ON NONPROPORTIONAL CYCLIC PLASTIC BEHAVIOR OF STEEL 40

作     者：Cai Lixun Yang Xianjie, Southwest Jiaotong University, Chengdu 610031, P. R. China 

作者机构：Southwest Jiaptomg University Chengdu 610031 P. R. China 

出 版 物：《Acta Mechanica Solida Sinica》 (固体力学学报（英文版）)

年 卷 期：1995年第8卷第1期

页      面：84-93页

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：The project supported by National Natural Science Foundation of China 

主　　题：steel 40 nonproportional cyclic loading plastic flow hardening softening 

摘      要：An experimental investigation was carried out on the flow characteristic and hardening of steel 40 subjected to complex combined axial-torsional cyclic straining. For a specific cyclic strain path, the steel has mainly cyclic softening behavior when the strain amplitude is small. While with an increase of the effective strain amplitude, the softening becomes small, but there is the cyclic softening even though the steel is subjected to the cyclic loading by a square strain path. However, the steel has cyclic additional hardening by a nonproportional path, compared with the proportional cycling. Generally, the additional hardening is small and its historical effect is not obvious at small strain amplitude. The additional hardening is remarkable by a cross-triangular strain path of large strain amplitude. The memory of the history of nonproportional cyclic loading, the direction of plastic flow and the plastic modulus of the steel were also studied.