一、一般介绍 偏振光测应力已有一百多年的历史,它已成为应力分析领域中一种有力的工具,在工程上得到了广泛的应用。由于生产的需要,光测法的研究也随着迅速地开展起来。 追溯光测法的发展应当从Brewster开始。1816年,他发现玻璃在应力作用下具有暂时双折射现象。当时,他用纯弯曲梁作试验,但未得到结果。四年以后,Fresnel又重复了 First, the general introduction of polarized light stress has been a hundred years of history, it has become a powerful tool in the field of stress analysis in engineering has been widely used. Due to the needs of production, the research of photometry has been carried out rapidly. Traceback should start with Brewster. In 1816, he found that glass had a temporary birefringence under stress. At the time, he tested with a pure curved beam, but did not get the result. Four years later, Fresnel repeated