M. Guden et Iw. Hall, DYNAMIC PROPERTIES OF METAL-MATRIX COMPOSITES - A COMPARATIVE-STUDY, Materials science & engineering. A, Structural materials: properties, microstructure and processing, 242(1-2), 1998, pp. 141-152
Three distinctly different metal matrix composites have been tested at
strain rates from quasi-static to approximate to 3000 s(-1). It was f
ound that the high strain rate response of each composite was determin
ed primarily by (a) the response of the matrix in the absence of any r
einforcement and (b) the damage formation and accumulation processes d
uring deformation. High strain rate behavior of the short fiber compos
ite was dominated by the matrix behavior at low strains but by fiber d
amage at high strains. The behavior of a whisker reinforced composite
was dominated by the matrix properties al all strains. Re-loading test
s produced increased fracture strains, indicating that adiabatic heati
ng accelerates fracture of composites by permitting the development of
local strain instabilities. (C) 1998 Elsevier Science S.A.