| 钻孔法测试残余应力基础理论研究 |
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| 引用本文： | 王炎金,张初冬.钻孔法测试残余应力基础理论研究[J].大连铁道学院学报,1993,14(3):150-155. |
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| 作者姓名： | 王炎金 张初冬 |
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| 作者单位： | 大连铁道学院材料工艺系 92届硕士研究生 |
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| 摘 要： | 论述了传统钻孔法测试残余应力中存在的不完善之处。并对中心有一圆孔(包括穿孔与盲孔)的钢板,在各种载荷工况下,根据实际应力场与直角应变花测试的实际情况,用弹塑性FEM算得各种工况下的结点应变值,用结点数值的变化来模拟直角应变花测得数据,并计算出大量的已知应力场的直角应变花的三个释放应变。通过逐步回归的数学处理方法,建立了钻孔测试法中,残余应力与测试应变之间的关系式。
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| 关 键 词： | 有限元分析 残余应力 钻孔法 焊接 |
The Foundation Theory Study on the Method of Measuring Residual Stress by Hole-Drilling Techniques |
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| Wang Yanjin Zhang Chudong.The Foundation Theory Study on the Method of Measuring Residual Stress by Hole-Drilling Techniques[J].Journal of Dalian Railway Institute,1993,14(3):150-155. |
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| Authors: | Wang Yanjin Zhang Chudong |
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| Institution: | Dept.of Materical Technology |
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| Abstract: | Describes mistakes that the method of measuring residual stress by hole-drilling techniques exists, besides, for a steel plate that exists a circle hole in the centre (including through and blind hole), according to real stress fileds and measurement of a three-element rosette, computes every joints strain values in elastic plastic FEM in various operating mode, simulates the data that a three-element rosette measures through the changement of joints values, and computes three releasing strain of a three-element rosette in plenty of known stress fields. By mathematics stepwise regression method, establishs the formula between residual stress and relief strain values of the point measured to hole-drilling method. |
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| Keywords: | finite element analysis joints residual stress perforated plated stepwise regression/three-element rosette |
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