Paper Title:
Cellular Structures under Impact Loading
  Abstract

This paper presents a study of the strength enhancement under impact loading of metallic cellular materials as well as sandwich panels with cellular core. It begins with a review of likely causes responsible for the strength enhancement of cellular materials. A testing method using 60mm diameter Nylon Hopkinson pressure bars is used to investigate the rate sensitivity of various metallic cellular materials. In order to identify the factor responsible for the strength enhancement of those materials, an experimental analysis is performed on a model structure which is a square tube made of rate insensitive materials. Significant enhancement is experimentally observed under impact loading, whereas the crushing mode is nearly the same under both static and impact loading. Finally, an inversed perforation test on sandwich panels with an instrumented pressure bar is also presented. Such a new testing setup provides piercing force time history measurement, generally inaccessible. Testing results show a notable enhancement of piercing forces, even though the skin aluminum plates and the foam cores are nearly rate insensitive.

  Info
Periodical
Materials Science Forum (Volumes 539-543)
Main Theme
Edited by
T. Chandra, K. Tsuzaki, M. Militzer , C. Ravindran
Pages
1880-1885
DOI
10.4028/www.scientific.net/MSF.539-543.1880
Citation
H. Zhao, I. Elnasri, H. J. Li, "Cellular Structures under Impact Loading", Materials Science Forum, Vols. 539-543, pp. 1880-1885, 2007
Online since
March 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: Guo Yun Lu, Jianping Lei, Shan Yuan Zhang
147
Authors: Han Zhao, I. Nasri, Hui Jian Li
Abstract:This paper presents a experimental study of the strength enhancement under impact loading of metallic cellular materials as well as sandwich...
1137
Authors: Ryo Kubota, Akira Shimamoto, Daiju Numata, Kazuyoshi Takayama
Abstract:Magnesium alloy is the lightest metal that is used as a structural material. It has a higher specific tensile strength and specific...
129
Authors: Yong Gang Bao, Nian Mei Zhang, Xiao Peng Yan, Gui Tong Yang
Abstract:The perforation of composite laminated aluminum foam target against rigid projectiles is studied. The dynamic cavity expansion theory is...
1844
Authors: Xiao Wei Chen, Y.B. Gao, L.L. He
Special Session in Honour of Professor N.K. Gupta
Abstract:By employing the theoretical model of a rigid sharp-nosed projectile perforating the ductile metallic target plate, the present paper...
68