International Journal of Damage Mechanics最新文献

{"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}

{"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}

{"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}

{"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}

{"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}

{"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}

{"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}

{"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}

{"title":"Damage and permeability of gassy coal in loading – Unloading path","authors":"Qiuping Li, Jie Liu, Hao Wang","doi":"10.1177/10567895241313243","DOIUrl":"https://doi.org/10.1177/10567895241313243","url":null,"abstract":"To effectively prevent dynamic gas disasters, the adding vertical and unloading radial stress were investigated in laboratory and numerical simulation experiments. The objective about the research was to ascertain how various gas pressures and loading rates affected permeability and damage deformation. The results conclude that shear failure predominates in gassy coal, a rise in loading rate causes the permeability to mutate more slowly, and the plastic strain gradually decreases at the yield, peak, and post-peak stable points in gassy coal. As well, a rise in gas pressure causes an earlier transition from compression to expansion state of specimens, enhances permeability, and rises the plastic strain at specified points. Furthermore, the study focuses on the meso-scale failure and permeability characteristics. During failure, the seepage channel within the coal body gradually transitions from a vertical orientation to irregular deformation. In addition, a damage model is formulated centered around energy consumption, demonstrating that damage evolution curves exhibit an ‘ S’ shape with vertical strain. Meanwhile, higher axial loading rates delay the onset of unstable crack propagation, but raising gas pressure quickens the pace of damage to specimens. The conclusions of this research hold significant practical implications for mitigating coal-rock gas dynamic disasters.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"46 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142992031","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}

{"title":"Study on mechanical properties and strength criterion of mudstone under loading and unloading considering pre-peak damage","authors":"Hui Qin, Hua Tang, Xiaotao Yin, Xu Cheng, Shengping Tang","doi":"10.1177/10567895241297327","DOIUrl":"https://doi.org/10.1177/10567895241297327","url":null,"abstract":"In the highway construction of the southwestern Transverse Mountain area of China, mass mudstone engineering disasters have occurred, primarily attributed to engineering disturbances and water-rock interaction. Engineering disturbances commonly lead to varying degrees of pre-peak damage. To elucidate the evolutionary laws of strength in pre-peak damaged mudstone, we first defined the pre-peak damage variable ( D<jats:sub>a</jats:sub>) for mudstone, and through triaxial loading and unloading tests, obtained the mechanical characteristics of pre-peak damaged mudstone, analyzing its brittle properties from an energy perspective. Subsequently, through scanning electron microscopy tests, we analyzed the microstructural features to reveal the failure mechanism. Finally, the damage ratio strength theory (DR) was introduced to characterize the strength of the mudstone and validate the suitability of the DR. The results demonstrate that: (1) Mudstone with pre-peak damage exhibits a significant weakening effect due to water-rock interaction, with a maximum reduction in peak strength of approximately 28%. Compared to the loading stress path (LSP), the overall strength of the mudstone is lower under the unloading stress path (ULSP), and the deformation modulus decreases more significantly with D<jats:sub>a</jats:sub> under the ULSP. (2) Both the D<jats:sub>a</jats:sub>and confining pressure contribute to a decrease in the brittleness index of the mudstone. Under the ULSP, the mudstone is more prone to brittle failure. (3) The development of micro-cracks in pre-peak damaged mudstone makes it more susceptible to water infiltration, exacerbating the deteriorating effect of water-rock interaction, thus affecting its mechanical properties. (4) The DR can effectively characterize the strength of pre-peak damaged mudstone. The Damage Ratio (ν <jats:sub>D,c</jats:sub>) of mudstone under the LSP is in the range of 1.07∼1.50, and under the ULSP is in the range of 1.11∼1.52. The ν <jats:sub>D,c</jats:sub> under the LSP is smaller than under the ULSP, decreases with the D<jats:sub>a</jats:sub>, and exhibits plastic deformation, indicating that the DR can simultaneously characterize the strength and brittleness of the mudstone. The research results can provide guidance for the design parameters and disaster prevention of disturbed mudstone engineering.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"12 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142936733","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}