The Mechanics of Ductile Rupture and Plasticity

本研究继续并完成了三维数值模拟 断裂过程中诱发的韧性断裂与塑性分析 增长 将进行具有非常精细网格的有限元计算 大规模屈服下裂纹的增长。 结果将 与小尺度下产生的近裂纹应力场相比， 屈服 钝化裂纹尖端附近韧性断裂的特殊情况 而平面应变裂纹在大范围屈服时的扩展将是 考虑了 三维数值分析结果将 提供了重要的新输入，以了解韧性力学 并将有助于开发金属中的计算机算法 例如用于拉伸、轧制和挤压的成形。

This research continues and completes a three-dimensional numerical analysis for ductile rupture and plasticity induced during crack growth. Finite element calculations with very fine meshes will be made for cracks growing under large-scale yielding. The results will be compared with near crack stress fields generated during small-scale yielding. Specific cases of ductile fracture near blunting crack tips and the growth of a plane strain crack in large-scale yielding will be considered. The three-dimensional numerial analysis results will provide significant new input to understand the mechanics of ductile crack growth and will help to develop computer algorithms in metal forming such as for drawing, rolling, and extrusion.