Deployment angle

Experimental results show that the K_(Ⅱc) values change in range 17～35 MPa√m, the crack propagation initiation angle θ.

试验结果表明,Ⅱ型断裂参数在如下范围内变化:K_(Ⅲc)=17～35MPa2~(1/m),裂纹扩展开裂角θ_o=55°～62°,K_(Ⅱc)/K_(Ⅰc)=1。

This paper deals with the computing principle and the plotting method on development of a tangential surface connector according to the principle of descriptive geometry and the method of triangulated approximative development.

本文根据画法几何原理和分块三角形逼近展开的方法，论述了一种切线曲面接头展开图的计算原理和绘制方法。