Adiabatic shearing failure of explosively driven metallic cylinder shell, from experiments to simulation
1 MOE Key Laboratory of Impact and Safety Engineering, Ningbo University, Ningbo, Zhejiang 315211, China
2 Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900 Sichuan, China
a Corresponding author: firstname.lastname@example.org
Published online: 7 September 2015
The adiabatic shear bands (ASB) of the tubular metal specimens expanded explosively have been studied by many researchers in the recent years. The onset and evolutions of the multiple shear failure of metal cylinder under explosive loadings are affected by many factors such as the characteristics of the impulsive loadings, the dynamic behavior of the materials, etc. In this work, we investigate the failure and fragmentation of 45# steel cylinder shell driven by the JOB9003 explosive. Experimental and FEM numerical simulation investigations are made for cylinder modeled shell. The results show that for the perfect homogeneous FEM model, the failure mechanism of cylinder shell is differs from that of the experiments, in which the spalling originates is oriented by high intensity of rarefaction wave. Through numerical experiments, it was found that distributed geometrical defects of cylinder shell affect the fragmentation process and mechanism, in which the strain localization controlled by the defects and shear bands initiate on the inter-surface of the cylinder shell.
© Owned by the authors, published by EDP Sciences, 2015
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