The Study of HGM/ER Floating Material Sandwich Structures on High-speed Impact Damage

Abstract

Hollow glass microspheres/epoxy resin (HGM/ER) floating material sandwich structures are widely used in the field  of offshore engineering equipment. However, their complex mechanical properties and diverse failure modes make it  difficult to simulate the dynamic process itself, making it difficult to predict the dynamic failure behaviour and dynamic  response under the action of high-speed impact load. In this paper, the 3D Hashin failure criterion is used as the initial  criterion, and a continuous progressive damage model is constructed and verified by the experimental results. The  energy absorption effect of the HGM/ER floating material sandwich structure was accurately simulated. The effects  of the mass-filling rate of microbeads and the distribution of core thickness and panel thickness on the high-speed  impact response of sandwich structures are discussed. The results show that the panel under high-speed impact is the  main energy-absorbing part of the sandwich structure. The high-speed impact resistance of the sandwich structure  can be improved by increasing the filling rate of a certain mass of microbeads, and the high-speed impact resistance of  the sandwich structure with a thick front panel is more obvious. This research can provide a design basis for applying  HGM/ER floating material sandwich structure in offshore engineering equipment.