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A computational study of the influence of thermal softening on ballistic penetration in metals

Yadav, S. and Repetto, E. A. and Ravichandran, G. and Ortiz, M. (2001) A computational study of the influence of thermal softening on ballistic penetration in metals. International Journal of Impact Engineering, 25 (8). pp. 787-803. ISSN 0734-743X. https://resolver.caltech.edu/CaltechAUTHORS:20150227-143957613

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Abstract

A two-dimensional axisymmetric computational study of the penetration of a tungsten heavy alloy (WHA) rod into a 6061-T6 aluminum target has been performed using a Lagrangian formulation. Adaptive remeshing has been used to alleviate the problem of excessive distortion of elements which occurs during large deformation studies (such as ballistic penetration). Strain hardening, strain-rate hardening and thermal softening in both the penetrator and target materials are taken into full consideration. The computed depth of penetration (DOP), residual penetrator length and maximum crater diameter match very well the experimental results reported by Yadav and Ravichandran (Int. J. Impact Eng., Submitted for publication) for an impact velocity of 1100 m/s. Computer simulations reveal that in the absence of failure mechanisms (such as shear banding), introduction of thermal softening in the penetrator material decreases its depth of penetration in a metal target, when compared to a penetrator material which does not soften thermally. These results are in contrast to the recent work of Rosenberg and Dekel (Int. J. Impact Eng. 21 (1998) 283–296) and a plausible explanation for this discrepancy is presented.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/S0734-743X(01)00008-2DOIArticle
http://www.sciencedirect.com/science/article/pii/S0734743X01000082PublisherArticle
Additional Information:© 2001 Elsevier Science Ltd. Received 21 May 1999; received in revised form 16 February 2001. This research was supported by the Dow Chemical Company which is gratefully acknowledged. MO is grateful for support from the Army Research Office under grant number DAAH04-96-1-0056.
Group:GALCIT
Funders:
Funding AgencyGrant Number
Dow Chemical CompanyUNSPECIFIED
Army Research Office (ARO)DAAH04-96-1-0056
Issue or Number:8
Record Number:CaltechAUTHORS:20150227-143957613
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20150227-143957613
Official Citation:S. Yadav, E.A. Repetto, G. Ravichandran, M. Ortiz, A computational study of the influence of thermal softening on ballistic penetration in metals, International Journal of Impact Engineering, Volume 25, Issue 8, September 2001, Pages 787-803, ISSN 0734-743X, http://dx.doi.org/10.1016/S0734-743X(01)00008-2. (http://www.sciencedirect.com/science/article/pii/S0734743X01000082)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:55343
Collection:CaltechAUTHORS
Deposited By: Cheryl Gause
Deposited On:04 Mar 2015 19:01
Last Modified:03 Oct 2019 08:05

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