[SY-H5] Symposium H-5

[SY-H5] Microstructural Effects in the Dynamic Response of Random 3D Structural Polymeric Foams

^○Axinte Ionita, Brittany Branch, Brian M. Patterson, Brad E. Clements, Dana M. Dattelbaum, Alexander H. Mueller (Los Alamos National Laboratory, United States of America)

Polymeric foams materials can have various applications in engineering. We consider in this work the effect of the foam microstructure in the homogenized response of a random 3D structural polymeric foam under high dynamic mechanical loading conditions (shock). In the analysis, the microstructure of the foam is extracted from 3D computed micro-tomography. The mechanical response of the solid part of the foam is described in terms of deviatoric and pressure response. Using Direct Numerical Simulations (DNS), Finite Element Method (FEM) and the concepts of Micromechanics the average foam response to shock is determined. The results are compared with the 1D-shock equations for the homogenized case to determine the effect of fluctuating fields of physical quantities due to the randomness of the foam microstructure.

LA-UR-18-22612