Plate-Gap Model of a Porous Solid and its Application to Impact by Reduced Density Projectiles

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Abstract:

The sensitivity of the peak axial pressure profiles, obtained using the impact model of an earlier report NASA CR-609, to a change in the Hugoniot function assumed for the reduced density projectiles is examined briefly. The previous Hugoniot function, based on the Los Alamos equation of state for aluminum, is replaced by one based on the Plate-Gap model of a porous solid due to Thouvenin. A modification of this model is described in detail and its comparison with existing experimental data for six porous materials and the predictions of the theoretically based equation of state due to Wagner and Bjork for aluminum is noted. Comparison is also made of calculated peak axial pressures obtained using the impact model for the case of normal density aluminum projectiles impacting aluminum with experimental data obtained from corresponding jet projector impact shots conducted by the General Motors Defense Research Laboratory.

Author(s):
Heyda, J. F.
Author Organization(s):
GENERAL ELECTRIC CO KING OF PRUSSIA PA
Pagination:
0042

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
NASA-CR-1140
Contract/Grant Number(s):
NAS-3-8512
Monitor Series:
NASA-E
 Subject Terms
Joint Capability Areas:
JCA_3.2_Engagement; JCA_3_Force Application; JCA_3.2.1_Kinetic Means; JCA_7.2.1_Mitigate Lethal Effects; JCA_7.2_Mitigate; JCA_7_Protection; JCA_5_Command and Control; JCA_5.2_Understand; JCA_5.2.3_Share Knowledge and Situational Awareness; JCA_5.4.5_Intuit; JCA_5.4_Decide
Communities of Interest:
Weapons Technologies
Descriptor(s):
*DENSITY, *AXIAL LOADS, *POROUS MATERIALS, IMPACT, ALUMINUM, EQUATIONS OF STATE
Field(s)/Group(s):
Metallurgy and Metallography, Mechanics
Keyword(s):
PLATE GAP MODEL
Report Date:
1968 Aug 01
Creation Date:
2001 Nov 07