探讨一种新的复合型断裂判据——塑性区最短距离rmin判据
A New Criterion of Combined Type Crack—The Criterion of Minimum Distance rmin in Plastic Region
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摘要: 裂纹尖端塑性区的存在是抗裂的重要因素,在同一个塑性区上,哪个方向上塑性区距离最短(指裂纹尖端到塑性区边缘的距离),裂纹就最容易从哪个方向上扩展.Abstract: The existence of the plastic area around the crack tip is an important factor against the cracking. In this plastic region, the crack ing most likely develops in such a direction along which the distance from the existant crack tip to the plastic region edge is the shortest one.
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[1] Erdogan, F. and G, C. Sih, Tour, of Basic Engineering, 85, 4 (1963). [2] 酒井启一,《混合モード状态にすずける脆性破坏发生に关すろ考察》,株士会社,昭和52年. [3] 陈篪,《工程断裂力学》,国防工业出版社(1977). [4] 中国科学院力学研究所,复合型断裂准则评述,研究报告(1975). -
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