金属材料振动环境下的本构关系

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There is obvious decrease on the stress-strain curves of the metal materials under vibration condition than normal condition. The constitutive relationships of them under vibration condition differ from these under static tensile test. Thus, the existing elastic-plastic model can not be employed to describe the mechanical behaviors of metal materials under vibration condition. An experimental system for mechanical behavior test for metal materials under vibration condition was established. The special mechanical behaviors of metal materials were investigated. The special phenomenon of metal materials under such load was analyzed. The effect of vibration parameters on the stress-strain relationship of metal materials was obtained. The results are expected to provide references for proper control of production process of metal materials. 2figs., ltab., 8refs.金属材料在振动载荷下的应力一应变曲线较常规情况明显降低，材料的本构关系与静态拉伸情况下的本构关系有明显的不同，因而不能直接引用现有的弹塑性模型来描述．作者通过建立振动载荷下材料的力学行为实验系统，研究了金属材料在振动条件下的特殊力学行为，分析了材料在振动作用下的特殊现象，得出了振动参数对金属材料的应力一应变曲线的影响规律，可为合理控制金属材料的加工过程提供有利的技术数据．图2，表1，参8．