Proc. 6th International Conference on Deformation and Failure of Composites, pp. 357-365, 2001.


EXPERIMENTAL AND NUMERICAL DETERMINATION OF THE INTER-LAMINAR SHEAR STRENGTH FOR SHORT-BEAM-SHEAR AND DOUBLE-LAP-SHEAR SPECIMENS

D.H. Pahr¹, F.G. Rammerstorfer¹, P. Rosenkranz², K. Humer², H.W. Weber²

¹Institute of Lightweight Structures and Aerospace Engineering,
TU Wien, Vienna, Austria
²Atomic Institute of the Austrian Universities,
Vienna, Austria


Abstract - 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 analyses. 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 double-lap-shear test. Therefore, the notched-shear test is not suited for predicting the ILSS, if standardized ILSS-evaluation procedures are applied.


(hjb,010423)