Creep behavior analysis of conical observation window for human occupied vehicle based on ABAQUS

DU Qinghai; JIANG Haigang; HU Xiaokang

doi:10.19693/j.issn.1673-3185.02247

Volume 17 Issue 1

Mar. 2022

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Article Navigation > Chinese Journal of Ship Research > 2022 > 17(1): 108-116

DU Q H, JIANG H G, HU X K. Creep behavior analysis of conical observation window for human occupied vehicle based on ABAQUS[J]. Chinese Journal of Ship Research, 2022, 17(1): 108–116 doi: 10.19693/j.issn.1673-3185.02247

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Creep behavior analysis of conical observation window for human occupied vehicle based on ABAQUS

doi: 10.19693/j.issn.1673-3185.02247

1.
Hadal Science and Technology Research Center, Shanghai Ocean University, Shanghai 201306, China
2.
College of Marine Science , Shanghai Ocean University, Shanghai 201306, China
3.
College of Engineering Science and Technology , Shanghai Ocean University, Shanghai 201306, China

Received Date: 2020-12-31
Rev Recd Date: 2021-03-21

Available Online: 2021-11-25

Publish Date: 2022-03-02

Abstract

This is an Open Access article distributed under the terms of the Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Objectives The observation window is the most important component of a human occupied vehicle (HOV) for personnel and structural safety. As such, it is extremely important to accurately calculate its creep performance under long-period loads. Methods First, based on the tensile specimen creep test data, when the specimen and observation window material is polymethyl methacrylate (PMMA), the basic parameters of the age hardening creep model are determined using a multi-parameter comparison and optimization method with reference to the test curves. The observation window structure is then modeled through ABAQUS. Coupled with the age hardening model and structural contact, the creep performance of the window structure is analyzed. Finally, based on the presented finite element model, the creep behavior of the observation window structure under the multi-parameter structure and different loading rates is carried out respectively. Results The calculation results show that the numerical and experimental test results are in good agreement under both the calculation verification model and physical observation window structure, revealing the reliability of the observation window structure creep model under high-pressure load. Based on age hardening, the numerical results of the creep model are in higher agreement with the real mechanical behavior of the observation window structure and actual engineering applications. The structure of the observation window with a conical angle of 70° under parametric optimization is more reasonable and optimized, and the stress level and creep performance of the structure are better. Under high pressure, the phenomena of "pits" near the center of the high-pressure surface of the observation window and "peeling" inside the window are the result of the structural creep response. Conclusions The results of this study on the creep behavior of the observation window structure based on the ABAQUS creep model are accurate and reliable, providing theoretical references for the design optimization and life analysis of manned submersibles.
- human occupied vehicle (HOV),
- conical observation window,
- creep,
- finite element analysis (FEA),
- design and optimization

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