Design of a High Payload Passive Shock Isolator using a Material Properties Test and Numerical Study on Hyper-elastic Materials

This study investigated the design procedure and method to develop a high payload elastic mount creating using a hyper-elastic material with the use of the finite-element method (FEM) and material properties tests. The design target static stiffness of the elastic mount was estimated based on the given base excitation signal and required shock absorption ratio. The stress-strain relationships of the materials were evaluated through single and bi-axial tension tests. The dimension and geometry effects of the mount were studied using the FEM based on the material test results. With the force-displacement test results with the prototype rubber mount, the proper numerical model for the hyper-elastic material was selected based on the similarity of potential energy between the test result of the prototype and numerical studies with various strain material test results. The evaluated method shall be applied to develop the final product with the numerical studies according to the variation of geometric design and material characteristics.