An investigation of shock load performance of viscoelastic gel filled corrugated core sandwich plates by finite element method

mine blast. In order to enhance the strength of armored vehicles against blast effects, materials that have high energy absorbing capability are preferred. In the presented Master Thesis, damping performance of sandwich plates consisting of core with corrugated geometry under the effect of shock wave was investigated with Finite Element Method. Four models were created for the first study. These four models were determined by samples in the shock tube tests. Then, performances under shock load were investigated with the Finite Element Method. Displacement-time changes obtained from the shock tests performed with the support of High-Speed cameras in the shock tube test device were used to verify the Finite Element Models. Finite Element Analyses were performed using Ls-Dyna. CONWEP blast model was created to obtain the same displacement values and blast analyses were performed. The displacement values in the blast analysis were compared and evaluated by shock test and shock analysis. The maximum displacements are very close to each other paved the way for a different model to be verified by only the blast analysis. As the second study, performances of alternative sandwich models obtained by filling cell cavities in corrugated core with ballistic gel filling (viscoelastic gel) method were investigated. Five models were created for the viscoelastic gel. Finite Element Analysis of viscoelastic gel filled sandwich designs were performed using CONWEP method. As a result, improvement provided by the viscoelastic gel filler to dampen the shock wave was revealed. Key words: Shock Test, Shock Analysis, Blast Analysis, CONWEP, Viscoelastic Gel