摘要
本文采用Hill弹塑性理论.合出正交各向异性材料Ⅲ型静止裂纹的尖端场,其结果表明:在裂纹尖端附近各向异性材料的应力应变奇异性与各向同性材料的结果相同.但它们的幅度受各向异性的影响.通过数值计算可以清楚地看出这种影响的结果并根据这些理论结果给出了合理的断裂准则.
Using a phenomenological elastoc-plastic theory proposed by Hill, the fields at the tip of a Mode III stationary crack in orthotropic material are given.It is found that the order of singularity of the stresses and strains in the vicinity of the stationary crack tip is the same as that in the case of isotropic materials, but their amplitudes are greatly influenced by the orthotropy.Through numerical calculation for fields the effects of the orthotropy can be seen clearly and reasonable fracture criteria can be established.
关键词
正交各向异性
静止裂纹
幂硬化材料
Power-law materials
orthotropy
stationary crack
Mode III
field near tip crack.
