Proc. 6th International Conference on Deformation and Failure of Composites, pp. 357-365, 2001.
D.H. Pahr¹, F.G. Rammerstorfer¹, P. Rosenkranz², K. Humer², H.W. Weber²
¹Institute of Lightweight Structures and Aerospace
TU Wien, Vienna, Austria
²Atomic Institute of the Austrian Universities,
Two inter-laminar shear test specimens, short-beam-shear and double-lap-shear
specimens, are experimentally and numerically investigated.
Test results show a difference by up to 50\% in the obtained inter-laminar
shear strengths (ILSS) values between the two different specimen types.
Furthermore the "real" ILSS is evaluated numerically by using finite element
A comparison of experimental and numerical ILSS-values shows that both specimen
types underestimate the ILSS, but the short-beam-shear test is preferable under
static load conditions.
The numerical investigations demonstrate that the standardized ILSS-evaluation
procedures are valid for the short-beam-shear test, but fail in the case of the
Therefore, the notched-shear test is not suited for predicting the ILSS, if
standardized ILSS-evaluation procedures are applied.