Plastic Limit Load and Failure of Accumulator Shell

CAI Penghui; LI Jinglin; SHEN Zhengxiang; ZHAI Binbin; WU Caibao; HUANG Huandong; SONG Pengfei

doi:10.11858/gywlxb.20210867

Volume 36 Issue 3

May. 2022

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Chinese Journal of High Pressure Physics > 2022 > 36(3): 034203.

CAI Penghui, LI Jinglin, SHEN Zhengxiang, ZHAI Binbin, WU Caibao, HUANG Huandong, SONG Pengfei. Plastic Limit Load and Failure of Accumulator Shell[J]. Chinese Journal of High Pressure Physics, 2022, 36(3): 034203. doi: 10.11858/gywlxb.20210867

Citation:

CAI Penghui, LI Jinglin, SHEN Zhengxiang, ZHAI Binbin, WU Caibao, HUANG Huandong, SONG Pengfei. Plastic Limit Load and Failure of Accumulator Shell[J]. Chinese Journal of High Pressure Physics, 2022, 36(3): 034203. doi: 10.11858/gywlxb.20210867

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Plastic Limit Load and Failure of Accumulator Shell

doi: 10.11858/gywlxb.20210867

1.
Ningbo Special Equipment Inspection & Research Institute, Ningbo 315048, Zhejiang, China
2.
College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, Zhejiang, China
3.
Faculty of Mechanical Engineering and Mechanics, Ningbo University, Ningbo 315211, Zhejiang, China

Received Date: 18 Aug 2021
Rev Recd Date: 31 Aug 2021
Issue Publish Date: 30 May 2022

Abstract

Abstract

Structural integrity is an important basis for the design and manufacture of hydraulic accumulator. In order to determine the maximum bearing capacity of an accumulator shell under internal pressure, the plastic limit load and failure location of the shell are studied based on elasto-plastic analysis, numerical simulation and experiments. The results show that the perfect elasto-plastic analysis is obviously higher due to the lack of consideration of the wall thickness. Although the strain strengthening effect is ignored, the calculation result of nonlinear finite element method using step-by-step iteration of load factor is very close to the measured value of the blasting test with an error of only 3.5%, and the predicted plastic failure is consistent with the actual fracture. It shows that the Risk method is more accurate and can be used for the analysis and design of simple thin-walled pressure vessels.
- accumulator,
- plasticity,
- limit load,
- nonlinear finite element,
- blasting

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References(23)

References

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