Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 24    No. 10    October 2014

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Influence of dent on residual ultimate strength of 2024-T3 aluminum alloy plate under axial compression
Zhi-gang LI1,2,3, Ming-yi ZHANG1, Fu LIU1, Chun-sheng MA2, Jin-huan ZHANG2, Zhong-min HU1, Jia-zhen ZHANG1, Ya-nan ZHAO4

1. Beijing Aeronautical Science & Technology Research Institute of Commercial Aircraft Corporation of China, Ltd., Beijing 102211, China;
2. State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China;
3. School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China;
4. School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China

Abstract:Drop-weight impact tests were conducted on 2024-T3 aluminum plates with five types of impactors, and then the effects of the dent on the residual ultimate strength of the 2024-T3 specimens were investigated through axial compression tests. Results indicate that with increase in dent depth, the five types of dents affect the ultimate strength of the plate in different trends. Nevertheless, other than the plate global deflection caused by impacting, the dent itself has unremarkable effect on the ultimate strength. The mathematical expressions are derived regarding the relationship between impact energy factor and the dent depth factor as well as the compressive ultimate strength reduction rate and the dent depth factor.

 

Key words: aluminum alloy plate; impactor; dent; residual ultimate strength; compression

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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