A Parametric Study on Crushability of Open-Cell Structural Polymeric Foams
- 226 Downloads
A five-parameter nonlinear phenomenological constitutive model, capable of capturing the entire stress-strain response of crushable polymeric foams, is presented. The functional form of each parameter in the model was determined using uniaxial-strain compression experiments on cylindrical foam specimens of different initial bulk densities (or porosities). Two-step and multistep loading procedures were employed during the uniaxial-strain compression experiments to investigate crushability and residual crushability of foams and to generate additional data at different porosity levels that were not originally available. Thus, specimens with certain initial low densities were repeatedly used to obtain stress-strain curves at increasingly high densities. Based on the experimental data, each parameter of the model was expressed in terms of initial bulk density (or porosity). Such relationships were shown to be useful in generating ‘crushability-maps’ that could be utilized to evaluate the residual crushability and/or for selection of a suitable density of foam for a given application.
Keywordsstructural foam crushability behavior constitutive model axial compression parametric study
Unable to display preview. Download preview PDF.
- 1.L.J. Gibson and M.F. Ashby, Cellular Solids, 2nd ed. (Cambridge University Press, 1997).Google Scholar
- 4.W.E. Warren and A.M. Kraynik, Journal of Applied Mechanics, Transactions of the ASME 64, 787–795 (1997).Google Scholar
- 6.R.K. McFarland Jr., AIAA Journal 1(6), 1380–1385 (1963).Google Scholar
- 10.A. Nagy, W.L. Ko and U.S. Lindholm, Journal of Cellar Plastics 10, 127–134 (1974).Google Scholar
- 12.C.C. Chou, Y. Zhao, G.G. Lim, and G.S. Song, SAE Technical Paper 980967 (1998).Google Scholar
- 13.O. Faruque, N. Liu, and C.C. Chou, SAE Paper No. 971076 (1997).Google Scholar
- 15.M.A. Puso and S. Govindjee, Mechanics of Plastics and Plastic Composites, MD-Vol 68/AMD-215, (ASME, New York, 1995) pp. 159–176.Google Scholar