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| 缺口边疲劳小裂纹扩展特性研究 | |
| 引用本文： | 李长春,赵慧霞,李光霞,郑旻仲. 缺口边疲劳小裂纹扩展特性研究[J]. 航空学报, 1991, 12(2): 115-119 |
| 作者姓名： | 李长春 赵慧霞 李光霞 郑旻仲 |
| 作者单位： | 华中理工大学(李长春，赵慧霞，李光霞)，飞机结构强度研究所(郑旻仲) |
| 摘 要： | 1.引言 工程构件中缺口根部常是产生小裂纹的部位。Smith,Miller和Hammoucla认为裂纹的萌生和早期扩展是由缺口的塑性应变区控制的,Haddad用J积分变程研究了缺口边小裂纹的扩展,本文用Haddad的J积分近似计算式分析试验结果,表明疲劳小裂纹和大裂纹扩展率可用有效J积分变程表达的公式统一描述。 |
| 关 键 词： | 小裂纹 J积分 裂纹扩展率 |
A STUDY ON SHORT FATIGUE CRACK GROWTH AT THE EDGE OF A NOTCH |
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| Huazhong University of Science and Technology Li Changchun,Zhao Huixia and Li Guangxia Aircraft Structure Strength Research Institute Zheng Minzhong. A STUDY ON SHORT FATIGUE CRACK GROWTH AT THE EDGE OF A NOTCH[J]. Acta Aeronautica et Astronautica Sinica, 1991, 12(2): 115-119 | |
| Authors: | Huazhong University of Science Technology Li Changchun Zhao Huixia Li Guangxia Aircraft Structure Strength Research Institute Zheng Minzhong |
| Affiliation: | 1. Huazhong University of Science and Technology;2. Aircraft Structure Strength Research Institute |
| Abstract: | Fatigue tests were carried out for single-edg notch specimens in order to study small crack propagation behaviour. Using the approximate formulae proposed by Haddad for computing J-integral, the experimental results are studied and a formula for predicting small crack growth rate expressed by the effective J-integral range ΔJeff is proposed. |
| Keywords: | small crack J-integral crack growth rate. |
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