建筑结构学报2024，Vol.45Issue(10)：217-228,12.DOI:10.14006/j.jzjgxb.2023.0352
高强度环槽铆钉ML40Cr材料单轴拉伸及低周疲劳性能研究
Uniaxial tensile and low-cycle fatigue performance of high-strength lockbolt ML40Cr materials
摘要
Abstract
To investigate the mechanical properties of lockbolt ML40Cr material under tensile and low-cycle fatigue,the experiment on lockbolt materials under axial tension and constant amplitude fatigue loading was conducted to obtain the plastic behaviour and the degradation of material properties.Furthermore,the fractography analyses were performed using electron scanning microscope(SEM)on tensile and fatigue specimens,and the underlying failure mechanisms were studied.The experimental results show that the lockbolt material does not exhibit distinct yield plateau in the axial stress-strain curve,and it has both deformation resistance and certain plasticity.The material has good low-cycle fatigue properties,and fatigue softening presents three-stage characteristics including initial rapid softening,smooth softening and later severe softening.Based on the test results,a modified Ramberg-Osgood model was proposed,which can predict the tensile stress-strain relationship with satisfactory accuracy.关键词
环槽铆钉/单调加载/循环加载/力学性能/Ramberg-Osgood模型/滞回性能Key words
lockbolt/monotonic loading/cyclic loading/mechanical property/Ramberg-Osgood model/hysteresis behavior分类
建筑与水利引用本文复制引用
徐菲,陆一安,周绪红,王宇航..高强度环槽铆钉ML40Cr材料单轴拉伸及低周疲劳性能研究[J].建筑结构学报,2024,45(10):217-228,12.基金项目
国家自然科学基金项目(52108116,52221002,52378130),中央高校基本科研业务费专项(2022CDJQY-009). （52108116,52221002,52378130）
