| 冲击韧性与断裂韧性间关系的探讨 |
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| 引用本文： | 许昌淦,余刚. 冲击韧性与断裂韧性间关系的探讨[J]. 航空学报, 1990, 11(4): 182-187 |
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| 作者姓名： | 许昌淦 余刚 |
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| 作者单位： | 北京航空航天大学(许昌淦)，芬兰赫尔辛基工业大学(余刚) |
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| 摘 要： | 材料常规冲击试验的冲击韧性(αK)是工程上五大机械性能指标之一,已沿用多年,但一直没有明确的物理意义。本文利用近代发展的可测载荷-挠度曲线的冲击试验机,将测得实验结果区分为弹性变形功、塑性变形功、裂纹形成功与裂纹扩展功。据此明确了材料受冲击负荷时应力-应变的变化过程;同时,建立了断裂性能与冲击性能之间的关系,找到一种表征冲击负荷下材料断裂韧性的度量方法。
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| 收稿时间： | 1988-02-22; |
A DISCUSSION ON THE RELATIONSHIP BETWEEN IMPACT TOUGHNESS AND FRACTURE TOUGHNESS |
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| Beijing University of Aeronautics and Astronautics Xu Changgan Helsinki University of Technology,Finland Yu Gang. A DISCUSSION ON THE RELATIONSHIP BETWEEN IMPACT TOUGHNESS AND FRACTURE TOUGHNESS[J]. Acta Aeronautica et Astronautica Sinica, 1990, 11(4): 182-187 |
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| Authors: | Beijing University of Aeronautics Astronautics Xu Changgan Helsinki University of Technology Finland Yu Gang |
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| Affiliation: | 1. Beijing University of Aeronautics and Astronautics,2. Helsinki University of Technology, Finland |
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| Abstract: | The impact value, obtained from routine impact test is one of the five most important mechanical properties, but it is still lack of definite physical meaning. By lusing a modern advanced impact testing machine in which the load-deflection curve can be measured, and the work for elastic deformation, plastic deformation, crack initiation and crack propagation can be differentiated. Fom this the stress-strain relationship during impact loading can be determined, and the relationship between fracture and impact pioperties can be established also. Therefoie, a method foi characterizing the fractme toughness of materials under impact loading was found. |
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| Keywords: | impact toughness fracture toughness load-flexibility cuive. |
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