求主应力和的一个新方法—钻孔法

A New Method for Getting the Sum of Principal Stresses-the Hole Drilling Method

_传统的平面光弹性法只能提供模型中的等差线条纹,即主应力差值。本文所提新方法,通过在模型上钻孔可以帮助我们得到主应力和值。本文给出了主应力和的计算公式以及实验结果,并与理论值作了比较。

The traditional photoelastic method only offers the isochromatic fringesin model which indicate the difference of principal stresses. The new method,discribed in the paper may help us to get the sum of principal stresses bythe method of drilling hole in the model,whose calculation formulas for sol-ving sum of principal stresses has been established and test results gotten,which is confirmed as comparing with the theoreticals.