非均质材料接合面裂缝缝端应力场位移场及应力强度因子表达式

The Stress Field,Displacement Field and Stress Intensity Factor Expressions Near Crack Tip in Interface Crack of Nonhomogeneous Materials

本文用无穷级数导出了非均质材料接合面裂缝缝端应力场、位移场及应力强度因子表达式,推出了平面问题非均质材料接合面裂缝缝端塑性区的边界曲线方程。

The stress field,displacement field and stress intensity factor expressions near the crack tip in interface crack of the nonhomogeneous materials are deduced by using in finite series in this paper.The boundary curve equation of the plastic zoon near the crack tip is obtained in plane problem.The stress and displacement components bear a relationship to power tinesr,having a relation to Sin(Elogr)and Cos(Elogr).The stresses and displacements near the crack tip appear an oscillatory state.Even if under the action of modeⅠ( or mode Ⅱ)load,there are the stress intensity factor K_Ⅰ and K_Ⅱ at the same time.The value of K_Ⅰand K_Ⅱ also have a relation to the ratio of elastic constants in crack two sides.