本文利用Eulerian坐标系下弹塑性大变形基本公式及分叉屈曲的理论,采用有限元数值法,探索平面应变条件下具有幂硬化弹塑性材料,在不同位移加载参数及不同原始孔洞体积百分数下,材料内部空洞的长大、剪切分叉以及材料宏观力学行为.计算结果表明,宏观材料的软化、塑性可膨胀性、内部损伤的发展以及剪切分叉的临界应变值等,都与加载参数α、原始空洞尺度有着密切的关系. In this paper, based on the basic formula of elasto-plastic large deformation in Eulerian coordinate system and the theory of bifurcated buckling, finite element numerical method is used to explore the power-hardening elastoplastic material under plane strain condition. Under different displacement loading parameters and different original volume percentage, The results show that the softening, plastic expansibility, the development of internal damage and the critical strain value of shear bifurcation are all related to the loading parameters α, the original empty scale has a close relationship.