International Journal of Damage Mechanics最新文献_第4页

Mechanical properties and acoustic emission characterization of red sandstone with cross-fractures 带交叉裂缝的红砂岩力学特性及声发射表征

IF 4.2 2区工程技术

International Journal of Damage Mechanics Pub Date : 2026-09-03 DOI: 10.1177/10567895261485048

Wang Liu,Cui Wang,Maolin Zhai

{"title":"Mechanical properties and acoustic emission characterization of red sandstone with cross-fractures","authors":"Wang Liu,Cui Wang,Maolin Zhai","doi":"10.1177/10567895261485048","DOIUrl":"https://doi.org/10.1177/10567895261485048","url":null,"abstract":"To investigate the mechanical behavior and responses under loading, energy dissipation, and crack propagation in rocks with cross-fractures, this study prepared rock specimens with varying angles of cross-fractures and conducted uniaxial loading tests combined with acoustic emission monitoring to obtain mechanical parameters and acoustic emission characteristics. The experimental results demonstrate that cross-fractures significantly influence the stress–strain curves and mechanical properties of rocks, particularly at fracture angles of 30° and 60°, where pronounced stress drops and local damage phenomena are observed. Energy analysis demonstrates that the specimen with 90° cross fractures possesses the highest capacity for elastic strain energy accumulation, with a peak value of 58.43 KJ·m −3 , while the 30° fractured specimen exhibits the weakest energy storage capacity, reaching a peak of only 31.20 KJ·m −3 . For the 45° fractured specimen, elastic strain energy accounts for merely 70.49% of the total absorbed energy, indicating more sufficient plastic deformation; more work input from external loading is dissipated in the form of plastic damage. Prior to failure, crack propagation triggers a rapid release of elastic strain energy and a dramatic increase in dissipated energy. The acoustic emission ringing count and spatial location maps of events uncover the propagation process of internal cracks in the rocks, which become more pronounced as the degree of rock damage increases. These findings offer a theoretical foundation for the prediction of engineering disasters associated with fractured rocks in the fields of geology and petrology.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"4 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148894752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical modeling of ductile fracture for high-strength metallic materials with a reformulated bond-level Gurson-type peridynamic model 高强度金属材料韧性断裂的改进黏结级gurson型动力学模型数值模拟

IF 4.2 2区工程技术

International Journal of Damage Mechanics Pub Date : 2026-09-03 DOI: 10.1177/10567895261484321

Liwei Wu,Han Wang,Jianfeng Zhou,Junbin Guo,Chunlei Shao

{"title":"Numerical modeling of ductile fracture for high-strength metallic materials with a reformulated bond-level Gurson-type peridynamic model","authors":"Liwei Wu,Han Wang,Jianfeng Zhou,Junbin Guo,Chunlei Shao","doi":"10.1177/10567895261484321","DOIUrl":"https://doi.org/10.1177/10567895261484321","url":null,"abstract":"This study presents a reformulated Gurson-type peridynamic model for the numerical simulation of ductile fracture in high-strength metallic materials. The approach is built within a non-ordinary state-based peridynamics framework and tightly couples the Gurson–Tvergaard–Needleman (GTN) model at the bond level. Specifically, the proposed model directly couples porosity-driven softening with bond degradation based on microscopic damage mechanisms. Then, void-controlled plasticity is embedded into peridynamics, and a bond-level two-way coupling between yield behavior and damage is achieved. Meanwhile, the fracture criterion based on the GTN void volume fraction is established as well, effectively connecting the evolution of microscopic damage with macroscopic fracture behavior, from cavity initiation and growth to crack initiation and propagation. The methodology is validated against several typical examples, illustrating its effectiveness and capacity for tensile, shear, compressive, and impact problems. Overall, the proposed model offers a numerically unified and stable framework for ductile fracture in high-strength metals across diverse stress states and dynamic loading scenarios.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"28 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148894750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hygroscopic multi-scale analysis and degradation of bamboo fiber composites 竹纤维复合材料的吸湿性多尺度分析与降解

IF 4.2 2区工程技术

International Journal of Damage Mechanics Pub Date : 2026-09-03 DOI: 10.1177/10567895261484778

Mouad Chakkour,Mohamed Ould Moussa,Ismail Khay,Tarak Ben Zineb

{"title":"Hygroscopic multi-scale analysis and degradation of bamboo fiber composites","authors":"Mouad Chakkour,Mohamed Ould Moussa,Ismail Khay,Tarak Ben Zineb","doi":"10.1177/10567895261484778","DOIUrl":"https://doi.org/10.1177/10567895261484778","url":null,"abstract":"This paper addresses the multiscale moisture absorption and degradation of bamboo fiber–epoxy composites with different fiber fractions (20, 30, and 40 wt.%). The equilibrium moisture absorption of composites has been studied at different relative humidities (30%, 65%, and 80%) using a multiscale homogenization method. The findings reveal that the overall macroscopic property does not obey the classical law of mixtures, which is attributed to the hygro-mechanical coupling arising from the matrix-induced confinement effect. This response is strongly governed by both fiber fraction and humidity levels. The results indicate that the classical Fick model is sufficient to describe the experimental moisture uptake. Interestingly, the predicted hygroscopic stress distributions reveal increasing tensile and compressive stress levels with fiber content, driven by the combined effects of moisture concentration gradients and enhanced hygroscopic expansion. Herein, compressive stress reaches 46.46, 66.91, and 105 MPa in the surface regions during the transient regime for 20, 30, and 40 wt.% fiber composites, suggesting an increased risk of damage initiation even without adding external loads, respectively. More importantly, good retention of the tensile properties is noticed for 20 and 30 wt.% fiber composites after exposure to wet–dry aging, suggesting that fiber expansion and leaching are the dominant mechanisms. However, microstructural damage and active hydrolysis reactions drive the recovery at 40 wt.% fiber fractions. The damage parameter used to reflect the loss of tensile strength reaches values of 0.034, 0.054, and 0.169 at 20, 30, and 40 wt.% fiber fractions, indicating progressive damage with increasing fiber content, respectively.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"27 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148894751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A multiscale impact damage assessment framework for layered structures with application to solid oxide fuel cells 层状结构多尺度冲击损伤评估框架及其在固体氧化物燃料电池中的应用

IF 4.2 2区工程技术

International Journal of Damage Mechanics Pub Date : 2026-09-01 DOI: 10.1177/10567895261481312

Xu Han, Jing Cao, Kun Cai, Qing-Hua Qin

{"title":"A multiscale impact damage assessment framework for layered structures with application to solid oxide fuel cells","authors":"Xu Han, Jing Cao, Kun Cai, Qing-Hua Qin","doi":"10.1177/10567895261481312","DOIUrl":"https://doi.org/10.1177/10567895261481312","url":null,"abstract":"Impact-induced damage in layered structures remains a long-standing challenge in solid mechanics, primarily due to the complex propagation of stress waves across multiple heterogeneous interfaces. Solid oxide fuel cell (SOFC) stacks, as representative layered systems, are particularly vulnerable to core crushing when subjected to severe impact loading in extreme environments. Such damage can result in output voltage degradation and compromise the operational stability of SOFC-supported systems. To efficiently evaluate impact resistance and output voltage stability, this study proposes a multiscale numerical framework for assessing the ultimate load-bearing capacity of SOFC stacks under impact loads. The clamped stack is first homogenized into an equivalent continuum, which significantly enhances computational efficiency. Subsequently, a constitutive model capturing elastic–plastic behavior and dynamic structural failure is developed to predict damage evolution under impact conditions. Validation against the original full-scale detailed model demonstrates that the proposed framework achieves high accuracy while substantially reducing computational cost. This efficiency arises from the layer-number independence of the approach: constitutive parameters calibrated using a reduced-layer stack can be directly applied to full-scale stacks without further modification. Overall, the proposed framework provides an effective analytical tool for evaluating the ultimate load-bearing capacity and functional reliability of SOFC stacks subjected to impact loading.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"13 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148877250","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Insight into cracking mechanisms between two parallel flaws: A systematic clarification of crack coalescence types 洞察裂纹机制之间的两个平行缺陷：裂纹合并类型的系统澄清

IF 4.2 2区工程技术

International Journal of Damage Mechanics Pub Date : 2026-08-31 DOI: 10.1177/10567895261481683

Han Zhang, Xiaoping Zhang, Jingke Lu, Shunchuan Wu

{"title":"Insight into cracking mechanisms between two parallel flaws: A systematic clarification of crack coalescence types","authors":"Han Zhang, Xiaoping Zhang, Jingke Lu, Shunchuan Wu","doi":"10.1177/10567895261481683","DOIUrl":"https://doi.org/10.1177/10567895261481683","url":null,"abstract":"The coalescence behavior of flaws critically governs rock mass stability. Despite established coalescence classification systems, ambiguities in the mechanisms of morphologically similar crack trajectories and limitations in universality and accuracy persist. To address these issues, the present study employed the bonded particle model to generate a comprehensive range of flaw geometries with fine incremental steps and simulate the coalescence process between parallel flaws under uniaxial compression. By tracking the dynamic evolution of force chains and displacement fields, the physical origin of the long-unexplained compression-induced tensile (CIT) crack is identified. Findings reveal that CIT cracks are driven by the accumulation of nested tensile contact forces within dominant compressive forces; the confinement effect within the rock bridge leads to delayed but abrupt energy release, resulting in sudden internal failure. Furthermore, the present study deciphers the divergent mechanical mechanisms underlying various coalescence patterns in overlapping and stepping geometries, resolving controversies where identical crack morphologies arise from distinct stress states. Additionally, results demonstrate that coalescence patterns are governed not only by macroscopic flaw geometry, but also by stress heterogeneity induced by random particle distribution and dynamic stress redistribution during crack propagation. These insights facilitate a refinement of Wong’s classification system that prioritizes mechanical criteria over geometric morphology. Ultimately, this mechanism-driven framework eliminates previous observational ambiguities, establishing a robust foundation for predicting the failure behavior and stability of jointed rock masses.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"62 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148877334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Velocity characteristics of shock wave front in ambient air induced by nanosecond pulsed laser irradiation on aluminum 纳秒脉冲激光辐照铝的冲击波锋面速度特性

IF 4.2 2区工程技术

International Journal of Damage Mechanics Pub Date : 2026-08-31 DOI: 10.1177/10567895261478700

Changli Li, Kehao Hao, Yaode Wang, Chang Liu, Dongrui Li

{"title":"Velocity characteristics of shock wave front in ambient air induced by nanosecond pulsed laser irradiation on aluminum","authors":"Changli Li, Kehao Hao, Yaode Wang, Chang Liu, Dongrui Li","doi":"10.1177/10567895261478700","DOIUrl":"https://doi.org/10.1177/10567895261478700","url":null,"abstract":"A mathematical model of laser-induced phase explosion (LIPE) is established using the finite element method. The main physical processes, including liquid-phase superheating, homogeneous nucleation, and phase explosion (PE), are numerically simulated by coupling temperature and velocity fields. The aluminum target's ablation process, evolving from normal evaporation to superheating and eventually PE, is systematically investigated. A multiwavelength high-speed shadow imaging system captures the ambient air shock wave front (SWF) generated by short pulsed laser (SPL) irradiation to analyze its propagation velocity. Results indicate that the surface temperature rapidly decreases after briefly maintaining a peak of ∼6350 K (0.95Tc), dominated by strong convection of explosion products. With increased laser fluence, LIPE occurrence is advanced and its duration prolonged. Axial temperature distributions reveal PE occurs deeper inside the target, increasing the ablation penetration depth. Far from the surface, the air-borne SWF propagation velocity decays rapidly. This work provides theoretical support for investigating LIPE mechanisms and optimizing laser processing efficiency.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"14 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148858725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Material-aware rapid prediction of low-velocity impact damage in laminated composites via surrogate modeling 基于代理模型的层合复合材料低速冲击损伤材料感知快速预测

IF 4.2 2区工程技术

International Journal of Damage Mechanics Pub Date : 2026-08-28 DOI: 10.1177/10567895261481684

Dazhi Zhao, Yinglong Liu, Yujie Xiang, Peng Zhang, Xianqiao Wang, Keke Tang

{"title":"Material-aware rapid prediction of low-velocity impact damage in laminated composites via surrogate modeling","authors":"Dazhi Zhao, Yinglong Liu, Yujie Xiang, Peng Zhang, Xianqiao Wang, Keke Tang","doi":"10.1177/10567895261481684","DOIUrl":"https://doi.org/10.1177/10567895261481684","url":null,"abstract":"Low-velocity impact (LVI) can leave laminated composites with internal damage that is difficult to observe visually but may still degrade structural integrity. Finite-element simulation can resolve such damage fields, yet repeated case-specific analyses become costly when impact direction, ply orientation, stacking sequence, and material system vary together. Existing surrogate models often treat material information as a simple label and may overlook low-intensity regions in finite-element-generated fiber damage fields. This study develops a material-aware surrogate framework for rapid prediction of finite-element-generated fiber damage fields. The framework learns compact representations of damage images and maps physical parameters, including impact angles, ply position, ply orientation, and material type, to fiber tensile and fiber compressive damage fields. Validation shows that the model preserves global damage morphology, captures fiber orientation-induced rotation, represents symmetry loss under oblique impact, and adjusts damage intensity across material systems under the controlled lay-up setting considered in this work. With an inference time of approximately 5 ms, the framework provides a fast alternative to repeated finite-element analysis for preliminary impact damage evaluation and design screening.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"8 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148836269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Behaviors of damaged GFRP-confined concrete columns subjected to eccentric compression 受损gfrp约束混凝土柱偏心受压性能研究

IF 4.2 2区工程技术

International Journal of Damage Mechanics Pub Date : 2026-08-28 DOI: 10.1177/10567895261472699

Qingping Jin, Jinfeng Fan, Dian Zhou, Aihua Du, Zhenyuan Yang

{"title":"Behaviors of damaged GFRP-confined concrete columns subjected to eccentric compression","authors":"Qingping Jin, Jinfeng Fan, Dian Zhou, Aihua Du, Zhenyuan Yang","doi":"10.1177/10567895261472699","DOIUrl":"https://doi.org/10.1177/10567895261472699","url":null,"abstract":"To investigate the mechanical response of a concrete-filled glass fiber-reinforced polymer (GFRP) tube with initial damage under eccentric compression, a total of 21 specimen types were designed and fabricated, incorporating slenderness ratio, eccentricity, damage length, and damage location as variable parameters. Static eccentric compression loading tests were performed. A comprehensive comparative study was undertaken focusing on the mechanisms of damage nucleation and evolution, load–displacement curves, and the variation patterns of ultimate load-bearing capacity. Additionally, the ultimate load-bearing capacity of GFRP-confined concrete columns with initial damage was calculated. The findings reveal that damage on the compression side is particularly detrimental, exerting a substantially greater adverse effect than damage on the tension side. Stress concentration at the damage tip initiates the propagation of complex cracks, forming plastic hinges and altering the stress transfer path. Despite the damage, the internal concrete retains partial confinement through the arching effect. The presented study introduces reduction coefficients for slenderness ratio and eccentricity, resulting in a formula for predicting the ultimate load-bearing capacity of GFRP-confined concrete columns, considering the influence of damage location on strength. The calculated results are generally consistent with the experimental results.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"17 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148836271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental investigation on damage and seepage characteristics of layered slate under cyclic loading and unloading of stress 循环加卸载应力作用下层状板岩损伤与渗流特性试验研究

IF 4.2 2区工程技术

International Journal of Damage Mechanics Pub Date : 2026-08-28 DOI: 10.1177/10567895261477813

Haopeng Jiang, Hui Wang, Wei Yin, Fengrui Zhang

{"title":"Experimental investigation on damage and seepage characteristics of layered slate under cyclic loading and unloading of stress","authors":"Haopeng Jiang, Hui Wang, Wei Yin, Fengrui Zhang","doi":"10.1177/10567895261477813","DOIUrl":"https://doi.org/10.1177/10567895261477813","url":null,"abstract":"To investigate the damage deterioration and seepage evolution of bedded slate under cyclic axial loading–unloading, triaxial tests were conducted on specimens with bedding angles of 0°, 30°, 45°, 60° and 90° under 10 MPa confining pressure and 5 MPa pore pressure. The study systematically analyzed the influence of bedding structure on rock strength, deformation, damage accumulation, and permeability. Consequently, a damage constitutive model and a permeability evolution model were developed, incorporating bedding angle, cyclic fatigue, loading path, and effective stress. Results indicate that bedded slate exhibits pronounced nonlinear deformation, hysteresis, and stiffness degradation under cyclic loading, with responses strongly dependent on bedding angle. Peak strength follows a “U-shaped” distribution, where specimens near 45° show the greatest damage due to combined shear-tensile failure along bedding planes. Permeability initially decreases due to fracture compaction but subsequently increases as stress exceeds the historical maximum, facilitating fracture interconnection. This evolution shows distinct anisotropy; intermediate bedding angles promote more efficient seepage channel formation, leading to larger permeability increments. The proposed models accurately reproduce the experimental stress–strain and permeability behaviors across different angles. These findings provide a theoretical framework for stability analysis and seepage hazard mitigation in stratified rock masses subjected to cyclic disturbances and fluid flow.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"27 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148836270","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mesh mapping-based mesoscale modeling and shear performance analysis of recycled aggregate concrete beams 基于网格映射的再生骨料混凝土梁细观模型及抗剪性能分析

IF 4.2 2区工程技术

International Journal of Damage Mechanics Pub Date : 2026-08-26 DOI: 10.1177/10567895261479095

Dong Li, Xin Lin, Chenyang Zhang, Renbo Zhang, Liu Jin, Xiuli Du

{"title":"Mesh mapping-based mesoscale modeling and shear performance analysis of recycled aggregate concrete beams","authors":"Dong Li, Xin Lin, Chenyang Zhang, Renbo Zhang, Liu Jin, Xiuli Du","doi":"10.1177/10567895261479095","DOIUrl":"https://doi.org/10.1177/10567895261479095","url":null,"abstract":"This article proposes a three-dimensional mesoscale modeling framework based on mesh mapping technology. Going beyond the traditional three-phase simplification, recycled aggregate is resolved into a multilayered “old natural aggregate—old interfacial transition zone (ITZ)—attached old mortar” system. By integrating random aggregate placement with automated rebar generation algorithms, efficient collaborative modeling of aggregates, mortars, multiple ITZs, and reinforcement is achieved within a uniform hexahedral background mesh. Material phases are automatically identified and assigned based on node-to-aggregate spatial inclusion criteria. The modeling process is highly efficient under typical mesh sizes, completing within seconds to tens of seconds. The framework is validated against four-point bending tests on beams without stirrups, followed by systematic parametric analyses on replacement ratio and mesocomponent properties. Results reveal that: first, ITZ properties—particularly the internal old ITZ (ITZ3)—are the dominant factor governing shear behavior. Second, strengthening the attached old mortar significantly enhances both load-bearing and deformation capacities, but the improvement saturates once its strength exceeds that of the new mortar. Third, the elastic modulus of natural aggregate exerts only marginal influence on macroscopic shear performance. The proposed method achieves a favorable balance among modeling efficiency, geometric fidelity, and reinforcement compatibility, offering an extensible and practical tool for mesoscale analysis of recycled aggregate concrete members.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"60 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148821194","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0