Modelling of spall damage in ductile materials and its application to the simulation of plate impact on copper

doi:10.1088/1674-1056/21/9/094601

Abstract A statistical model of dynamic spall damage due to void nucleation and growth is proposed for ductile materials under intense loading, which takes into account inertia, elastic-plastic effect, and initial void size. To some extent, void interaction could be accounted for in this approach. Based on this model, the simulation of spall experiments for copper is performed with the Lagrangian finite element method. The simulation results are in good agreement with experimental data for the free surface velocity profile, stress record behind copper target, final porosity, and void concentrations across the target. The influence of elastic-plastic effect upon the damage evolution is explored. The correlation between the damage evolution and the history of the stress near the spall plane is also analyzed.

Keywords: spall damage ductile materials free surface velocity plate impact

Received: 17 November 2011
Revised: 06 April 2012
Accepted manuscript online:

PACS:	46.50.+a	(Fracture mechanics, fatigue and cracks)
	46.40.-f	(Vibrations and mechanical waves)

Fund: Project supported by the Science and Technology Development Foundation of China Academy of Engineering Physics (Grant Nos. 2009A09027 and 2009A09006).

Corresponding Authors: Zhang Feng-Guo
E-mail: zhang_fengguo@iapcm.ac.cn

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Zhang Feng-Guo (张凤国), Zhou Hong-Qiang (周洪强), Hu Jun (胡军), Shao Jian-Li (邵建立), Zhang Guang-Ca (张广财), Hong Tao (洪滔), He Bin (何斌) Modelling of spall damage in ductile materials and its application to the simulation of plate impact on copper 2012 Chin. Phys. B 21 094601

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Modelling of spall damage in ductile materials and its application to the simulation of plate impact on copper

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