and corresponding thermodynamical forces are defined and isotropic and kinematic hardenings are incorporated based on the equivalent plastic stretch. By defining a dissipation potential that adheres to the requirements of the second law of thermodynamics, the presented peridynamic constitutive model achieves its purpose and the evolution laws for internal variables are derived from the defined dissipation potential. The numerical results, obtained through the employed integration algorithm, demonstrate that the presented peridynamic elastoplastic-damage model can accurately predict the initiation and growth of damage. Furthermore, the model exhibits the capability to simulate the behavior of low cycle fatigue and accurately predict material fatigue failure.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"30 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143546455","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 : 2025-02-26DOI: 10.1177/10567895251322708
Dongqiao Liu, Yunpeng Guo, Manchao He
This study investigates the damage evolution characteristics throughout the complete deformation process of rocks. The analysis reveals five distinct stages in the stress–strain curves of rocks: elastic recovery, damage retention, damage initiation, damage acceleration, and damage slowdown. To simulate the stress–strain relationship of rocks, a damage model based on logistic equation is proposed. The model is developed using the “elastic modulus method,” derived from the hypothesis of strain equivalence, and experimental data obtained from complete stress–strain curves of marble and quartzite under various confining pressures. The proposed model effectively captures the brittle fracture deformation of rocks under uniaxial compression, as well as the strain softening, brittle–ductile transformation, and strain hardening deformation behaviors of rocks under different confining pressures. It adopts a simple function form with distinct parameters derived from physical characteristics, enabling the description of both pre-peak and post-peak deformation characteristics of rocks. The theoretical results obtained from the model align well with existing experimental findings. The physical significance of the model parameters is discussed in relation to damage evolution and constitutive relations, affirming the rationality of the proposed model. Overall, the proposed model exhibits significant potential for broad application in rock engineering.
{"title":"A unified rock damage constitutive model under different confining pressures","authors":"Dongqiao Liu, Yunpeng Guo, Manchao He","doi":"10.1177/10567895251322708","DOIUrl":"https://doi.org/10.1177/10567895251322708","url":null,"abstract":"This study investigates the damage evolution characteristics throughout the complete deformation process of rocks. The analysis reveals five distinct stages in the stress–strain curves of rocks: elastic recovery, damage retention, damage initiation, damage acceleration, and damage slowdown. To simulate the stress–strain relationship of rocks, a damage model based on logistic equation is proposed. The model is developed using the “elastic modulus method,” derived from the hypothesis of strain equivalence, and experimental data obtained from complete stress–strain curves of marble and quartzite under various confining pressures. The proposed model effectively captures the brittle fracture deformation of rocks under uniaxial compression, as well as the strain softening, brittle–ductile transformation, and strain hardening deformation behaviors of rocks under different confining pressures. It adopts a simple function form with distinct parameters derived from physical characteristics, enabling the description of both pre-peak and post-peak deformation characteristics of rocks. The theoretical results obtained from the model align well with existing experimental findings. The physical significance of the model parameters is discussed in relation to damage evolution and constitutive relations, affirming the rationality of the proposed model. Overall, the proposed model exhibits significant potential for broad application in rock engineering.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"1 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143506912","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 : 2025-02-14DOI: 10.1177/10567895251319408
George Z Voyiadjis, Peter I Kattan
A mathematical formulation incorporating the relationship between the damage tensor, healing tensor, and fabric tensors is presented. This formulation provides for a direct link between the subjects of Damage and Healing Mechanics using Fabric Tensors. A new damage-healing tensor is introduced that is based on the fabric of the material. This new tensor is pivotal in characterizing the micro-structure of the material, especially the distributions of micro-cracks and other micro defects. It is noted that the theory applies to linear elastic materials but can be generalized to other constitutive models incorporating inelastic behavior. As examples, the authors solve three cases, namely those of plane stress, plane strain, and isotropic elasticity. The case of plane stress assumes plane damage and plane healing as will be illustrated in the equations. Similarly, the case of plane strain is also illustrated. The case of isotropic elasticity assumes the presence of isotropic damage and isotropic healing. As an illustration, a numerical example is shown for a certain micro-crack distribution. Finally, experimental results are shown to illustrate the relationship between the fabric tensor parameters and the components of the damage and healing tensors. Finally, the evolution of damage and healing are discussed based on sound thermodynamic principles.
{"title":"Use of fabric tensors in damage and healing mechanics of materials","authors":"George Z Voyiadjis, Peter I Kattan","doi":"10.1177/10567895251319408","DOIUrl":"https://doi.org/10.1177/10567895251319408","url":null,"abstract":"A mathematical formulation incorporating the relationship between the damage tensor, healing tensor, and fabric tensors is presented. This formulation provides for a direct link between the subjects of Damage and Healing Mechanics using Fabric Tensors. A new damage-healing tensor is introduced that is based on the fabric of the material. This new tensor is pivotal in characterizing the micro-structure of the material, especially the distributions of micro-cracks and other micro defects. It is noted that the theory applies to linear elastic materials but can be generalized to other constitutive models incorporating inelastic behavior. As examples, the authors solve three cases, namely those of plane stress, plane strain, and isotropic elasticity. The case of plane stress assumes plane damage and plane healing as will be illustrated in the equations. Similarly, the case of plane strain is also illustrated. The case of isotropic elasticity assumes the presence of isotropic damage and isotropic healing. As an illustration, a numerical example is shown for a certain micro-crack distribution. Finally, experimental results are shown to illustrate the relationship between the fabric tensor parameters and the components of the damage and healing tensors. Finally, the evolution of damage and healing are discussed based on sound thermodynamic principles.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"10 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143417739","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 : 2025-02-10DOI: 10.1177/10567895241305592
Claudio Findeisen, Jörg Hohe
Due to crack bridging effects, ceramic matrix composites (CMCs) have outstanding properties that combine a quasi-ductile material behaviour with the high-temperature properties of ceramics. Combined with their high specific strength, this makes them perfectly suitable for high temperature safety relevant components. In view of the design process of CMC components elaborated continuum damage models are required that most importantly consider their anisotropy and damage deactivation effects in a mechanically and mathematically consistent manner. With respect to their damage effect, most of the existing anisotropic models fail with regard to the damage growth criterion leading to the unphysical effect of an increasing stiffness due to damage. Motivated by the modelling process of initially anisotropic composite materials like CMCs, this paper presents the systematic formulation and validation of a mechanically consistent damage effect model together with crack closure effects.
{"title":"Mechanically consistent continuum damage model for anisotropic composites including damage deactivation","authors":"Claudio Findeisen, Jörg Hohe","doi":"10.1177/10567895241305592","DOIUrl":"https://doi.org/10.1177/10567895241305592","url":null,"abstract":"Due to crack bridging effects, ceramic matrix composites (CMCs) have outstanding properties that combine a quasi-ductile material behaviour with the high-temperature properties of ceramics. Combined with their high specific strength, this makes them perfectly suitable for high temperature safety relevant components. In view of the design process of CMC components elaborated continuum damage models are required that most importantly consider their anisotropy and damage deactivation effects in a mechanically and mathematically consistent manner. With respect to their damage effect, most of the existing anisotropic models fail with regard to the damage growth criterion leading to the unphysical effect of an increasing stiffness due to damage. Motivated by the modelling process of initially anisotropic composite materials like CMCs, this paper presents the systematic formulation and validation of a mechanically consistent damage effect model together with crack closure effects.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"160 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143385607","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 : 2025-02-07DOI: 10.1177/10567895251314676
Jun Li, Xiaoman Feng, Junling Hou, Yaohua Liu, Binglei Wang
The paper investigates the issue of damage in interfacial materials using M-integral. It demonstrates that the integration path of M-integral can cross the material interface. The numerical calculation of M-integral is realized by using domain integral method. The accuracy of the model was verified using analytical solutions. The factors affecting the M-integral of the interfacial material are explored with the help of finite elements. The study explores the effects of elastic modulus ratio, defects, and load on the M-integral, and proposes an equivalent damage calibration method based on the M-integral. The results suggest that once the elastic modulus ratio exceeds a certain threshold, it is no longer the primary factor influencing the M-integral. The equivalent defect for elastic problems is linked to the original defect configuration and elastic modulus ratio, and is independent of the external load. This study is important for calibrating damage levels of interfacial materials, designing for damage tolerance in structures, and assessing integrity.
{"title":"Damage evaluation of interfacial materials based on M-integral","authors":"Jun Li, Xiaoman Feng, Junling Hou, Yaohua Liu, Binglei Wang","doi":"10.1177/10567895251314676","DOIUrl":"https://doi.org/10.1177/10567895251314676","url":null,"abstract":"The paper investigates the issue of damage in interfacial materials using M-integral. It demonstrates that the integration path of M-integral can cross the material interface. The numerical calculation of M-integral is realized by using domain integral method. The accuracy of the model was verified using analytical solutions. The factors affecting the M-integral of the interfacial material are explored with the help of finite elements. The study explores the effects of elastic modulus ratio, defects, and load on the M-integral, and proposes an equivalent damage calibration method based on the M-integral. The results suggest that once the elastic modulus ratio exceeds a certain threshold, it is no longer the primary factor influencing the M-integral. The equivalent defect for elastic problems is linked to the original defect configuration and elastic modulus ratio, and is independent of the external load. This study is important for calibrating damage levels of interfacial materials, designing for damage tolerance in structures, and assessing integrity.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"1 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143258429","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：