Simulation numérique du procédé de moulage par injection plastique

Abstract

The energy dissipation structures are an important functional parts used widely in engineering. The energy is absorbed with vast plastic deformation to protect the other parts from damage. Metallic foams exhibit a long plateau stress before densification desirable for the energy absorption applications. The size of this important regime significantly relies on the foam porosity. In this study, the influence of periodic foam porosity on the energy absorption under dynamic impact loading is examined using a 3D cell-based finite element models. The studied periodic foam samples are designed in SolidWorks using the ‘sphere subtraction method’, and the dynamic simulations were carried out with the FE code ABAQUS/Explicit. The impact absorption is analyzed and presented as a function of porosity. The results show that the strength of foams can be easily modified by controlling the porosity. In low porosity, a lateral deflection is observed causing a large deformation of the structure