The main objective of the work was to determine the mechanical properties of Z-pinned and unpinned composites samples. Tensile and interlaminar fracture tests under mode I have been carried out on thermoset polymer matrix composite samples composed of CYTEC 977-2 and carbon fibre yarn HTA-12K/35. The presence of the Z-pins has been found to significantly increase the interlaminar fracture toughness. The crack resistance improvement has been found to be accompanied by a small reduction of the in-plane stiffness properties for a Z-pins density of 2%. The results are presented in relation to the size and pinning quality and are rationalised on the basis of the location of Z-pin block within the sample.

Coupon tests on z-pinned and unpinned composite samples for damage resistant applications

RICCIO, Aniello;
2007

Abstract

The main objective of the work was to determine the mechanical properties of Z-pinned and unpinned composites samples. Tensile and interlaminar fracture tests under mode I have been carried out on thermoset polymer matrix composite samples composed of CYTEC 977-2 and carbon fibre yarn HTA-12K/35. The presence of the Z-pins has been found to significantly increase the interlaminar fracture toughness. The crack resistance improvement has been found to be accompanied by a small reduction of the in-plane stiffness properties for a Z-pins density of 2%. The results are presented in relation to the size and pinning quality and are rationalised on the basis of the location of Z-pin block within the sample.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11591/165694
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