Aft-body loading function for penetrators based on the spherical cavity-expansion approximation.

Longcope, Donald B., Jr. ; Warren, Thomas Lynn ; Duong, Henry

Sandia National Laboratories

关键词: Penetration Mechanics.;    99 General And Miscellaneous//Mathematics, Computing, And Information Science;    Computerized Simulation;    Penetrators;    Weapons Penetration Mechanics.;   

DOI  :  10.2172/986592
RP-ID  :  SAND2009-8295
RP-ID  :  AC04-94AL85000
RP-ID  :  986592

美国|英语

来源: UNT Digital Library

【 摘 要 】

In this paper we develop an aft-body loading function for penetration simulations that is based on the spherical cavity-expansion approximation. This loading function assumes that there is a preexisting cavity of radius a{sub o} before the expansion occurs. This causes the radial stress on the cavity surface to be less than what is obtained if the cavity is opened from a zero initial radius. This in turn causes less resistance on the aft body as it penetrates the target which allows for greater rotation of the penetrator. Results from simulations are compared with experimental results for oblique penetration into a concrete target with an unconfined compressive strength of 23 MPa.