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本文提出了二向应力状态下的动力应力-光定律的研究成果,并叙述了所用的设备和实验技术。二维动力应力-光定律的研究是用卡斯朵立脱(Castolite)制成的一组圆盘承受径向的冲击荷重来进行的。建立的卡斯朵立脱的动力应力-条纹关系近似地是线性的。动力条纹值略低于静力条纹值。所用的五个试件中的四个,其最大的差别是8.2%。以前关于动力应力-光定律的定度工作只限于单向应力的情况。在这次研究工作中使用了一台新的双线阴极示波器和二台双线插入式前置放大器。利用对称性,在一次单独的冲击作用时,可以将圆盘内任意一点处的三个应变分量及其对称点处的双折射记录在一张照片中。
This paper presents the research results of dynamic stress-law of light under two-dimensional stress and describes the equipment and experimental techniques used. The study of two-dimensional dynamic stress-law of light is carried out with a set of discs made of Castolite subjected to radial impact load. The established dynamic stress-stripe relationship of Castile is approximately linear. Dynamic stripe value slightly lower than the static stripe value. Of the five specimens used, the biggest difference was 8.2%. Previous work on dynamic stress-law of light was limited to unidirectional stress. A new two-wire cathode oscilloscope and two dual-wire plug-in preamplifiers were used in this work. Using symmetry, the three strain components at any point in the disc and the birefringence at their symmetry points can be recorded in a single photograph on a single impact.