Spall damage in aluminum alloy

Abstract

Abstract-Avoid growth relation for ductile porous materials under intense dynamic general loading conditions is presented. The mathematical model includes the influence of inertial effects, material rate sensitivity, as well as the contribution of void surface energy and material workhardening. Numerical analysis shows that inertia appears to resist the growth of voids. The inertial effects increase quickly with the loading rates. The theoretical analysis suggests that the inertial effects cannot be neglected at high loading rates. Plate-impact tests of aluminum alloy are performed with light gas gun. The processes of dynamic damage in aluminum alloy are successfully simulated with a finite-difierence dynamic code in which the theoretical model presented in this paper is incorporated.

Dynamic properties of 7000 - series aluminum alloys at large strain rates

“…Therefore occurrence of voids may be deemed equivalent to material deterioration or damage process. Such damage may be defined by means of a function dependent on stresses, plastic strain energy, pressure, strain rate and temperature [11].…”

The Effect of Orientation on the Spall Strength of the Aluminium Alloy 7010-T6

“…The behaviour of aluminium alloys under shock loading has been studied in some depth (4)(5)(6)(7). This is due to their low densities and (in some alloys at least) high strengths which has encouraged their use as light-weight armours and airframes.…”