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绪言目前在航空、造船、土木建筑等方面都广泛应用正交异性板的光弹性试验来进行结构物的应力分析,一般皆认为这是一种良好的方法。作者主要是为了研究异性弹性地下坑道的应力状态,因此就应用即将介绍的光弹性薄膜贴片法(photoelastic coating)来研究正交异性板的圆孔应力集中问题。关于异性材料的应力测量试验已有了一些研究,林毅用环氧树脂(ポリェステル,リゴラツク2004)和以纵横性玻璃纤维制造的透明正交异性板,而正交两向的应变变化规律是由纵横性玻璃纤维来控制,进行直接透过式的光弹性试验,使光弹性效应通过树脂显示出来。由于纵横纤维密度的区别有限,其弹性模数与树脂的弹性模数又相差无
INTRODUCTION At present, the photoelastic test of orthotropic plates is widely used in aviation, shipbuilding, civil engineering and other fields to carry out stress analysis of structures, which is generally considered to be a good method. The author mainly aims to study the stress state of the opposite-shaped elastic underground tunnel. Therefore, the problem of stress concentration in the circular hole of orthotropic plates will be studied with the photoelastic coating to be introduced. Some studies have been conducted on the stress measurement test of the opposite-sex material. Lin Yi used an epoxy resin (POLYSTAR, Rielac 2004) and a transparent Orthotropic plate Control of vertical and horizontal glass fiber, the direct transmission through the photoelastic test, the photoelastic effect through the resin showed. Because of the difference between vertical and horizontal fiber density, the elastic modulus and elastic modulus of the resin and a difference of no