| 复合型裂纹临界扩展研究 |
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| 引用本文： | 薛世峰,杨海元. 复合型裂纹临界扩展研究[J]. 中国石油大学学报(自然科学版), 1991, 0(4) |
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| 作者姓名： | 薛世峰 杨海元 |
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| 作者单位： | 石油大学机械系(薛世峰)，天津大学(杨海元) |
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| 摘 要： | 将弹性变形能沿包含裂纹尖端塑性区圆形围线上的积分作为裂纹扩展驱动力,建立了一种新型的复合断裂判据。较之仅着眼于纹尖场某一点的最小应变能密度因子理论,新判据更多地顾及到了尖端场的全局。实验结果证明,本文所提出的复合型断裂判据是简便可行的。
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| 关 键 词： | 金属材料 复合裂纹 裂纹扩展 临界扩展 |
CRITICAL GROWTH OF MIXED CRACKS |
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| Xue Shifeng Yang Haiyuan. CRITICAL GROWTH OF MIXED CRACKS[J]. Journal of China University of Petroleum (Edition of Natural Sciences), 1991, 0(4) |
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| Authors: | Xue Shifeng Yang Haiyuan |
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| Affiliation: | Department of Mechanical Engineering |
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| Abstract: | The line integral of the elastic strain energy along a circlesurrounding the plastic zone at the crack tip is taken as a driving force for mixed crack growth and a new fracture criterion is suggested.The new criterion includes the integral features of the whole field,while the theory of minimum strain-energy-density factor considers only a single point in the crack tip field.The experimental results show that the new criterion is simple and feasible. |
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| Keywords: | Metallic material Mixed Crack Crack growth Critical growth |
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