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Coupon Tests on z‐Pinned and Unpinned Composite Samples for Damage Resistant Applications
Author(s) -
Lenzi F.,
Riccio A.,
Clarke A.,
Creemers R.
Publication year - 2007
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200750126
Subject(s) - coupon , composite number , composite material , materials science , structural engineering , engineering , business , finance
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.