| 计测残余应力场的固有应变法研究 |
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| 引用本文： | 刘子顺,闵行,楼志文.计测残余应力场的固有应变法研究[J].西安交通大学学报,1987(4). |
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| 作者姓名： | 刘子顺 闵行 楼志文 |
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| 作者单位： | 西安交通大学工程力学系
(刘子顺)，工西安交通大学程力学系
(闵行)，西安交通大学工程力学系(楼志文) |
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| 摘 要： | 本文对残余应力固有应变的测定方法进行了深入的研究,从理论上分析了直接采用正规方程求解弱约束固有应变场时发生解的不稳定性的原因.采用修正的Gram-Sohmidt 正交化处理法求解固有应变场,解决了在各种约束状态下解的稳定性问题,完善和补充了文所提出的方法.
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| 关 键 词： | 固有应变 |
STUDY OF THE METHOD OF CALCULATING AND MEASURING RESIDUAL STRESSES USING INHERENT STRAINS AS PARAMETERS |
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| Liu Zishun Min Hang Lou Zhiw.STUDY OF THE METHOD OF CALCULATING AND MEASURING RESIDUAL STRESSES USING INHERENT STRAINS AS PARAMETERS[J].Journal of Xi'an Jiaotong University,1987(4). |
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| Authors: | Liu Zishun Min Hang Lou Zhiw |
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| Institution: | Liu Zishun Min Hang Lou Zhiw(?)n (Department of Engineering Mechanics) |
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| Abstract: | This paper discusses the method of calculating and measuring residual
stresses by use of inherent strains as parameters.In general,if the inherent
strain zone is not embeded in elastic domain,it is very difficult to obtain
stable results by way of normal solution.The unstable results appear espe-
cially when the inherent strain zone is located by the boundary of the body
or with only weak restraints.In this case,the solution of normal equation is
highly sensitive to small changes in the coefficient and large errors will be
introduced into the solution.In the present paper,a modified Gram-Schmidt
orthogonalization treatment is applied to above inherent strain parameters.In
this way,stable results can be obtained in any restrained case.The method
has been successfully generalized. |
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| Keywords: | inherent strain |
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