裂纹柔度法在7075铝合金板残余应力检测中的应用Evaluation of residual stresses in 7075 aluminum alloy plate using crack compliance method
张旦闻,刘宏昭,刘平
摘要(Abstract)：
运用裂纹柔度法检测了7075-T73、T7351、T7352铝合金板中的残余应力。试验发现:应变测量误差主要源自在试验后期试样重力的影响以局部温度变化的影响。在裂纹柔度法计算中引入权函数能有效的抑制测量误差,提高残余应力检测精度。用梁弯曲试验对裂纹柔度法试验结果作了验证,提出了权函数参数(t1,t2)的设置方法,试验结果与理论值取得良好一致。试验结果表明:铝合金板的预拉伸工艺可消除约90%的残余应力。压缩工艺可获得压缩的残余应力,对应力消除的效果最佳。
关键词(KeyWords)： 裂纹柔度法;权函数;残余应力;铝合金板
基金项目(Foundation): 国家自然科学基金资助项目(50571035)
作者(Author): 张旦闻,刘宏昭,刘平
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