• CN：11-2187/TH
  • ISSN：0577-6686
机械工程学报

›› 2004, Vol. 40 ›› Issue (10): 165-169.

• 论文 • 上一篇    下一篇

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应用解理断裂局部法预测任意应力—应变关系材料断裂韧度KIC的新方法

惠虎;李培宁;轩福贞;刘长军;曲家棣   

  1. 华东理工大学机械工程学院;上海核工程研究设计院
  • 发布日期:2004-10-15

NEW METHOD OF FRACTURE TOUGHNESS KIC PREDICTION FOR MATERIAL WITH ARBITRARY STRESS-STRAIN CURVE BY USING CLEAVAGE FRACTURE LOCAL APPROACH

Hui Hu;Li Peining;Xuan Fuzhen;Liu Changjun;Qu Jiadi   

  1. Mechanical Engineering School, East China University of Science and Technology Shanghai Design Institute of Nuclear Research
  • Published:2004-10-15

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摘要： 提出了采用解理断裂局部法模型预测任意应力—应变关系材料断裂韧度的新方法，并预测了国产A508-Ⅲ钢及16MnR钢在不同解理断裂概率时的断裂韧度，从理论上证明了对于大多数压力容器所使用的C-Mn钢，62%的解理断裂概率相对应的载荷是最有可能引起结构解理断裂的载荷，此时对应的断裂韧度值也最有可能接近材料真实的断裂韧度值。国产A508-Ⅲ钢及16MnR钢三点弯曲试样62%的解理断裂概率相对应的断裂韧度值与试验值较为接近。

关键词: 断裂韧度, 解理断裂, 局部法, 预测

Abstract: A new method of fracture toughness K1C prediction for material with arbitrary stress-strain curve by using cleavage fracture local approach is proposed in this paper. The fracture toughness of civil made steel as A508-Ⅲ 16MnR at different cleavage fracture probability are predicted by using the method. To most of pressure vessel carbon-manganese steels, cleavage fracture is likely to occur at the load corresponding to 62% cle-avage fracture probability. Hence, the fracture toughness corre-sponding to the load is the most possible fracture toughness of steels. The values of fracture toughness corresponding to 62% cleavage fracture probability is close to that of experiment.

Key words: Cleavage fracture, Fracture toughness, Local approach, Prediction

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