Indexed by:会议论文

Date of Publication:2011-10-21

Included Journals:EI、CPCI-S、Scopus

Volume:105-107

Page Number:38-42

Key Words:Elbow; Flat-nosed missile; Penetration failure mode; Critical rupture kinetic energy

Abstract:Finite element model of the elbow interiorly impacted by flat-nosed missile was established using ANSYS/LS-DYNA. The Cowper-Symonds model was adopted. The rupture strain failure criterion was used to define the failure process. Numerical values were compared with experimental values obtained from the literature and the reliability of model was validated. The penetration failure mode of the elbow was analyzed. Factors of the critical rupture kinetic energy E-r were acquired. It can be seen that the penetration failure mode is plugging induced by the extrusion and scraping dominated of axis stress. The effect of D-o on E-r can be neglected. E-r increases with the increase of t/D-o, D-m/t and R/D-o when the missile mass m is invariable. The effect of m on E-r should consider the factors of m and critical rupture velocity V-r.