International Journal of Fatigue最新文献

英文中文

The influence of printing strategies on the fatigue crack growth behaviour of an additively manufactured Ti6Al4V Grade 23 titanium alloy

IF 5.7 2区材料科学 Q1 ENGINEERING, MECHANICAL

International Journal of Fatigue

Pub Date : 2025-03-17 DOI: 10.1016/j.ijfatigue.2025.108942

Rui F. Martins , Ricardo Branco , José Camacho , Wojciech Macek , Zbigniew Marciniak , António Silva , Cândida Malça

The selective laser melting (SLM) process, a type of laser powder-bed fusion (LPBF) in additive manufacturing (AM), uses a high-power density laser to melt metallic powders. This study involved 3D printing Compact Tension (CT) specimens from titanium alloy Ti6Al4V, known for its rigidity, corrosion resistance, and biocompatibility, making it suitable for aerospace and medical applications.

To predict fatigue life, it is essential to assess fatigue crack growth rates (FCGR) in the presence of cracks. This investigation tested three printing strategies − transversal, longitudinal, and cross − under constant amplitude loading (R = 0.2) and compared the results with reference titanium alloys. Scanning electron microscopy (SEM) was used to analyze the fracture surfaces.

The results indicated that the as-built AM transversal CT specimens (R = 0.2) had superior FCGR compared to the longitudinal and cross specimens, closely matching those of SLM-produced Ti6Al4V heat-treated at 670 °C (R = 0.05). The transverse deposition mode yielded the best performance, with fracture surfaces exhibiting mainly transgranular propagation. In addition, fracture surface topography measurements showed a strong correlation with fatigue life, particularly the relationship between the mean depth of furrows and the number of cycles to failure.

{"title":"The influence of printing strategies on the fatigue crack growth behaviour of an additively manufactured Ti6Al4V Grade 23 titanium alloy","authors":"Rui F. Martins , Ricardo Branco , José Camacho , Wojciech Macek , Zbigniew Marciniak , António Silva , Cândida Malça","doi":"10.1016/j.ijfatigue.2025.108942","DOIUrl":"10.1016/j.ijfatigue.2025.108942","url":null,"abstract":"<div><div>The selective laser melting (SLM) process, a type of laser powder-bed fusion (LPBF) in additive manufacturing (AM), uses a high-power density laser to melt metallic powders. This study involved 3D printing Compact Tension (CT) specimens from titanium alloy Ti6Al4V, known for its rigidity, corrosion resistance, and biocompatibility, making it suitable for aerospace and medical applications.</div><div>To predict fatigue life, it is essential to assess fatigue crack growth rates (FCGR) in the presence of cracks. This investigation tested three printing strategies − transversal, longitudinal, and cross − under constant amplitude loading (R = 0.2) and compared the results with reference titanium alloys. Scanning electron microscopy (SEM) was used to analyze the fracture surfaces.</div><div>The results indicated that the as-built AM transversal CT specimens (R = 0.2) had superior FCGR compared to the longitudinal and cross specimens, closely matching those of SLM-produced Ti6Al4V heat-treated at 670 °C (R = 0.05). The transverse deposition mode yielded the best performance, with fracture surfaces exhibiting mainly transgranular propagation. In addition, fracture surface topography measurements showed a strong correlation with fatigue life, particularly the relationship between the mean depth of furrows and the number of cycles to failure.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"197 ","pages":"Article 108942"},"PeriodicalIF":5.7,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143644060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Notch structural stress theory: Part Ⅲ surface roughness effect on fatigue lives

IF 5.7 2区材料科学 Q1 ENGINEERING, MECHANICAL

International Journal of Fatigue

Pub Date : 2025-03-17 DOI: 10.1016/j.ijfatigue.2025.108938

Yifei Yu , Wenchun Jang , Bingying Wang , Fuxiao Hu , Hongge Li , Zhiqiang Ding

The dispersion of fatigue data is largely attributed to the effects of surface roughness, which are often overlooked in current structural fatigue assessment methodologies. This study examines the influence of surface roughness on the fatigue life of aluminum alloy notched specimens using our previously established Theory of Notch Structural Stress (TNSS). Results demonstrate a strong correlation between the IR describing the influence from structure factors and p_i related to fatigue life prediction, when the maximum valley depth of the surface profile is employed as an appropriate parameter. Consequently, TNSS enables accurate fatigue life predictions across varying notch geometries and surface roughness conditions.

While surface roughness is commonly regarded as having minimal impact on fatigue performance in the presence of sharp notches, the definition of notch sharpness remains ambiguous. In respect of this point, TNSS quantifies roughness sensitivity across different notch forms within a unified physical framework, providing a generalized understanding of roughness effects on fatigue lives without disregarding the crack initiation stage.

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引用次数: 0

A novel physical cycle-jump method for fatigue crack simulation of polycrystalline nickel-based superalloy

IF 5.7 2区材料科学 Q1 ENGINEERING, MECHANICAL

International Journal of Fatigue

Pub Date : 2025-03-15 DOI: 10.1016/j.ijfatigue.2025.108932

Shaojing Dong, Minhui Zhou, Xiuli Shen

In recent years, the crystal plastic damage model has been widely used in transgranular fracture. This paper designs mixed dissipative energy damage based on stress fatigue. In general, long-period simulations must use cycle-jump method, and the transient nature of crack propagation significantly reduces the efficiency of mathematical extrapolation strategies. According to the physical correlation between the variables in the crystal plastic model, an equivalent load block is established to replace the real-time load spectrum, and a novel physical cycle-jump strategy is realized. Under the stable and disturbed load spectrum, the accuracy and efficiency of the physical strategy are better than that of the mathematical strategies. The fatigue crack propagation in the three-dimensional polycrystalline model is in good agreement with the experimental results. Finally, by focusing on crack nucleation elements, the fatigue damage parameters are determined using genetic optimization. The error between the simulated fatigue life and the test is within 7%.

引用次数: 0

A data-assisted physics-informed neural network for predicting fatigue life of electronic components under complex shock loads

IF 5.7 2区材料科学 Q1 ENGINEERING, MECHANICAL

International Journal of Fatigue

Pub Date : 2025-03-13 DOI: 10.1016/j.ijfatigue.2025.108933

Shuai Ma , Yongbin Dang , Yi Sun , Zhiqiang Yang

Reusable spacecraft electronic components experience multiple, complex shock damage during their operational life, which is a primary contributor to mission failure. This study proposes a data-assisted physics-informed neural network (DA-PINN) model to assess fatigue damage in electronic components under complex shock loads. Unlike traditional PINN that solves partial differential equations, DA-PINN combines experimental with physics equations to enhance prediction accuracy. An autoregressive (AR) model was used to improve the shock fatigue life model, which was then integrated as a physical constraint into the loss function of DA-PINN. Subsequently, using ball grid array (BGA) solder joints as the research subject, complex shock fatigue experiments were conducted to train and validate the DA-PINN model. The results demonstrate the outstanding performance of the DA-PINN model, with all predicted shock fatigue life values falling within a scatter band of 1.5 times, surpassing the traditional shock fatigue life model and artificial neural networks. Notably, the physics-informed constraints embedded in DA-PINN enable it to maintain strong prediction accuracy and stability even when trained on small datasets. The proposed model can provide a reference for predicting the shock fatigue life of electronic components in reusable spacecraft.

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引用次数: 0

Grain size refinement of hard nitride coating to mitigate fatigue performance degradation in ductile metal substrate 细化硬氮化物涂层的晶粒尺寸，缓解韧性金属基材的疲劳性能退化

IF 5.7 2区材料科学 Q1 ENGINEERING, MECHANICAL

International Journal of Fatigue

Pub Date : 2025-03-12 DOI: 10.1016/j.ijfatigue.2025.108935

Zhaolu Zhang

This paper proposes an effective way to relieve the side effect of hard nitride coating on tough metal substrate by reducing coating grain size and revealing its inner mechanism. Utilizing the thickness-dependent effect of physical vapor deposited hard coating grain size, TiN coatings with grain sizes of 9.6 nm, 16.5 nm, and 23.4 nm were prepared on the surface of 2A70 aluminum alloy fatigue specimen by filtered cathodic vacuum arc deposition. Rotating bending fatigue tests revealed that the median fatigue limits of 2A70, 2A70 with TiN coating at grain sizes of 9.6 nm, 16.5 nm, and 23.4 nm are 165.83 MPa, 127.5 MPa, 113.75 MPa, and 112.5 MPa, respectively. Under high-cycle fatigue loading, the TiN coating with a grain size of 9.6 nm exhibits the least damage to the substrate’s fatigue performance. And the fatigue resistance of TiN determines its damage extent to metal substrate’s fatigue behavior. Molecular dynamics analysis shows that the maximum stress experienced by TiN coatings increases with grain size after undergoing various fatigue loading cycles. Under alternating loads, smaller grains with more grain boundaries lead to predominant intergranular sliding in the TiN coating.

{"title":"Grain size refinement of hard nitride coating to mitigate fatigue performance degradation in ductile metal substrate","authors":"Zhaolu Zhang","doi":"10.1016/j.ijfatigue.2025.108935","DOIUrl":"10.1016/j.ijfatigue.2025.108935","url":null,"abstract":"<div><div>This paper proposes an effective way to relieve the side effect of hard nitride coating on tough metal substrate by reducing coating grain size and revealing its inner mechanism. Utilizing the thickness-dependent effect of physical vapor deposited hard coating grain size, TiN coatings with grain sizes of 9.6 nm, 16.5 nm, and 23.4 nm were prepared on the surface of 2A70 aluminum alloy fatigue specimen by filtered cathodic vacuum arc deposition. Rotating bending fatigue tests revealed that the median fatigue limits of 2A70, 2A70 with TiN coating at grain sizes of 9.6 nm, 16.5 nm, and 23.4 nm are 165.83 MPa, 127.5 MPa, 113.75 MPa, and 112.5 MPa, respectively. Under high-cycle fatigue loading, the TiN coating with a grain size of 9.6 nm exhibits the least damage to the substrate’s fatigue performance. And the fatigue resistance of TiN determines its damage extent to metal substrate’s fatigue behavior. Molecular dynamics analysis shows that the maximum stress experienced by TiN coatings increases with grain size after undergoing various fatigue loading cycles. Under alternating loads, smaller grains with more grain boundaries lead to predominant intergranular sliding in the TiN coating.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"197 ","pages":"Article 108935"},"PeriodicalIF":5.7,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143620303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The influence of stress levels on crack initiation and propagation behaviors of an Al-Li alloy under high cycle fatigue 高循环疲劳下应力水平对铝锂合金裂纹萌发和扩展行为的影响

IF 5.7 2区材料科学 Q1 ENGINEERING, MECHANICAL

International Journal of Fatigue

Pub Date : 2025-03-12 DOI: 10.1016/j.ijfatigue.2025.108934

Xusheng Yang , Wenya Xiao , Weijiu Huang , Xianghui Zhu , Mofang Liu , Yuanzhi Qian

This study investigates the crack initiation and propagation behavior in AA2099 Al-Li alloy under high cycle fatigue (HCF) conditions using SEM, TEM, and EDS. The research focuses on the formation mechanisms of slip bands (SBs) and fatigue striations of small cracks. Results show that crack initiation primarily originates from surface or near-surface regions, particularly near inclusions and Fe-rich particles. Crack initiation tends to be single-source at low stress levels and multi-source at higher stress levels. SBs formation is closely associated with stress levels; as stress increases, SBs formation becomes more pronounced, and band spacing decreases. At low stress levels, significant crack deflection occurs due to single slip mechanism activation, while at high stress levels, multiple slip system activation results in a flatter fatigue crack propagation (FCP) path. Early-stage FCP of Al-Li alloys under HCF exhibits small crack characteristics. The formation of fatigue striations in small cracks is influenced by the degree of work hardening at the crack tip, and the spacing of fatigue striations decreases with increasing stress levels. However, as the crack length increases, the spacing of fatigue striations gradually increases, which is attributed to the development of the crack closure effect during the later stages of FCP.

{"title":"The influence of stress levels on crack initiation and propagation behaviors of an Al-Li alloy under high cycle fatigue","authors":"Xusheng Yang , Wenya Xiao , Weijiu Huang , Xianghui Zhu , Mofang Liu , Yuanzhi Qian","doi":"10.1016/j.ijfatigue.2025.108934","DOIUrl":"10.1016/j.ijfatigue.2025.108934","url":null,"abstract":"<div><div>This study investigates the crack initiation and propagation behavior in AA2099 Al-Li alloy under high cycle fatigue (HCF) conditions using SEM, TEM, and EDS. The research focuses on the formation mechanisms of slip bands (SBs) and fatigue striations of small cracks. Results show that crack initiation primarily originates from surface or near-surface regions, particularly near inclusions and Fe-rich particles. Crack initiation tends to be single-source at low stress levels and multi-source at higher stress levels. SBs formation is closely associated with stress levels; as stress increases, SBs formation becomes more pronounced, and band spacing decreases. At low stress levels, significant crack deflection occurs due to single slip mechanism activation, while at high stress levels, multiple slip system activation results in a flatter fatigue crack propagation (FCP) path. Early-stage FCP of Al-Li alloys under HCF exhibits small crack characteristics. The formation of fatigue striations in small cracks is influenced by the degree of work hardening at the crack tip, and the spacing of fatigue striations decreases with increasing stress levels. However, as the crack length increases, the spacing of fatigue striations gradually increases, which is attributed to the development of the crack closure effect during the later stages of FCP.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"197 ","pages":"Article 108934"},"PeriodicalIF":5.7,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143620305","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The high cycle fatigue behavior of niobium micro-alloyed high-Mn austenitic steel with unusual precipitation at 77 K

IF 5.7 2区材料科学 Q1 ENGINEERING, MECHANICAL

International Journal of Fatigue

Pub Date : 2025-03-12 DOI: 10.1016/j.ijfatigue.2025.108914

Pengjie Wang , Hanlin Song , Jie Li , Jinyi Ren , Zhenyu Liu

Five high-Mn austenitic steels with different niobium contents are adopted to investigate their fatigue performance at 77 K by a homemade cryogenic device. The results show that although the tensile strength increases with the increase in Nb content, the fatigue performance shows an increasing followed by decreasing trend. Because the density of deformation twins is almost unchanged, so the increase in fatigue performance can be attributed to solution strengthening, grain refinement strengthening and precipitation strengthening. While the decrease can be attributed to the reduced initial microstructure uniformity and precipitates along twin boundaries which reduces the fatigue cracking resistance.

引用次数: 0

Effect of oxidation on the competition between internal and external fatigue crack initiation of Ni-based single crystal superalloy 氧化对镍基单晶超合金内部和外部疲劳裂纹起始竞争的影响

IF 5.7 2区材料科学 Q1 ENGINEERING, MECHANICAL

International Journal of Fatigue

Pub Date : 2025-03-11 DOI: 10.1016/j.ijfatigue.2025.108930

Yang Meng , Chungen Zhou , Zihua Zhao , Yuliang Shen , Haonan Pei , Ming Zhao

Whether surface oxidation damage can shift the crack initiation location of Ni-based single crystal superalloys from internal defects to the surface in the VHCF regime remains an open question. This study examined two experimental conditions with pre-oxidation or high oxidation rates: fatigue tests at 1000 °C after pre-oxidation at 1100 °C for 100 h, and at 1050 °C on unoxidized specimens. The results indicate that both severe pre-oxidation and elevated oxidation rates lead to surface crack initiation. In pre-oxidized specimens, surface recrystallization occurs early, triggering surface cracking and reducing fatigue strength at 10⁷ cycles, though its effect at 10⁹ cycles is minimal. At 1050 °C, the fatigue strength decreases markedly compared with 1000 °C, and cracks consistently initiate at the surface and propagation in Mode I. Thermal growth stress of oxides near the crack tip alters the local stress state, promoting γ’ rafting. Deformation accumulated at γ/γ’ interfaces, coupled with γ’ rafting and low-angle grain boundaries, accelerates aluminum diffusion, forming Al₂O₃ as the dominant oxide. Additionally, oxidation lowers the effective stress intensity factor, affecting crack propagation. Overall, these findings confirm that enhancing oxidation resistance is still critical for improving VHCF performance in Ni-based single crystal superalloys.

{"title":"Effect of oxidation on the competition between internal and external fatigue crack initiation of Ni-based single crystal superalloy","authors":"Yang Meng , Chungen Zhou , Zihua Zhao , Yuliang Shen , Haonan Pei , Ming Zhao","doi":"10.1016/j.ijfatigue.2025.108930","DOIUrl":"10.1016/j.ijfatigue.2025.108930","url":null,"abstract":"<div><div>Whether surface oxidation damage can shift the crack initiation location of Ni-based single crystal superalloys from internal defects to the surface in the VHCF regime remains an open question. This study examined two experimental conditions with pre-oxidation or high oxidation rates: fatigue tests at 1000 °C after pre-oxidation at 1100 °C for 100 h, and at 1050 °C on unoxidized specimens. The results indicate that both severe pre-oxidation and elevated oxidation rates lead to surface crack initiation. In pre-oxidized specimens, surface recrystallization occurs early, triggering surface cracking and reducing fatigue strength at 10<sup>7</sup> cycles, though its effect at 10<sup>9</sup> cycles is minimal. At 1050 °C, the fatigue strength decreases markedly compared with 1000 °C, and cracks consistently initiate at the surface and propagation in Mode I. Thermal growth stress of oxides near the crack tip alters the local stress state, promoting γ’ rafting. Deformation accumulated at γ/γ’ interfaces, coupled with γ’ rafting and low-angle grain boundaries, accelerates aluminum diffusion, forming Al<sub>2</sub>O<sub>3</sub> as the dominant oxide. Additionally, oxidation lowers the effective stress intensity factor, affecting crack propagation. Overall, these findings confirm that enhancing oxidation resistance is still critical for improving VHCF performance in Ni-based single crystal superalloys.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"197 ","pages":"Article 108930"},"PeriodicalIF":5.7,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143620304","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermo-mechanical fatigue damage mechanism and life prediction of compacted graphite iron with high strength

IF 5.7 2区材料科学 Q1 ENGINEERING, MECHANICAL

International Journal of Fatigue

Pub Date : 2025-03-11 DOI: 10.1016/j.ijfatigue.2025.108931

C.L. Zou , B.Z. Tan , Y.J. Zhang , J.C. Pang , F. Shi , A.L. Jiang , S.X. Li , Q.H. Wu , Z.F. Zhang

The thermo-mechanical fatigue (TMF) damage mechanism of typical compacted graphite iron with high strength (RuT450) was investigated in different temperature ranges. The results indicate that the TMF life decreases as the peak temperatures rise from 400 °C to 500 °C. As the cyclic number increases, the maximum tensile stress shows slight cyclic hardening in the temperature range of 100 to 400 °C. Additionally, in the temperature range of 100 to 500 °C, the maximum compressive stress exhibits slight cyclic softening. The fatigue damage and crack propagation processes demonstrate that the tearing of vermicular graphite at the edge of the sample is the primary cause for fatigue crack initiation in the lower temperature range. The weakening region comprised of multiple vermicular graphite particles facilitates the gradual extension of cracks. At higher peak temperature, oxidation rapidly erodes the interface between the vermicular graphite and the matrix, which leads to the debonding of graphite and initiation of the fatigue cracks. The rapid oxidation effect accelerates the corrosion of the metal matrix, promoting crack propagation, which is the primary factor contributing to the reduction of fatigue life. Given the complexity and high cost associated with the TMF test, a method for predicting the TMF life by building the correlation between low-cycle fatigue and the TMF lives in terms of the hysteresis energy is proposed. This method enables rapid and accurate prediction of the TMF life through a relatively small amount of samples and simpler experiments, demonstrating significant industrial application potential.

{"title":"Thermo-mechanical fatigue damage mechanism and life prediction of compacted graphite iron with high strength","authors":"C.L. Zou , B.Z. Tan , Y.J. Zhang , J.C. Pang , F. Shi , A.L. Jiang , S.X. Li , Q.H. Wu , Z.F. Zhang","doi":"10.1016/j.ijfatigue.2025.108931","DOIUrl":"10.1016/j.ijfatigue.2025.108931","url":null,"abstract":"<div><div>The thermo-mechanical fatigue (TMF) damage mechanism of typical compacted graphite iron with high strength (RuT450) was investigated in different temperature ranges. The results indicate that the TMF life decreases as the peak temperatures rise from 400 °C to 500 °C. As the cyclic number increases, the maximum tensile stress shows slight cyclic hardening in the temperature range of 100 to 400 °C. Additionally, in the temperature range of 100 to 500 °C, the maximum compressive stress exhibits slight cyclic softening. The fatigue damage and crack propagation processes demonstrate that the tearing of vermicular graphite at the edge of the sample is the primary cause for fatigue crack initiation in the lower temperature range. The weakening region comprised of multiple vermicular graphite particles facilitates the gradual extension of cracks. At higher peak temperature, oxidation rapidly erodes the interface between the vermicular graphite and the matrix, which leads to the debonding of graphite and initiation of the fatigue cracks. The rapid oxidation effect accelerates the corrosion of the metal matrix, promoting crack propagation, which is the primary factor contributing to the reduction of fatigue life. Given the complexity and high cost associated with the TMF test, a method for predicting the TMF life by building the correlation between low-cycle fatigue and the TMF lives in terms of the hysteresis energy is proposed. This method enables rapid and accurate prediction of the TMF life through a relatively small amount of samples and simpler experiments, demonstrating significant industrial application potential.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"197 ","pages":"Article 108931"},"PeriodicalIF":5.7,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143644062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A TCN-based feature fusion framework for multiaxial fatigue life prediction: Bridging loading dynamics and material characteristics 基于 TCN 的多轴疲劳寿命预测特征融合框架：衔接加载动力学和材料特性

IF 5.7 2区材料科学 Q1 ENGINEERING, MECHANICAL

International Journal of Fatigue

Pub Date : 2025-03-10 DOI: 10.1016/j.ijfatigue.2025.108915

Peng Zhang , Keke Tang

Multiaxial fatigue represents one of the most prevalent and critical fatigue issues in engineering applications, yet its life prediction remains challenging due to the combined effects of material characteristics and dynamic loading paths. This study proposes a cross-material adaptive framework that innovatively fuses dynamic loading sequence features with material properties through an attention-based mechanism. The framework employs lightweight Temporal Convolutional Networks (TCN) for temporal feature extraction while considering frequency-domain features, and incorporates both static and cyclic material properties as structured inputs. The attention-based fusion mechanism enables adaptive integration of temporal and material features, enhancing the model’s ability to capture complex interactions between loading conditions and material characteristics. To validate this approach, a multiaxial fatigue dataset comprising 499 data points was established across six major categories of metallic materials. The model’s performance underwent rigorous evaluation using hierarchical nested cross-validation, while key features were identified through SHAP analysis and recursive feature elimination. Results demonstrate that the proposed unified model exhibits robust predictive performance, with TCN showing superior stability and efficiency compared to other temporal feature extraction methods. Furthermore, the study explores cross-material prediction, revealing that fine-tuning with a small proportion of new material data can significantly enhance prediction accuracy. This research provides a novel approach to multiaxial fatigue life prediction while laying the groundwork for future cross-material prediction capabilities.

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