Volume 14, Issue 2, 2005
Damage evaluation of
GLAREŇ4B under interlaminar shear loading at different temperature conditions
Stephan Hinz* , Jens Heidemann, Karl Schulte
Polymer Composites Section, Technische Universität Hamburg-Harburg, Nesspriel 5,
21129 Hamburg, Germany
*(Author to whom correspondence should be addressed)
(Received 6/04; accepted 4/05)
Abstract
The fibre reinforced metal laminate GLAREŇ4B was investigated under
interlaminar shear loading conditions at temperatures between –50°C and 110°C.
Short beam shear (ILSS) and double notched shear (DNS) tests were performed. The
interlaminar shear strength decreases strongly with increasing temperature. The
DNS test shows that the shear strain increases and the interlaminar shear
stiffness decreases with increasing temperature. The observed damage occurs
mainly in the 90°-fibre layer. For low temperatures delamination between the
fibre-layers is the dominant failure mode. The higher the temperature, the more
cracks develop in the 90°-layers. These multiple cracks coalesce with increasing
shear load and form the final fracture surface. Light and scanning electron
microscopy showed that the cracks are mainly based on fibre-matrix interface
failure.
