Journal Published Online: 26 March 2014
Volume 42, Issue 3

The Deformation Measurement and Analysis on Meso-Structure of Aluminum Foams During SHPB Test

CODEN: JTEVAB

Abstract

The split Hopkinson pressure bar (SHPB) is most widely used to measure the dynamic mechanical properties of materials. Such a testing methodology implies the assumption of uniform deformation during an impact test. However, the experimental verification of this assumption for aluminum foams has, as yet, been unreported. In this paper, a test system combining the SHPB with a high-speed digital camera was designed and constructed to study the problem. In the system, the synchronization between SHPB and the high-speed digital camera, the lighting, and the surface treatment of specimen are established. The deformation of meso-structure of aluminum foams during the SHPB impact was observed successfully; furthermore, the localized strains along the specimens were measured quantitatively. Experimental results show that the deformation is non-uniform; that means the assumption of uniform deformation for aluminum foam is not well satisfied. Therefore, a need exists for some modifications to characterize the dynamic mechanical properties of aluminum foams by SHPB.

Author Information

Yang, Bao
School of Civil Engineering and Transportation, State Key Laboratory of Subtropical Building Science, South China Univ. of Technology, Guangzhou, CN
Tang, Liqun
School of Civil Engineering and Transportation, State Key Laboratory of Subtropical Building Science, South China Univ. of Technology, Guangzhou, CN
Liu, Yiping
School of Civil Engineering and Transportation, State Key Laboratory of Subtropical Building Science, South China Univ. of Technology, Guangzhou, CN
Liu, Zejia
School of Civil Engineering and Transportation, State Key Laboratory of Subtropical Building Science, South China Univ. of Technology, Guangzhou, CN
Jiang, Zhenyu
School of Civil Engineering and Transportation, State Key Laboratory of Subtropical Building Science, South China Univ. of Technology, Guangzhou, CN
Fang, Daining
School of Civil Engineering and Transportation, State Key Laboratory of Subtropical Building Science, South China Univ. of Technology, Guangzhou, CN
Pages: 9
Price: $25.00
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Stock #: JTE20120254
ISSN: 0090-3973
DOI: 10.1520/JTE20120254