| Charpy裂纹试样的启裂点确定与动态断裂韧性 |
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| 引用本文： | 林君山,鄢文彬,涂铭旌.Charpy裂纹试样的启裂点确定与动态断裂韧性[J].金属学报,1992,28(4):28-33. |
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| 作者姓名： | 林君山 鄢文彬 涂铭旌 |
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| 作者单位： | 西安交通大学
(林君山，鄢文彬)，西安交通大学(涂铭旌) |
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| 摘 要： | 本文研究了用应变片测定Charpy裂纹试样动态断裂启裂点的方法,在不同的试验温度下,用双通道高速采样磁盘存储示波器同时测定了冲击试样的P—t曲线和裂纹尖端区域的名义ε—t曲线,结合动态有限元对Charpy裂纹试样冲击过程的模拟结果,分析了动态断裂韧性的测定方法,并指出了以往动态断裂韧性测定中存在的问题。
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| 关 键 词： | 启裂点 应变片 动态 断裂韧性 |
| 收稿时间： | 1992-04-18 |
| 修稿时间： | 1992-04-18 |
CRACK INITIATION POINT DETERMINATION AND DYNAMIC FRACTURE TOUGHNESS FOR CHARPY PRE-CRACKED SPECIMEN |
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| LIN Junshan,YAN Wenbin,TU Mingjing Xi''''an Jiaotong University.CRACK INITIATION POINT DETERMINATION AND DYNAMIC FRACTURE TOUGHNESS FOR CHARPY PRE-CRACKED SPECIMEN[J].Acta Metallurgica Sinica,1992,28(4):28-33. |
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| Authors: | LIN Junshan YAN Wenbin TU Mingjing Xi'an Jiaotong University |
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| Affiliation: | LIN Junshan;YAN Wenbin;TU Mingjing Xi'an Jiaotong University |
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| Abstract: | The method to detect the crack initiation point of Charpy pre-cracked specimen
under dynamic loading was studied using strain gauge. The load-time curve and nominal
strain-time curve at the crack tip for impact testing specimens may be simultaneously measured
by twin-channel oscilloscope with high speed sampling and diskette storing. Based on the dy-
namic finite element simulation of impact response of Charpy specimen, the measuring method
of dynamic fracture toughness was analysed and some problems in previous dynamic fracture
toughness measurement were discussed. |
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| Keywords: | crack initiation point strain gauge dynamic fracture toughness |
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