- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
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- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
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| Citation: | WANG Jiaming, TAN Yuedong, JIN Zhihui, YAN Liying, JI Cheng, LI Zhigang, SHAO Teli. Study on Compression Test and Equivalent Simulation Model of Aluminum Foam[J]. Journal of Southwest Jiaotong University, 2023, 58(1): 91-99, 116. doi: 10.3969/j.issn.0258-2724.20210563
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In order to investigate the effectiveness of aluminum foam for helicopter crashworthiness design, the mechanical properties of closed cell aluminum foam with two relative densities were tested at quasi-static (0.001 /s) and high strain rates (500 /s, 1000 /s) based on universal testing machine and Hopkinson bar, respectively. An equivalent finite element (FE) model of aluminum foam which considers the strain rate was established. The developed equivalent model of the aluminum foam with different relative densities was applied to the dropping simulation of a helicopter FE model. The crushing level and the deformation of the helicopter were investigated. The results show that the platform stress and mass specific energy absorption increase with relative density and strain rate, but the opposite is true for densification strain. The equivalent finite element model has high accuracy whose response curve can keep consistent with the experimental results. In addition, the maximum deformation of the helicopter floor has been reduced by 28% and 73% and the load-bearing pressure on each component has been reduced by 28% and 42% on average as the aluminum foam with different relative densities was added into the bottom cockpit of the helicopter. The load carrying capacity of aluminum foam with high relative density is higher and more effective.
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