{"title":"Quantification of the creep, fatigue, and oxidation damage and life prediction","authors":"Neha Mehani, Samir Chandra Roy","doi":"10.1177/10567895261490214","DOIUrl":"https://doi.org/10.1177/10567895261490214","url":null,"abstract":"Materials at high temperatures may undergo damage due to the interaction of creep, fatigue, and oxidation. Since the last decade, many methods have been developed to predict the life of the materials under creep–fatigue interaction (CFI) loading. However, oxidation damage is very rarely considered in such prediction models. Moreover, most of the methods available in the literature use a lot of testing and data acquisition from pure fatigue, creep–fatigue, and pure creep tests. To overcome these difficulties, this article investigates the tensile hysteresis strain energy density method (THSED) available in the open literature. A modified THSED method that takes into account oxidation damage is proposed and implemented with four different materials for uniaxial CFI and hybrid CFI loading conditions. The proposed method could predict the CFI life of 304 SS, 304L SS, Mod. 9Cr-1Mo steel, and P92 steel within a scatter factor of ±2.0. The model parameter ( <jats:italic toggle=\"yes\">γ</jats:italic> ), determined by the hit-and-trial method in the existing THSED method, is found to be dependent on the oxidation damage, strain rate, and hold time. The analytical expressions for the estimation of THSED for uniaxial and hybrid CFI loading conditions have also been derived.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"30 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149043589","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}
Minel Ahu Kara Alaşalvar, Özlem Sağıroğlu Demirci, Özgür Anıl, Sercan Tuna Akkaya, Alper Çelik, Yaşar Erbaş, Ömer Mercimek
{"title":"Axial performance and failure analysis of repaired historic timber columns using carbon fiber-reinforced polymer and steel bolts","authors":"Minel Ahu Kara Alaşalvar, Özlem Sağıroğlu Demirci, Özgür Anıl, Sercan Tuna Akkaya, Alper Çelik, Yaşar Erbaş, Ömer Mercimek","doi":"10.1177/10567895261490260","DOIUrl":"https://doi.org/10.1177/10567895261490260","url":null,"abstract":"The preservation of historic timber structures is essential for cultural heritage conservation; however, structural degradation often necessitates reinforcement interventions. This study experimentally evaluates traditional bolted connections and modern carbon fiber-reinforced polymer (CFRP) reinforcement techniques for deteriorated timber columns obtained from three historic buildings. The experimental program consisted of 12 strengthened specimens and three reference specimens, in which damaged sections were replaced with new chestnut wood and reinforced using bolts (two, four, or six bolts) or CFRP layers (one, two, or three layers). Axial compression tests and digital image correlation analysis were conducted to assess load-bearing capacity, stiffness, energy dissipation capacity, and failure mechanisms. The results showed that, although both strengthening techniques improved structural performance, neither was able to fully restore the capacity of the intact specimens. Bolted connections enhanced stiffness but induced stress concentrations, whereas CFRP reinforcement improved ductility while exhibiting limitations related to interfacial adhesion. The findings highlight the challenges associated with preserving historic timber elements and provide valuable insights into the effectiveness of strengthening techniques as sustainable and minimally invasive strategies for the structural rehabilitation of heritage timber structures.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"56 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149043594","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":"Microwave-induced damage evolution in concrete under electromagnetic-thermo-mechanical coupling effects","authors":"Xingwang Chen, Wei Wei, Zhenyang Zong, Zhushan Shao, Rujia Qiao","doi":"10.1177/10567895261484784","DOIUrl":"https://doi.org/10.1177/10567895261484784","url":null,"abstract":"In this article, a numerical simulation of the electromagnetic-thermo-mechanical-damage coupling effects of concrete damage under microwave irradiation was conducted. The variation and evolution of electromagnetic and temperature fields were analyzed firstly. Then, the mechanical-damage coupling analysis was performed to further investigate the distribution of internal stress and damage evolution mechanisms in the concrete. The results indicated that the dielectric properties of aggregate contribute to the significantly high electromagnetic losses, leading to rapid heating of aggregate and the formation of a temperature gradient at the aggregate–mortar interface. Under the combined effect of the temperature gradient and thermal stress, the stress concentration at the interface was more obvious, identifying it as the critical region for damage initiation and propagation. Furthermore, electromagnetic and temperature field uniformity are the core factors determining the aggregate–mortar separation efficiency; under 4 kW microwave irradiation, the overall stripping rate reaches 25.4%, whereas it exceeds 35.4% in the high electromagnetic field strength region. These findings indicate the mechanism of microwave-induced concrete fracturing and suggest the importance of optimizing the electromagnetic field distribution.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"226 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149043471","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":"Thermo-induced damage evolution and multi-mode fracture toughness degradation in sandstone: Integrated microstructural quantification and mesoscopic modeling","authors":"Chairul Salam M.","doi":"10.1177/10567895261490356","DOIUrl":"https://doi.org/10.1177/10567895261490356","url":null,"abstract":"Thermo-mechanical degradation in brittle geomaterials is governed by progressive microstructural damage that fundamentally alters fracture resistance. This study presents an integrated experimental–numerical investigation of temperature-dependent damage evolution and multi-mode fracture toughness degradation in quartz-rich sandstone. Specimens were thermally conditioned up to 700 °C and subsequently subjected to uniaxial compression, Brazilian tensile, and semi-circular bending (SCB) tests under Mode I, Mode II, and mixed-mode loading. Microstructural alterations were quantified using high-resolution scanning electron microscopy, enabling direct measurement of microcrack density as an internal damage descriptor. Results reveal a distinct critical thermal threshold within the 400 to 500 °C interval, beyond which microcrack density increases nonlinearly and fracture toughness degrades rapidly across all loading modes. A regression-based damage–fracture coupling model is proposed to relate normalized fracture toughness to the experimentally quantified damage variable. The model exhibits a high coefficient of determination and low prediction error, demonstrating that microcrack density governs fracture resistance degradation in a physically consistent manner. A grain-based particle flow model calibrated against intact mechanical properties was subsequently implemented with damage-informed bond strength reduction. The simulations reproduce crack initiation, propagation patterns, and temperature-dependent toughness decline with strong quantitative agreement. The proposed framework establishes a mechanistically grounded linkage between mineral-scale thermo-induced damage and macroscopic fracture behavior, providing a predictive basis for fracture-controlled stability assessment in thermally disturbed rock masses.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"3 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149021302","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 extended state-based intermediately homogenized peridynamic model for concrete failure analysis considering the ITZ porosity","authors":"Haohao Yang,Heng Zhang,Qinghui Liu,Yijia Dong","doi":"10.1177/10567895261491011","DOIUrl":"https://doi.org/10.1177/10567895261491011","url":null,"abstract":"The interfacial transition zone (ITZ) is inherently a porous region that significantly influences macroscopic mechanical and fracture behaviors of concrete materials. In this study, an extended state-based intermediately homogenized peridynamic model (IH-PD) is proposed for concrete failure analysis considering the ITZ porosity. First, a PD mesoscopic model consisting of mortar and aggregates is established for concrete materials, and the ITZ is implicitly defined by the material interface bonds. An intermediately-homogenized PD model is implemented within the ordinary state-based PD framework, and applied to quantitatively characterize the interfacial porosity. Then, three numerical examples, that is, the wave propagation of a porous glass plate, double cantilever beam test with interfacial porosity, and failure analysis of concrete under uniaxial tension, are investigated for the presented model verification and application. The results indicate that increasing of ITZ porosity leads to a significant reduction in both the responding modulus and critical load. And the cracks primarily propagate along the highly porous ITZ, confirming its role as the weakest link in the mesostructure.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"9 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149021299","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}
Mário Loureiro,Pedro Prates,Bimal Das,Joel de Jesus,Cândida Malça,Ricardo Branco
{"title":"Low-cycle fatigue behaviour of 7075-T651 aluminium alloy: Cyclic deformation and life prediction","authors":"Mário Loureiro,Pedro Prates,Bimal Das,Joel de Jesus,Cândida Malça,Ricardo Branco","doi":"10.1177/10567895261473728","DOIUrl":"https://doi.org/10.1177/10567895261473728","url":null,"abstract":"High-strength aluminium alloys are widely used in aerospace and automotive structures, where fatigue assessments incorporating cyclic plasticity effects are often performed using strain–life approaches. The description of such effects requires advanced plasticity models capable of capturing the cyclic response and predicting damage accumulation. Nevertheless, detailed investigations into the interactions among cyclic plasticity, damage mechanisms and fatigue life prediction under variable-amplitude loading remain challenging due to limited data. Thus, this study investigates the cyclic elasto-plastic behaviour and life prediction of 7075-T651 aluminium alloy under variable-amplitude strain-controlled conditions. An Armstrong–Frederick kinematic hardening model was developed to capture the cyclic elasto-plastic response and replicate the stabilised hysteresis loops, while electron backscatter diffraction and scanning electron microscopy analyses were conducted to understand micro-structural evolution induced by cyclic loading and identify the main micro-mechanisms associated with the applied strain levels. The analysis of the results indicates that the tested alloy exhibited mixed cyclic hardening–softening behaviour, dependent on strain amplitude, and was relatively close to a Masing-type material. The cyclic stress–strain response and the associated fatigue life relationships under constant-amplitude loading, expressed via Basquin–Coffin–Manson (BCM) and Smith–Watson–Topper (SWT) parameters, showed good agreement with the literature results. Fatigue life predictions under variable-amplitude loading were successfully performed using either the BCM or SWT model, each combined with a linear damage accumulation rule. In addition, dislocations were largely confined to grain boundaries in the as-received material, whereas under fatigue loading they extended into grain interiors as well as along the boundaries, accompanied by a significant increase in the geometrically necessary dislocation density.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"36 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149021300","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}
Mu-Yu Guan, Jin-Shui Yang, Ming-Yang Liu, Xu-Chang Liu, Wei-Jing Wang
{"title":"Study on low-velocity impact response and residual strength of scarf-repaired foam-filled lattice composite sandwich panels","authors":"Mu-Yu Guan, Jin-Shui Yang, Ming-Yang Liu, Xu-Chang Liu, Wei-Jing Wang","doi":"10.1177/10567895261477494","DOIUrl":"https://doi.org/10.1177/10567895261477494","url":null,"abstract":"To ensure the structural integrity and safety of composite materials, effective repair methods are essential, particularly for foam-filled lattice composite sandwich panels (FLCSPs) that are commonly used in engineering applications. This study focuses on FLCSPs manufactured using vacuum-assisted resin infusion technology, investigating the scarf repair of impact-damaged FLCSPs. For low-velocity impact and compression after impact tests, three specimen groups, including pristine (undamaged), damaged, and repaired specimens, were designed. Through comparative analysis, the impact response and impact damage of the repaired structures were studied, along with the influence of different impact energies on the impact response and residual compressive strength. The results demonstrate that the maximum impact load of repaired structures can reach more than 90% of that of pristine specimens, while compressive strength can recover to over 85% of the original level, indicating a relatively high recovery level under the present test conditions. In addition, considering the progressive damage mechanism of composite materials, a finite-element model of FLCSPs was established. The numerical model captured the main trends of the impact response and dominant damage modes, providing an engineering-level tool for interpreting the damage and failure mechanisms.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"6 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148979581","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":"Elastoplastic compression constitutive behaviours and damage mechanisms of 3D4D braided FRP at temperatures of 25 °C and 85 °C","authors":"Dong Li, Jun-Jiang Xiong","doi":"10.1177/10567895261488189","DOIUrl":"https://doi.org/10.1177/10567895261488189","url":null,"abstract":"Distinct plastic plateau and nonlinear elastoplastic constitutive behaviours are substantiated in longitudinal and transverse compression tests on 3D4D braided fibre-reinforced polymer (FRP) at temperatures of 25 °C and 85 °C. A new nonlinear constitutive law is derived to depict elastoplastic compression constitutive behaviours of 3D4D braided FRP in view of thermo-mechanical interaction, elastoplastic nature of epoxy resin and nonlinear shear constitutive law of fibre yarn. A novel hybrid failure criterion is devised based on the Hashin, quad damage, von Mises and B-K energy rules for progressive failure modelling of 3D4D braided FRP. An original full-scale high-fidelity mesoscale finite element model is presented to simulate nonlinear elastoplastic compression behaviours and damage mechanisms of 3D4D braided FRP under the aforementioned loading and temperature conditions. Numerical simulations are consistent with experimental results, manifesting the effective and rational use of the proposed model.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"32 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148979576","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 continuum damage mechanics-based approach to study bolt clamping force effect on the fracture strength of a plate containing a fastener hole with symmetrical edge cracks","authors":"Ali Asadyan,TN Chakherlou","doi":"10.1177/10567895261478900","DOIUrl":"https://doi.org/10.1177/10567895261478900","url":null,"abstract":"A numerical investigation is conducted to analyze the clamping force effect on the fracture strength of holed plates with symmetrical edge cracks, made from Al-Alloy7075-T6, subjected to longitudinal tensile load by quasi-brittle damage evolution, and the results were compared with the available experimental tests. The continuum damage mechanics method and finite element method, along with the Chaboche plasticity hardening model coupled with damage mechanics, were employed to capture accurately the material's mechanical behavior. A quasi-brittle fracture approach was investigated by employing a two-scale damage method with meso-scale volume including a micro-scale volume inside it, in which voids and microcracks develop and cause macroscopic fracture. The meso-scaled volume was considered to have elastic-plastic behavior; however, the micro-scale volume was considered to have elastic-plastic behavior coupled with damage. A finite element package was utilized to simulate bolt clamping and applied load to obtain stress and strain distributions on the holed plate, and the damage was calculated in a code written by the authors. The fracture strength of the bolted cracked plate obtained by the simulation and the code is in good agreement with the experimental results, showing two scale quasi-brittle fracture method coupled with damage can predict the fracture strength in cracked members.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"16 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148894748","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":"Integrating geometric effects on the thermomechanical behavior of solder joints using the Q parameter","authors":"Sadegh Mirmehdi,Amir Nourani,Ahmad Assempour","doi":"10.1177/10567895261481682","DOIUrl":"https://doi.org/10.1177/10567895261481682","url":null,"abstract":"Solder joints on printed circuit boards are constantly subjected to thermal loads. These joints come in various geometries, which can significantly affect their thermomechanical behavior. Previous studies focused on clarifying the thermomechanical behavior resulting from geometric changes by qualitatively analyzing the metallurgical microstructure, stress/strain distribution and strain energy within the solder joint. This research aims to quantify the relationship between joint geometry, and damage caused by thermal loading using a specific parameter. A history-dependent cohesive zone model was developed to calculate the dissipated energy ( DE th ) due to thermal cycling in solder joints with different geometries. The obtained DE th values increased from 75.3 to 147.6 J/m 2 for the Arcan-type specimen and from 90 to 191.2 J/m 2 for the DCB-type specimen as the thermal loading range increased from 25–105 °C to 25–165 °C. These results were subsequently correlated through the constraint parameter, Q . By plotting the DE th - Q diagrams for two specific geometries, a unique geometric locus is observed. Additionally, the variation in the calculated Q values with radial distance remained below 10% for all cases, confirming the numerical robustness of the Q evaluation procedure. The findings suggest that the Q parameter effectively quantifies the geometric effects on the thermomechanical behavior of solder joints. The developed DE th - Q methodology provides a unified and geometry-sensitive approach for thermal damage characterization, reliability assessment, and design optimization of solder joints in electronic packaging applications.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"59 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148894749","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}