Study of the Dynamic Response of Polymer-Matrix Composites Using an Innovative Hydraulic Crash Machine

摘要

This paper describes the design and implementation of a new innovative machine for hydraulic crash of composite materials. Polymer-matrix composite (PMC) plates with polyamide 11 (PA11) matrix/woven glass fibers were impacted with the new machine at 10 bars during 5 ms and their dynamic response, in terms of crash pressure and deflection at the pole, was evaluated respectively by two pressure transducers and a laser system. During the hydraulic crash test generating a shock wave within a metal enclosure, PMC plates undergo a tensile/compressive loading cycles which produce a damped vibration following the viscous aspect of the thermoplastic resin PA11. In view of the anisotropy and heterogeneity of composite materials, a numerical simulation with ABAQUS code has been proposed for predicting the dynamic behavior of PMC plates during the pressure rise phase of a proposed hydraulic crash cycle. Numerical deflection at the pole and the stresses field are investigated and compared with the experimental study. The obtained results show a very interesting potential of this machine for studying the dynamic behavior of composite structures under low-velocity impact test.