压电界面裂纹裂尖强度因子的显式计算公式

Determination of intensity factors for interfacial cracks in TIP materials

对常见横观各向同性压电材料(TIP)中界面裂纹的裂纹面与压电材料的极化方向成任意夹角的一般情况进行了研究,通过推导得到了计算裂尖强度因子的显式外推公式,同时给出了裂纹面与极化方向垂直的典型情况下的外推公式。这些显式计算公式为常见数值方法如有限元法及边界元法在压电材料断裂力学中的应用提供了便利。

An explicit extrapolating formula for a general case of the interracial crack plane lying with an angle to the poling axis in transversely isotropic piezoelectric （TIP） materials is derived,which is very feasible to dete.,＇mine the crack-tip intensity factors for numerical methods such as FEM or BEM. Additionally, a more concise extrapolating formula for the typical state of the interracial crack plane lying perpendicular to the poling axis is also presented in this paper.