SIMULATION AND VALIDATION OF COMPOSITE FLUID STRUCTURE INTERACTIONS
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Authors
Carver, Benjamin
Subjects
composite
fluid structure interaction
shock wave
fluid structure interaction
shock wave
Advisors
Kwon, Young W.
Didoszak, Jarema M.
Date of Issue
2022-12
Date
Publisher
Monterey, CA; Naval Postgraduate School
Language
Abstract
As the U.S. Navy’s use of composite materials in marine structures expands, the material’s response to dynamic loading, especially that from underwater explosions, is becoming more vital to understand. To improve this understanding, the interaction between underwater shock waves and composite structures was studied through both experimental and computer modeling methods. A finite element method computer simulation was created using LS-DYNA software to model the experimental testing. LS-DYNA’s native use of an explicit solver enabled modeling of the very large deformations and complex interactions required for underwater explosions. The model simulated a gas expansion, pressure wave, and the subsequent fluid structure interaction with the sample materials. An Arbitrary LaGrangian Eulerian method was used to model the interaction between the test apparatus, expanding gas bubble, water and composite structure. The results showed that the model could be used for qualitative understanding of the underwater dynamics and limited quantitative analysis. The fluid structure interaction was also shown to be useful in that it predicted relative changes in the response to changing test conditions. The continued use of the computer model will enable future research on more complex structures, as well as exploration of the implosion component of underwater explosions.
Type
Thesis
Description
Series/Report No
Department
Mechanical and Aerospace Engineering (MAE)
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NPS Report Number
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Distribution Statement
Approved for public release. Distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States