基于盲孔法的X7001挤压L型铝材残余应力测试研究  

Study on residual stress measurement of X7001 extrusion L aluminum based on blind hole method

作　　者：柴少磊 王柄楠 张晓晨 徐波 李燕 Chai Shaolei;Wang Bingnan;Zhang Xiaochen;Xu Bo;Li Yan(State Grid Ningxia Electric Power Co.,Ltd.,Yinchuan Ningxia 750001,China)

机构地区：[1]国网宁夏电力有限公司,宁夏银川750001

出　　处：《山西建筑》2024年第13期52-55,61,共5页Shanxi Architecture

基　　金：国网宁夏电力公司科技项目(SGNXJS00-JYJS2200155)。

摘　　要：采用盲孔法对3种截面规格的X7001铝合金挤压L型截面型材的纵向残余应力进行试验测量,基于试验结果分析了L型铝材的残余应力分布特点,给出了其残余应力分布建议图。结果表明:L型截面铝材残余应力分布呈对称模式;残余拉应力峰值略大于残余压应力峰值,且均不超过屈服强度的15%;生产工艺对构件残余应力分布模式有一定影响;残余应力系数β与构件宽厚比有关,建议普通L型截面X7001挤压型铝材的残余应力系数β的绝对值取值范围为0.08~0.15。The longitudinal residual stress of three kinds of X7001 aluminum alloy extruded L section profile was measured by blind hole method.Based on the test results,the characteristics of residual stress distribution of L aluminum were analyzed.The suggested map of residual stress distribution is given,and the simulation results are compared and analyzed.The results show that the residual stress distribution of L section aluminum is symmetrical,the peak value of residual tensile stress is slightly larger than the peak value of residual compressive stress,and does not exceed 15%of yield strength.The residual stress coefficientβis related to the width-thickness ratio.

关 键 词：盲孔法 铝合金 挤压型材 残余应力 分布模式 

分 类 号：TU317.3[建筑科学—结构工程]