Pub Date : 2025-09-25DOI: 10.1177/10567895251380244
Suchart Limkatanyu, Worathep Sae-Long, Nattapong Damrongwiriyanupap, Piti Sukontasukkul, Griengsak Kaewkulchai, Hamid M Sedighi, Hexin Zhang
This study proposes a new beam–foundation model for analyzing the static behavior of recycled aggregate concrete (RAC) beam resting on Kerr-type foundations. The novelty of the approach lies in the integration of three distinct damage models—the Voigt parallel model, the Reuss serial model, and the generalized self-consistent model—into a force-based framework. These models are employed to capture stiffness degradation in RAC beams under isotropic and homogeneous conditions, addressing the need for more realistic damage representation in sustainable concrete structures. The Kerr-type foundation model accounts for interaction between the beam and its underlying foundation, while the Euler–Bernoulli beam theory governs the beam's deformation behavior under small displacements. The governing equations are formulated using the virtual force principle. Through a series of numerical simulations, the study investigates how damage mechanisms and system parameters influence the bending response of the RAC beam–foundation system. The results demonstrate that both the type of damage model and foundation characteristics significantly affect the structural stiffness, leading to either softening or stiffening responses.
{"title":"Stiffness degradation analysis of recycled aggregate concrete beam on Kerr-type foundation: Force-based approach","authors":"Suchart Limkatanyu, Worathep Sae-Long, Nattapong Damrongwiriyanupap, Piti Sukontasukkul, Griengsak Kaewkulchai, Hamid M Sedighi, Hexin Zhang","doi":"10.1177/10567895251380244","DOIUrl":"https://doi.org/10.1177/10567895251380244","url":null,"abstract":"This study proposes a new beam–foundation model for analyzing the static behavior of recycled aggregate concrete (RAC) beam resting on Kerr-type foundations. The novelty of the approach lies in the integration of three distinct damage models—the Voigt parallel model, the Reuss serial model, and the generalized self-consistent model—into a force-based framework. These models are employed to capture stiffness degradation in RAC beams under isotropic and homogeneous conditions, addressing the need for more realistic damage representation in sustainable concrete structures. The Kerr-type foundation model accounts for interaction between the beam and its underlying foundation, while the Euler–Bernoulli beam theory governs the beam's deformation behavior under small displacements. The governing equations are formulated using the virtual force principle. Through a series of numerical simulations, the study investigates how damage mechanisms and system parameters influence the bending response of the RAC beam–foundation system. The results demonstrate that both the type of damage model and foundation characteristics significantly affect the structural stiffness, leading to either softening or stiffening responses.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"23 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145141190","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}
Effective concrete breaking is a challenge for concrete recycling engineering. Macroscopic and microscopic tests were conducted to explore the thermal damage evolution of concrete under microwave irradiation in this paper. Uniaxial compressive strength test was employed to investigate the impact of microwave irradiation on concrete macroscopic mechanical. Concurrently, scanning electron microscopy test, X-Ray diffraction analysis, and computed tomography scan test were utilized to investigate microstructure evolution and chemical content variation. The results show that the response of basalt aggregate to microwaves was stronger than that of the mortar, resulting in thermal gradient stress between them, leading to interface debonding and concrete damage. Within the temperature range of 100°C–300°C, the water liberated by AFt (Ettringite) hydrolysis evaporated in conjunction with the free water within the concrete, leading to the increment of porosity and rapid growth of cracks. Within 300°C–500°C, CH and C-S-H decomposed, which causes internal crack propagation. A main fracture zone was formed in concrete after sufficient power input, creating a zone of concentrated damage. The fracture mainly occurred and propagated at aggregate–mortar interface. The study can provide a reference for the application of microwave-assisted concrete breaking.
混凝土有效破碎是混凝土回收利用工程面临的挑战。通过宏观和微观试验研究了微波辐照下混凝土的热损伤演化过程。采用单轴抗压强度试验研究了微波辐照对混凝土宏观力学性能的影响。同时，利用扫描电镜、x射线衍射分析和计算机断层扫描测试对其微观结构演变和化学成分变化进行了研究。结果表明：玄武岩骨料对微波的响应强于砂浆，两者之间产生热梯度应力，导致界面脱落，混凝土损伤；在100°C - 300°C的温度范围内，AFt（钙矾石）水解释放的水与混凝土内部的自由水一起蒸发，导致孔隙率增加，裂缝快速增长。在300℃- 500℃范围内，CH和C- s - h发生分解，导致内部裂纹扩展。足够的功率输入后，混凝土内部形成主断裂带，形成集中破坏区。断裂主要发生和扩展在骨料-砂浆界面。研究结果可为微波辅助混凝土破碎的应用提供参考。
{"title":"Microwave assisted concrete breakage: The viewpoint on analysing concrete thermal and mechanical behaviour","authors":"Wei Wei, Xing wang Chen, Zhenyang Zong, Rujia Qiao, Qian Geng","doi":"10.1177/10567895251380241","DOIUrl":"https://doi.org/10.1177/10567895251380241","url":null,"abstract":"Effective concrete breaking is a challenge for concrete recycling engineering. Macroscopic and microscopic tests were conducted to explore the thermal damage evolution of concrete under microwave irradiation in this paper. Uniaxial compressive strength test was employed to investigate the impact of microwave irradiation on concrete macroscopic mechanical. Concurrently, scanning electron microscopy test, X-Ray diffraction analysis, and computed tomography scan test were utilized to investigate microstructure evolution and chemical content variation. The results show that the response of basalt aggregate to microwaves was stronger than that of the mortar, resulting in thermal gradient stress between them, leading to interface debonding and concrete damage. Within the temperature range of 100°C–300°C, the water liberated by AFt (Ettringite) hydrolysis evaporated in conjunction with the free water within the concrete, leading to the increment of porosity and rapid growth of cracks. Within 300°C–500°C, CH and C-S-H decomposed, which causes internal crack propagation. A main fracture zone was formed in concrete after sufficient power input, creating a zone of concentrated damage. The fracture mainly occurred and propagated at aggregate–mortar interface. The study can provide a reference for the application of microwave-assisted concrete breaking.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"102 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145141569","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 : 2025-09-19DOI: 10.1177/10567895251380199
Hou Huiming, Yan Chong, Zhao Linshuang
In present work, a new microcrack-based anisotropic damage model is proposed for initially anisotropic rocks, such as sedimentary rock. A second-order damage tensor is adopted to represent the density and direction of the microcracks. The anisotropic mechanical damage evolution law is determined by the propagation of microcracks. Local tensile stress and linear elastic fracture mechanics are used to describe the propagation of microcrack. The orientation of bedding plane is also taken into account in damage evolution equation. The constitutive equations are developed by considering the coupling effects between the inherent and induced anisotropies. The model parameters can be determined by triaxial compression tests of rocks with different bedding orientations. The proposed model is applied to describe the mechanical behavior of a typical sedimentary rock. The experimental and simulated results are in good agreement. The model can capture the general anisotropic behavior and damage properties of the initially anisotropic rocks. Due to the crack-controlled model, snap-back behavior in the early softening regime is also captured.
{"title":"A microcrack-based continuum damage model for initially anisotropic sedimentary rocks","authors":"Hou Huiming, Yan Chong, Zhao Linshuang","doi":"10.1177/10567895251380199","DOIUrl":"https://doi.org/10.1177/10567895251380199","url":null,"abstract":"In present work, a new microcrack-based anisotropic damage model is proposed for initially anisotropic rocks, such as sedimentary rock. A second-order damage tensor is adopted to represent the density and direction of the microcracks. The anisotropic mechanical damage evolution law is determined by the propagation of microcracks. Local tensile stress and linear elastic fracture mechanics are used to describe the propagation of microcrack. The orientation of bedding plane is also taken into account in damage evolution equation. The constitutive equations are developed by considering the coupling effects between the inherent and induced anisotropies. The model parameters can be determined by triaxial compression tests of rocks with different bedding orientations. The proposed model is applied to describe the mechanical behavior of a typical sedimentary rock. The experimental and simulated results are in good agreement. The model can capture the general anisotropic behavior and damage properties of the initially anisotropic rocks. Due to the crack-controlled model, snap-back behavior in the early softening regime is also captured.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"11 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145089627","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 : 2025-09-08DOI: 10.1177/10567895251375352
Yuhan Tang, Yuedong Wang, Yonghua Li, Tao Guo, Qiyu An, Qi Dong
The fatigue failure of the rail vehicle bogie frame is primarily attributed to nonlinear fatigue damage under complex loading conditions. As one of the key technologies for promoting digitization in the field of rail transport, the related studies focusing on nonlinear fatigue damage assessment of the bogie frame based on a digital twin are being developed. In response to this case, a five-dimensional digital twin model of the bogie frame with a new approach for accumulation fatigue damage is established. To enhance the accuracy of the fatigue damage assessment in the digital twin model, an improved Manson–Halford nonlinear cumulative analytical model is presented based on the analogy between the decomposition of organic matter in ecology and the degradation of mechanical properties of materials. Additionally, to boost the efficiency of mapping between the physical entity and the virtual entity based on physical programming and particle swarm optimization. The proposed digital twin model uniquely merges data-driven and mechanics-driven methodologies, offering a robust solution for the structural design and durability optimization of the bogie frame.
{"title":"A five-dimensional digital twin model of bogie frame with a new approach for accumulation fatigue damage","authors":"Yuhan Tang, Yuedong Wang, Yonghua Li, Tao Guo, Qiyu An, Qi Dong","doi":"10.1177/10567895251375352","DOIUrl":"https://doi.org/10.1177/10567895251375352","url":null,"abstract":"The fatigue failure of the rail vehicle bogie frame is primarily attributed to nonlinear fatigue damage under complex loading conditions. As one of the key technologies for promoting digitization in the field of rail transport, the related studies focusing on nonlinear fatigue damage assessment of the bogie frame based on a digital twin are being developed. In response to this case, a five-dimensional digital twin model of the bogie frame with a new approach for accumulation fatigue damage is established. To enhance the accuracy of the fatigue damage assessment in the digital twin model, an improved Manson–Halford nonlinear cumulative analytical model is presented based on the analogy between the decomposition of organic matter in ecology and the degradation of mechanical properties of materials. Additionally, to boost the efficiency of mapping between the physical entity and the virtual entity based on physical programming and particle swarm optimization. The proposed digital twin model uniquely merges data-driven and mechanics-driven methodologies, offering a robust solution for the structural design and durability optimization of the bogie frame.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"69 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145017273","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 : 2025-08-19DOI: 10.1177/10567895251365631
Yihao Ren, Bao Qin, Zheng Zhong
Once sulfate ions enter a concrete structure, they can react with multiple aluminate phases within the concrete to form ettringite, which eventually leads to swelling and cracking of the structure. To reveal the mechanism of external sulfate attack (ESA), a fully coupled nonlinear constitutive model is developed for transient diffusion-reaction-deformation response of concrete exposed to sulfate environment, by introducing the concentration of sulfate diffusion and the extents of multiple sulfate reactions as independent variables to characterize their respective contributions to free energy and volume expansion. In addition, a structural damage function is incorporated to measure the effect of ESA on elastic constants and diffusion coefficient of concrete. Specially, multiple reaction kinetics equations are established to satisfy the dissipation inequality, which depend not only on the concentrations of the species involved, but also on the stress. The model is then validated by comparing with the experimental results of one-dimensional sulfate attack, and numerical examples are used to illustrate the competing mechanisms between multiple reaction pathways and the interaction between chemical reactions and mechanical loading.
{"title":"Modeling of concrete under external sulfate attack considering the effect of multiple chemical reactions","authors":"Yihao Ren, Bao Qin, Zheng Zhong","doi":"10.1177/10567895251365631","DOIUrl":"https://doi.org/10.1177/10567895251365631","url":null,"abstract":"Once sulfate ions enter a concrete structure, they can react with multiple aluminate phases within the concrete to form ettringite, which eventually leads to swelling and cracking of the structure. To reveal the mechanism of external sulfate attack (ESA), a fully coupled nonlinear constitutive model is developed for transient diffusion-reaction-deformation response of concrete exposed to sulfate environment, by introducing the concentration of sulfate diffusion and the extents of multiple sulfate reactions as independent variables to characterize their respective contributions to free energy and volume expansion. In addition, a structural damage function is incorporated to measure the effect of ESA on elastic constants and diffusion coefficient of concrete. Specially, multiple reaction kinetics equations are established to satisfy the dissipation inequality, which depend not only on the concentrations of the species involved, but also on the stress. The model is then validated by comparing with the experimental results of one-dimensional sulfate attack, and numerical examples are used to illustrate the competing mechanisms between multiple reaction pathways and the interaction between chemical reactions and mechanical loading.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"25 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144899920","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 : 2025-08-18DOI: 10.1177/10567895251358294
Louise Olsen-Kettle, Sanjib Mondal, Hugo Walsh, Bradley Talbot, Osamah Obayes, Jessey Lee
Concrete cone (or breakout) failure mode is the dominant failure for cast-in headed anchors under tension in mature brittle concrete, however, other failure modes such as plug failure has been found experimentally to dominate in early age concrete. Design codes generally assume concrete cone failure and do not cover plug failure. A new model for concrete at early ages is proposed based on continuum damage mechanics which can model both failure modes for cast-in headed anchors in early age concrete. The new damage model combines a modified power law for the onset of damage, an exponential softening law for the post-failure softening stage, and an additional modified power law to reproduce the final stages of fracture. The combined damage law is calibrated with three experimental tests for concrete at two different ages (43 hours and 14 days): uniaxial compression, Brazilian splitting tensile and wedge splitting tests. The new models are applied to investigate anchor pull-out failure to demonstrate that both cone and plug failure modes are produced depending on concrete age. Simulations using the combined damage evolution laws gave the lowest average percent error over the mechanical properties measured in the four tests, when compared with existing damage evolution laws.
{"title":"Analysis of new damage evolution models for early age concrete","authors":"Louise Olsen-Kettle, Sanjib Mondal, Hugo Walsh, Bradley Talbot, Osamah Obayes, Jessey Lee","doi":"10.1177/10567895251358294","DOIUrl":"https://doi.org/10.1177/10567895251358294","url":null,"abstract":"Concrete cone (or breakout) failure mode is the dominant failure for cast-in headed anchors under tension in mature brittle concrete, however, other failure modes such as plug failure has been found experimentally to dominate in early age concrete. Design codes generally assume concrete cone failure and do not cover plug failure. A new model for concrete at early ages is proposed based on continuum damage mechanics which can model both failure modes for cast-in headed anchors in early age concrete. The new damage model combines a modified power law for the onset of damage, an exponential softening law for the post-failure softening stage, and an additional modified power law to reproduce the final stages of fracture. The combined damage law is calibrated with three experimental tests for concrete at two different ages (43 hours and 14 days): uniaxial compression, Brazilian splitting tensile and wedge splitting tests. The new models are applied to investigate anchor pull-out failure to demonstrate that both cone and plug failure modes are produced depending on concrete age. Simulations using the combined damage evolution laws gave the lowest average percent error over the mechanical properties measured in the four tests, when compared with existing damage evolution laws.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"13 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144901875","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 : 2025-07-30DOI: 10.1177/10567895251357959
Jiaming Yuan, Dongdong Ma, Chao Li
Two modification approaches, namely vacuum heating and cement precoating, were applied to optimize the bulk hardening and surface treatment of rubber particles. The physicochemical characteristics of vacuum-heated modified rubber underwent comprehensive evaluation through rubber hardness testing, water contact angle assessments, and Fourier transform infrared spectroscopy. Unconfined compressive strength (UCS) tests combined with digital image correlation techniques were utilized to evaluate the strength improvement and damage evolution mechanism in modified rubber cement stabilized soil (RCS) specimens, while scanning electron microscopy was used to further characterize the microstructural failure mechanisms of modified RCS. The effectiveness of both methods was validated through significance analysis and nonlinear surface fitting of RCS strength data under varying modification parameters. Experimental results revealed that vacuum heating elevated rubber hardness by 34.6% and decreased water contact angle by 16.1° relative to untreated controls, significantly enhancing the UCS of RCS. The vacuum heating method could improve the cohesive properties and structural continuity of specimens, whereas cement precoated samples achieved strength gains without sacrificing material toughness. Both of the above two methods successfully facilitated rubber particle integration within the cement-stabilized soil matrix.
{"title":"Study on mechanical properties and damage evolution of modified rubberized cement stabilized soil","authors":"Jiaming Yuan, Dongdong Ma, Chao Li","doi":"10.1177/10567895251357959","DOIUrl":"https://doi.org/10.1177/10567895251357959","url":null,"abstract":"Two modification approaches, namely vacuum heating and cement precoating, were applied to optimize the bulk hardening and surface treatment of rubber particles. The physicochemical characteristics of vacuum-heated modified rubber underwent comprehensive evaluation through rubber hardness testing, water contact angle assessments, and Fourier transform infrared spectroscopy. Unconfined compressive strength (UCS) tests combined with digital image correlation techniques were utilized to evaluate the strength improvement and damage evolution mechanism in modified rubber cement stabilized soil (RCS) specimens, while scanning electron microscopy was used to further characterize the microstructural failure mechanisms of modified RCS. The effectiveness of both methods was validated through significance analysis and nonlinear surface fitting of RCS strength data under varying modification parameters. Experimental results revealed that vacuum heating elevated rubber hardness by 34.6% and decreased water contact angle by 16.1° relative to untreated controls, significantly enhancing the UCS of RCS. The vacuum heating method could improve the cohesive properties and structural continuity of specimens, whereas cement precoated samples achieved strength gains without sacrificing material toughness. Both of the above two methods successfully facilitated rubber particle integration within the cement-stabilized soil matrix.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"137 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144747363","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 : 2025-07-30DOI: 10.1177/10567895251358292
Juntao Wang, Li'an Shen, Xue Luo, Yuqing Zhang
Research on bituminous material fatigue has traditionally focused on tensile or shear damage of bitumen and asphalt mixtures, neglecting the critical bitumen–aggregate interfaces where microcracks initiate. Addressing this gap, the pull-off fatigue crack (POF-C) model was built to predict crack propagation at these interfaces under pull-off cyclic loading. The model, based on continuum damage mechanics principles, integrates force equilibrium and dissipated strain energy equilibrium. Pull-off fatigue tests were conducted on interfaces using limestone, tuff, and basalt aggregates, with #70 matrix bitumen and styrene–butadiene–styrene copolymer-modified bitumen, at temperatures of 15°C and 20°C, and with bitumen film thicknesses ranging from 0.2 mm to 0.8 mm. Dynamic modulus and phase angle data informed the model inputs. Predicted crack sizes closely matched measured results on fractured surfaces, demonstrating less than 2% prediction error. Scanning electron microscope tests confirmed the model's validity, showing numerous circular mesh depressions on fracture surfaces. The POF-C model accurately forecasts POF-C lengths across varied conditions, revealing three distinct stages of crack propagation: a rapid growth (∼0.025 mm/cycle), a stable expansion stage (<0.025 mm/cycle), and a slow fatigue stage (∼0 mm/cycle). The fatigue mechanism involves the development of microdamage into microcracks, their nucleation and aggregation, and macrocrack throughout the entire bitumen–aggregate interface.
{"title":"Mechanistic modeling and pull-off experimental validations of fatigue damage at bitumen–aggregate interfaces","authors":"Juntao Wang, Li'an Shen, Xue Luo, Yuqing Zhang","doi":"10.1177/10567895251358292","DOIUrl":"https://doi.org/10.1177/10567895251358292","url":null,"abstract":"Research on bituminous material fatigue has traditionally focused on tensile or shear damage of bitumen and asphalt mixtures, neglecting the critical bitumen–aggregate interfaces where microcracks initiate. Addressing this gap, the pull-off fatigue crack (POF-C) model was built to predict crack propagation at these interfaces under pull-off cyclic loading. The model, based on continuum damage mechanics principles, integrates force equilibrium and dissipated strain energy equilibrium. Pull-off fatigue tests were conducted on interfaces using limestone, tuff, and basalt aggregates, with #70 matrix bitumen and styrene–butadiene–styrene copolymer-modified bitumen, at temperatures of 15°C and 20°C, and with bitumen film thicknesses ranging from 0.2 mm to 0.8 mm. Dynamic modulus and phase angle data informed the model inputs. Predicted crack sizes closely matched measured results on fractured surfaces, demonstrating less than 2% prediction error. Scanning electron microscope tests confirmed the model's validity, showing numerous circular mesh depressions on fracture surfaces. The POF-C model accurately forecasts POF-C lengths across varied conditions, revealing three distinct stages of crack propagation: a rapid growth (∼0.025 mm/cycle), a stable expansion stage (<0.025 mm/cycle), and a slow fatigue stage (∼0 mm/cycle). The fatigue mechanism involves the development of microdamage into microcracks, their nucleation and aggregation, and macrocrack throughout the entire bitumen–aggregate interface.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"15 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144747362","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 : 2025-07-22DOI: 10.1177/10567895251360387
Raniere S Neves, Guilherme V Ferreira, Duarte JL Cachulo, Jose MA César de Sá, Abilio MP De Jesus, Lucival Malcher
This study proposes the extension of an incremental damage approach to fatigue life estimate presented by Neves and co-authors, assuming high-cycle fatigue regime, through the adoption of a two-scale damage approach previously proposed by Lemaitre. Under high-cycle fatigue conditions, plastic strain only occurs at the microstructural scale of a material. In this sense, it is not possible to use traditional damage models, whose damage evolution laws are governed by the plasticity and observed in the classical scale adopted by the continuum damage mechanics. An alternative approach was proposed by Lemaitre to separate the material behavior into two scales: one microscopic and the other macroscopic. In addition, a localization law is used to correlate the behavior of the material at both scales. Furthermore, the predictive capacity of the approach proposed in this paper is assessed by comparing the life values predicted by it and those observed experimentally from fatigue tests performed by force control on hourglass-shaped specimens made of grade R4 steel, a material used by the offshore industry in the manufacturing of mooring systems. In conclusion, the approach's predictive capability for fatigue life estimation showed 75% of results within a dispersion band of 2.
{"title":"A two-scale damage model for high-cycle fatigue life predictions following an incremental approach","authors":"Raniere S Neves, Guilherme V Ferreira, Duarte JL Cachulo, Jose MA César de Sá, Abilio MP De Jesus, Lucival Malcher","doi":"10.1177/10567895251360387","DOIUrl":"https://doi.org/10.1177/10567895251360387","url":null,"abstract":"This study proposes the extension of an incremental damage approach to fatigue life estimate presented by Neves and co-authors, assuming high-cycle fatigue regime, through the adoption of a two-scale damage approach previously proposed by Lemaitre. Under high-cycle fatigue conditions, plastic strain only occurs at the microstructural scale of a material. In this sense, it is not possible to use traditional damage models, whose damage evolution laws are governed by the plasticity and observed in the classical scale adopted by the continuum damage mechanics. An alternative approach was proposed by Lemaitre to separate the material behavior into two scales: one microscopic and the other macroscopic. In addition, a localization law is used to correlate the behavior of the material at both scales. Furthermore, the predictive capacity of the approach proposed in this paper is assessed by comparing the life values predicted by it and those observed experimentally from fatigue tests performed by force control on hourglass-shaped specimens made of grade R4 steel, a material used by the offshore industry in the manufacturing of mooring systems. In conclusion, the approach's predictive capability for fatigue life estimation showed 75% of results within a dispersion band of 2.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"13 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144677419","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}
In practical engineering applications, rolling bearings and other critical components are typically subjected to complex, variable loading conditions. The coupled effects of load magnitude, frequency, and phase significantly accelerate the initiation and propagation of fatigue cracks. Although existing fatigue damage accumulation models partially account for load sequence and interaction, many of these models are overly complex and involve numerous parameters, making it challenging to strike a balance between accuracy and computational efficiency. To address this issue, this paper proposes a fatigue damage accumulation model based on nonlinear damage evolution theory, which simultaneously considers the effects of load interaction and material parameters under variable loading conditions. By incorporating the interaction factor and critical material parameters, the model more accurately characterizes the variations in load spectra and the differences in fatigue performance among different materials. Subsequently, the model was validated against cyclic loading test data for 16Mn steel, hot-rolled 16Mn steel, 30NiCrMoV12 steel, Ti–6Al–4V titanium alloy, GS-61 steel, Al2024–T42 aluminum alloy, C45 steel, Q235B steel, and Al6082–T6 aluminum alloy. Comparative analyses with the Miner rule, Manson–Halford model, Aeran's model, and its improved model demonstrated that the proposed model exhibits significant improvements in both predictive accuracy and generalization capability. Furthermore, to verify the model's applicability in real-world engineering environments, two rolling bearings subjected to variable operating conditions were selected for case studies. The results indicate that the model exhibits strong validity and applicability in fatigue life prediction, offering novel insights and methods for the safety assessment and life prediction of critical components subjected to complex loading spectra.
{"title":"A nonlinear fatigue damage accumulation model for rolling bearing life prediction considering coupled load-variation effects","authors":"Xinyu Ge, Chao Zhang, Wenyang Zhang, Ximing Zhang, Kexi Xu","doi":"10.1177/10567895251358415","DOIUrl":"https://doi.org/10.1177/10567895251358415","url":null,"abstract":"In practical engineering applications, rolling bearings and other critical components are typically subjected to complex, variable loading conditions. The coupled effects of load magnitude, frequency, and phase significantly accelerate the initiation and propagation of fatigue cracks. Although existing fatigue damage accumulation models partially account for load sequence and interaction, many of these models are overly complex and involve numerous parameters, making it challenging to strike a balance between accuracy and computational efficiency. To address this issue, this paper proposes a fatigue damage accumulation model based on nonlinear damage evolution theory, which simultaneously considers the effects of load interaction and material parameters under variable loading conditions. By incorporating the interaction factor and critical material parameters, the model more accurately characterizes the variations in load spectra and the differences in fatigue performance among different materials. Subsequently, the model was validated against cyclic loading test data for 16Mn steel, hot-rolled 16Mn steel, 30NiCrMoV12 steel, Ti–6Al–4V titanium alloy, GS-61 steel, Al2024–T42 aluminum alloy, C45 steel, Q235B steel, and Al6082–T6 aluminum alloy. Comparative analyses with the Miner rule, Manson–Halford model, Aeran's model, and its improved model demonstrated that the proposed model exhibits significant improvements in both predictive accuracy and generalization capability. Furthermore, to verify the model's applicability in real-world engineering environments, two rolling bearings subjected to variable operating conditions were selected for case studies. The results indicate that the model exhibits strong validity and applicability in fatigue life prediction, offering novel insights and methods for the safety assessment and life prediction of critical components subjected to complex loading spectra.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"704 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144685156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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