In this paper, the numerical model was developed by using the commercial code LS/DYNA to investigate the dynamic response of sandwich panels with three PVC foam core layers subjected to non-contact underwater explosion. The simulation results showed that the structural response of the sandwich panel could be divided into four sequential regimes: (1) interaction between the shock wave and structure, (2) compression phase of sandwich core, (3) collapse of cavitation bubbles and (4) overall bending and stretching of sandwich panel under its own inertia. Main attention of present study was placed at the blast resistance improvement by tailoring the core layer gradation under the condition of same weight expense and same blast load. Using the minimization of back face deflection as the criteria for evaluating the blast resistant of panel, the panels with core gradation of high/middle/low or middle/low/high (relative densities) from the front face to back face demonstrated the optimal resistance. Moreover, the comparative studies on the blast resistance of the functionally graded sandwich panels and equivalent ungraded ones were carried out. The optimum functionally graded sandwich panel outperformed the equivalent ungraded one for relatively small charge masses. The energy absorption characteristics as well as the core compression were also discussed. It is found that the core gradation has a negligible effect on the whole energy dissipation of panel, but would significantly affect the energy distribution among sandwich panel components and the compression value of core.
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ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering
June 17–22, 2018
Madrid, Spain
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
978-0-7918-5122-7
PROCEEDINGS PAPER
Numerical Study on the Response of Functionally Graded PVC Foam Core Sandwich Panels Subjected to Non-Contact Underwater Explosion
Tianyu Zhou,
Tianyu Zhou
Huazhong University of Science and Technology, Wuhan, China
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Pan Zhang,
Pan Zhang
Huazhong University of Science and Technology, Wuhan, China
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Yuansheng Cheng,
Yuansheng Cheng
Huazhong University of Science and Technology, Wuhan, China
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Manxia Liu,
Manxia Liu
Huazhong University of Science and Technology, Wuhan, China
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Jun Liu
Jun Liu
Huazhong University of Science and Technology, Wuhan, China
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Tianyu Zhou
Huazhong University of Science and Technology, Wuhan, China
Pan Zhang
Huazhong University of Science and Technology, Wuhan, China
Yuansheng Cheng
Huazhong University of Science and Technology, Wuhan, China
Manxia Liu
Huazhong University of Science and Technology, Wuhan, China
Jun Liu
Huazhong University of Science and Technology, Wuhan, China
Paper No:
OMAE2018-77629, V003T02A018; 9 pages
Published Online:
September 25, 2018
Citation
Zhou, T, Zhang, P, Cheng, Y, Liu, M, & Liu, J. "Numerical Study on the Response of Functionally Graded PVC Foam Core Sandwich Panels Subjected to Non-Contact Underwater Explosion." Proceedings of the ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering. Volume 3: Structures, Safety, and Reliability. Madrid, Spain. June 17–22, 2018. V003T02A018. ASME. https://doi.org/10.1115/OMAE2018-77629
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