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Research on Elastic and Elastic-Plastic Buckling Load of Cylindrical Shell with an Inclined through Crack under Axial
Zhuo-Wu Wang1,2, Jian Tang1,2, Shou-Chao Li1,2
1School of Mechanical and Power Engineering, Nanjing Tech University, Nanjing 211816, China.
Materials (Basel, Switzerland)
|September 28, 2023
Summary
This study tested cracked cylindrical shells to understand buckling loads. Crack inclination positively impacts load capacity, while other factors like crack length decrease it, validated by finite element analysis.
Area of Science:
- Mechanical Engineering
- Materials Science
Background:
- Cylindrical shells are critical structural components.
- Understanding the impact of cracks on their load-bearing capacity is essential for safety and design.
Purpose of the Study:
- To experimentally and numerically investigate the elastic and elastic-plastic buckling behavior of cracked cylindrical shells.
- To analyze the influence of geometric parameters and crack characteristics on buckling load.
Main Methods:
- Conducted experimental buckling tests on 26 cracked cylindrical shell specimens (PMMA and 6063 aluminum alloy).
- Developed and utilized finite element models to simulate buckling behavior and compare with experimental data.
- Investigated parameters including length-diameter ratio, diameter-thickness ratio, crack length, and crack inclination.
Main Results:
- For PMMA shells, buckling load initially decreased then increased with length-diameter ratio.
- For aluminum alloy shells, increased length-diameter ratio, diameter-thickness ratio, and crack length reduced buckling load.
- Increased crack inclination led to a higher buckling load, enhancing load capacity.
Conclusions:
- Finite element simulations accurately predicted experimental buckling loads, especially with contact effects included.
- Crack inclination is a critical factor, with higher inclination improving load capacity.
- Findings offer valuable data for assessing the load capacity of cracked structures.
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