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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.