【摘要】 本文采用拟全量理论，分析了裂尖区的非比例加载情况，并从理论上导出不同屈服程度下塑性能密度Ｗ，场的统一表达式，有限元场分析证实了此表达式的正确性。更多还原

【Abstract】 The case of nonproportional loading and the plastic dissipation of neartip field is discussed in this paper.A unified expression of plastic energy density is theoretically derived byapplying the quasideformation plasticity theory and is verified by numerical solution of different;pecimen types and different extents of yielding.更多还原