Paper Title:
Numerical Evaluation of Micro- to Macroscopic Mechanical Behavior of Plastic Foam
  Abstract

In this study, we employ the two-dimensional homogenization model based on molecular chain network theory to investigate the micro- to macroscopic mechanical behavior of plastic foam under macroscopic uniform compression. A parametric study is performed to quantify the effect of a characteristic value of matrix, distribution and initial volume fraction of voids, and the macroscopic triaxiality of loading condition on the deformation behavior of the foam. The results suggest that the onset of localized shear band at the ligament between voids together with the microscopic buckling of the ligament leads to the macroscopic yield of the foam. The initial modulus and the macroscopic yield stress of the foam have no dependence on the characteristic value of matrix. Furthermore, as the microscopic buckling of the ligament is promoted in case of high initial volume fraction of voids and high triaxiality loading condition, the macroscopic yield point appears at early deformation stage. After the macroscopic yield, macroscopic strain hardening appears in the macroscopic response and a remarkable strain hardening is shown in case of high initial volume fraction of voids and high triaxiality loading condition due to the considerable increase of the density of the foam in these cases.

  Info
Periodical
Key Engineering Materials (Volumes 340-341)
Edited by
N. Ohno and T. Uehara
Pages
1025-1030
DOI
10.4028/www.scientific.net/KEM.340-341.1025
Citation
I. Riku, K. Mimura, "Numerical Evaluation of Micro- to Macroscopic Mechanical Behavior of Plastic Foam", Key Engineering Materials, Vols. 340-341, pp. 1025-1030, 2007
Online since
June 2007
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Jun Zhan, Gui Min Chen, Xiao Fang Liu, Qing Jie Liu, Qian Zhang
Abstract:Gyroscope is the core of an inertia system and made by machining process. Machining process imports large residual stress. The residual...
838
Authors: Joo Eon Park, Mitsugu Todo
Abstract:Novel reinforcements such as beam, film, and porous frame were developed to improve the mechanical properties of poly(L-lactide) (PLLA)...
303
Authors: Yi Zong Dang, Lu Wang, Qun Bo Fan
Chapter 2: Frontiers of Materials Science and Engineering
Abstract:The deformation micromechanism of Zr50Cu50 bulk metallic glasses under compress loading is studied by means of molecular dynamics. The...
723
Authors: Wojciech Wajda, Henryk Paul
Abstract:The paper describes the mechanism of deformation at 77 K of pure aluminum bicrystals of different grain orientations. The following...
108
Authors: Xu Dong Zhou, Xiang Ru Liu
Chapter 3: Materials Forming, Machining and Joining
Abstract:The researches of non-oriented silicon steel are mainly focused on the effect of main processing parameters on the microstructure and...
1468