Materials Reports  2022, Vol. 36 Issue (Z1): 20120211-5 |
| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Research on the Influence of Aspect Ratio and Strain Rate on the Energy Dissipation of Sepiolite Crushing |
| XU Changfeng1, ZHOU Youhang1,2, XIAO Jiaqi1, LI Yuze1, YI Qian1
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1 School of Mechanical Engineering, Xiangtan University, Xiangtan 411105, Hunan, China
2 Engineering Research Center for Complex Trajectory Processing Technology and Equipment, Ministry of Education, Xiangtan 411105, Hunan, China |
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Abstract In order to study the influence of aspect ratio and strain rate on the energy dissipation of sepiolite crushing, the split Hopkinson pressure bar (SHPB) was used to perform the dynamic compression tests on three sepiolite specimens with different aspect ratios under different strain rates. The results show that with the increase of the aspect ratio, the stress-strain curves of the sepiolite with the same aspect ratio have shown different changing laws. Under the same aspect ratio, the higher the strain rate is, the greater the absorption energy of the sepiolite sample will be, which will make the size of the broken pieces smaller and the number of powder increases. At the same level of strain rate, with the increase of the aspect ratio, the peak stress of the sepiolite sample keeps decreasing but the absorption energy increasing, and the broken form of the sepiolite sample changes from splitting to crushing. When the aspect ratio is larger and the strain rate is higher, the breaking degree of the sepiolite sample is greater and the breaking effect is better.
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Published: 05 June 2022
Online: 2022-06-08
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| Fund:National Natural Science Foundation of China (51775468) and Scientific Research Project of Hunan Provincial Department of Education (20A505). |
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