An extended crystal plasticity model to simulate the deformation behaviors of hybrid stress–strain controlled creep-fatigue interaction loading. (March 2022)

• Record Type: Journal Article
• Authors: Zhou, Dewen; Wang, Xiaowei; Wang, Runzi; Zhang, Tianyu; Yang, Xinyu; Jiang, Yong; Zhang, Xiancheng; Gong, Jianming; Tu, Shantung
• Is Part Of: International journal of fatigue. Volume 156(2022)
• Publication Date: 2022-03
• Subjects: Crystal plasticity finite element -- Hybrid stress–strain controlled -- Creep-fatigue interaction -- Back stress evolution; Materials -- Fatigue -- Periodicals; Materials -- Fatigue; Periodicals; 620.1122
• DOI: 10.1016/j.ijfatigue.2021.106680
• Languages: English
• ISSNs: 0142-1123

Abstract

Highlights: Simulations of hybrid-controlled creep-fatigue interaction (HCFI) were performed. Simulated results of cyclic deformation matched well with the experimental data. Increase in computational time of the extended model was limited. Abstract: A numerical process based on crystal plasticity finite element method was implemented to describe the cyclic stress–strain response and especially the creep deformation of 9 %Cr steel under hybrid stress–strain controlled creep-fatigue interaction loading at 650 °C. An extended model based on Armstrong and Frederick (A-F) hardening law was used to capture the creep strain. Compared with experimental results, the creep strain performed by A-F model was small while extended model predicted well. The cyclic softening and decline tendency of relaxation have been simulated. Simulations of other loading modes with extended model also show a good agreement with experimental results.