Date of download: 11/14/2017 Copyright © ASME. All rights reserved. From: Modeling of Dynamically Loaded Open-Cell Metallic Foams: Yielding, Collapse, and Strain Rate Effects J. Appl. Mech. 2010;77(3):031002-031002-8. doi:10.1115/1.4000386 Figure Legend: The effective response for foams with elastoplastic cell walls. The values for the variables in Eqs. were set to initial strut length Lo=1.0 mm, initial strut radius ro=0.3 mm, E=50 GPa, σyo=50 MPa, axial exponent r=4, axial exponent m=4, ϵpo=0.005, ϵ̇po=0.10, bending exponent r=4, bending exponent m=20, αpo=0.005, and α̇po=0.10. (a) The effective cell and plateau response for foams composed from struts with low initial yield stress such that the response involves a lot of plastic deformation. (b) The load and unload responses when the cell walls (struts) undergo plastic deformation.