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The fibre reinforced metal laminate GLARE®4B 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.

Damage Evaluation of GLARE®4B under Interlaminar Shear Loading at Different Temperature Conditions