钛合金薄壁结构残余应力分布规律研究

摘要

'E' like specimen is designed to simulate thin wall structure being widely used, a numeri-cal simulation combined with experimental test method is used to investigate residual stress field. Experimental results show that the peened-surface exhibits compressing stress state and the unpeened surface exhibits tensional stress state, the thickness of wall affects the amount of ten-sional stress. The reaults will be useful for surface integra-tion and thin wall structure design.%设计了“E”形试验件模拟工程中常见的薄壁结构，采用试验与数值模拟相结合的方法研究此类结构表面强化后残余应力的分布规律。试验数据表明，受强化表面呈现压缩应力状态，未被强化一侧表面则呈现拉伸应力状态，壁厚是影响拉伸应力大小的因素之一，研究成果对提高钛合金薄壁结构设计水平、优化表面强化工艺具有重要意义。