| 球墨铸铁断裂韧度的可靠性分析 |
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| 引用本文： | 朱龙,徐人平.球墨铸铁断裂韧度的可靠性分析[J].机械强度,2002,24(2):293-294,297. |
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| 作者姓名： | 朱龙 徐人平 |
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| 作者单位： | 昆明理工大学机电工程学院,昆明,650093 |
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| 基金项目： | 云南省教委基金资助课题 (9842 0 51 ) |
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| 摘 要： | 通常球墨铸铁与其他铸铁材料一样被认为属于脆性材料，断裂韧度应该用线弹性力学理论进行研究。本文发现由于球墨铸铁中的石墨呈球状，当裂纹通过石墨时，裂纹扩展机理将发生相应的变化，结果显示用弹一塑性理论来研究球墨铸铁的断裂韧度是适应和有效的。对可靠度为95％球墨铸铁断裂韧度的区间估计进行分析，以便对工程中的断裂韧度提供相关的数据。
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| 关 键 词： | 球墨铸铁 断裂韧度 可靠性 |
RELIABILITY ANALYSES OF DUCTILE CAST IRON'S FRACIURE TOUGHNESS |
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| ZHU Long,XU Renping.RELIABILITY ANALYSES OF DUCTILE CAST IRON''''S FRACIURE TOUGHNESS[J].Journal of Mechanical Strength,2002,24(2):293-294,297. |
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| Authors: | ZHU Long XU Renping |
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| Abstract: | The ductile cast iron and the other cast iron usually belong to the brittleness material. It's the fracture toughness should studied by linear elastic mechanics. This paper found that the graphite in the ductile cast iron is sphere, when the crack traverses the graphite, the mechanism of crack growth will change accordingly too. The results show it is valid and adaptable that using elastic plasticity theory to study ductile cast iron's fracture toughness. The estimate of area of 95 percent reliability ductile cast iron's fracture toughness is analysed, to provide relative data of fracture toughness for project. |
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| Keywords: | Ductile cast iron Fracture toughness Reliability |
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