摘要
本文研究了聚碳酸酯板的延性断裂特征;提出了修正的强化Dugdale条带屈服模型,并用实验-数值计算混合法确定了强化弹塑性材料裂纹顶端附近的应力场参数.实验测定结果与理论等色线,计算的裂纹前沿塑性区长度相符合.由此,验证了所提出的修正强化Dugdale条带屈服模型的合理性.
In this paper, the ductile fracture characters of polycarbonate plate are studied. A modified hardening Dugdale strip yield model is proposed. The stress filed around ductile crack tip is determined by hybrid experimental-numerical analysis method. Experimcntal results show good agreements with theoretical isochromatics and lengths of strip yield zones. So that the developed modified hardening Dugdale strip yield model is reasonable.
出处
《实验力学》
CSCD
北大核心
1990年第3期302-309,共8页
Journal of Experimental Mechanics
基金
华东工学院基金
关键词
聚碳酸酯
裂纹
弹塑性
板
Dugdale model
polycarbonate
fracture
