Abstract
Sandwich structures have high energy absorption and blast mitigation capabilities due to their configuration. In the present chapter, a computational model using time domain spectral element method or spectral element method (SEM) developed by the authors for a sandwich beam with composite facesheets and a compliant core is explained. This computational model is developed based on extended high order sandwich panel theory (EHSAPT) in which higher order displacement functions are taken for the core in order to incorporate core compression. A brief explanation about the underwater explosion (UNDEX) phenomena and the loading is presented. The sandwich model and analytical model developed by Hayman (1995) are used to study the fluid–structure interaction (FSI) and response of sandwich structures to the UNDEX loading. Significant differences in the FSI responses of homogeneous and sandwich structures is shown. These studies will result in the design of an optimal configuration for blast resistant sandwich structures.
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