干涉云纹全场应变花

A WHOLE-FIELD STRAIN ROSETTE IN MORE INTERFEROMETER

本文提供了一个简便实用的二维贴片云纹测试方法。它能在同一加载状态下、从同一张全息底片上获得四个方向的等位移云纹图象。图象中所包含的应变信息量及其对应变分析的功用远大于四片式电阻应变花的测试结果,我们权且称之为“干涉云纹全场应变花”。文章对该测试方法的原理作了详尽的论证,推导了所有的技术参数并列举了应用简例,从理论和实践两个方面证实了该方法的可行性。

This paper suggests a simple and practical measuring method for the More inter- ferometry by which the 2D interference of fringes on a adhensive plate may bephotographed.By this method,the More diagram of equal displacements in fourdirectious can be obtained from one holographic photograph.The amount of straininformation and its message imparting to the strain analysis are much greaterthan that of the measuring result of the strain rosette with four sheets.As asuggestion,the author called this method as“The whole Strain Rosene in MoreInterferometry”.This paper actually provides the theory of this method,thederivation of all technical parameters,the verification of the feasibility of thismethod and examples.