Xiang Xu , Peilin Fu , Jianping Zhao , Xiaowei Wang , Jianming Gong , Guhui Gao , Qianhua Kan
{"title":"考虑循环软化对棘轮行为影响的改进无碳化物贝氏体钢循环塑性模型","authors":"Xiang Xu , Peilin Fu , Jianping Zhao , Xiaowei Wang , Jianming Gong , Guhui Gao , Qianhua Kan","doi":"10.1016/j.ijfatigue.2025.109192","DOIUrl":null,"url":null,"abstract":"<div><div>The effect of cyclic softening on the ratcheting deformation of carbide-free bainitic (CFB) rail steel is investigated experimentally. To accurately describe the cyclic softening behavior of CFB steel, two superimposed softening coefficients are introduced into the kinematic hardening rule, providing a unified description of the transient Bauschinger effect and cyclic softening. The isotropic hardening rule is enhanced by incorporating Ohno’s memory surface, enabling a more accurate representation of strain amplitude-dependent cyclic softening during ratcheting deformation. Furthermore, a modified kinematic hardening rule based on the Abdel Karim–Ohno model is developed by integrating a logical-function-based ratcheting parameter to account for the additional stress level dependence on the ratcheting behavior of CFB rail steel. The comparison between simulated results and experimental results demonstrates that the proposed model can effectively capture both the cyclic softening and ratcheting behaviors of CFB rail steel under various loading levels, histories, and control modes.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"201 ","pages":"Article 109192"},"PeriodicalIF":6.8000,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"An improved cyclic plastic model for carbide-free bainitic steel considering the influence of cyclic softening on ratcheting behavior\",\"authors\":\"Xiang Xu , Peilin Fu , Jianping Zhao , Xiaowei Wang , Jianming Gong , Guhui Gao , Qianhua Kan\",\"doi\":\"10.1016/j.ijfatigue.2025.109192\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>The effect of cyclic softening on the ratcheting deformation of carbide-free bainitic (CFB) rail steel is investigated experimentally. To accurately describe the cyclic softening behavior of CFB steel, two superimposed softening coefficients are introduced into the kinematic hardening rule, providing a unified description of the transient Bauschinger effect and cyclic softening. The isotropic hardening rule is enhanced by incorporating Ohno’s memory surface, enabling a more accurate representation of strain amplitude-dependent cyclic softening during ratcheting deformation. Furthermore, a modified kinematic hardening rule based on the Abdel Karim–Ohno model is developed by integrating a logical-function-based ratcheting parameter to account for the additional stress level dependence on the ratcheting behavior of CFB rail steel. The comparison between simulated results and experimental results demonstrates that the proposed model can effectively capture both the cyclic softening and ratcheting behaviors of CFB rail steel under various loading levels, histories, and control modes.</div></div>\",\"PeriodicalId\":14112,\"journal\":{\"name\":\"International Journal of Fatigue\",\"volume\":\"201 \",\"pages\":\"Article 109192\"},\"PeriodicalIF\":6.8000,\"publicationDate\":\"2025-07-25\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"International Journal of Fatigue\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0142112325003895\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, MECHANICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Fatigue","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0142112325003895","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}
An improved cyclic plastic model for carbide-free bainitic steel considering the influence of cyclic softening on ratcheting behavior
The effect of cyclic softening on the ratcheting deformation of carbide-free bainitic (CFB) rail steel is investigated experimentally. To accurately describe the cyclic softening behavior of CFB steel, two superimposed softening coefficients are introduced into the kinematic hardening rule, providing a unified description of the transient Bauschinger effect and cyclic softening. The isotropic hardening rule is enhanced by incorporating Ohno’s memory surface, enabling a more accurate representation of strain amplitude-dependent cyclic softening during ratcheting deformation. Furthermore, a modified kinematic hardening rule based on the Abdel Karim–Ohno model is developed by integrating a logical-function-based ratcheting parameter to account for the additional stress level dependence on the ratcheting behavior of CFB rail steel. The comparison between simulated results and experimental results demonstrates that the proposed model can effectively capture both the cyclic softening and ratcheting behaviors of CFB rail steel under various loading levels, histories, and control modes.
期刊介绍:
Typical subjects discussed in International Journal of Fatigue address:
Novel fatigue testing and characterization methods (new kinds of fatigue tests, critical evaluation of existing methods, in situ measurement of fatigue degradation, non-contact field measurements)
Multiaxial fatigue and complex loading effects of materials and structures, exploring state-of-the-art concepts in degradation under cyclic loading
Fatigue in the very high cycle regime, including failure mode transitions from surface to subsurface, effects of surface treatment, processing, and loading conditions
Modeling (including degradation processes and related driving forces, multiscale/multi-resolution methods, computational hierarchical and concurrent methods for coupled component and material responses, novel methods for notch root analysis, fracture mechanics, damage mechanics, crack growth kinetics, life prediction and durability, and prediction of stochastic fatigue behavior reflecting microstructure and service conditions)
Models for early stages of fatigue crack formation and growth that explicitly consider microstructure and relevant materials science aspects
Understanding the influence or manufacturing and processing route on fatigue degradation, and embedding this understanding in more predictive schemes for mitigation and design against fatigue
Prognosis and damage state awareness (including sensors, monitoring, methodology, interactive control, accelerated methods, data interpretation)
Applications of technologies associated with fatigue and their implications for structural integrity and reliability. This includes issues related to design, operation and maintenance, i.e., life cycle engineering
Smart materials and structures that can sense and mitigate fatigue degradation
Fatigue of devices and structures at small scales, including effects of process route and surfaces/interfaces.