Microscopic fatigue failure process in interleaved and toughness-improved CFRP cross-ply laminates
Abstract:Microscopic damage progress in CFRP cross-ply laminates under tensile fatigue loading was measured by the replica technique. Material systems were interleaved CFRP, T800H/3631-FM300 and toughness-improved CFRP, T800H/3900-2, with selectively toughened interlaminar layers. The damage parameter, the transverse crack density, was presented. A Paris law model was proposed, which related the cyclic strain range and the number of cycles at the transverse crack initiation. Based on the experimental data, a variational stress analysis combined with the modified Paris law was conducted to model the transverse crack multiplication.
Document Type: Research Article
Affiliations: 1: Center for Collaborative Research, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153, Japan 2: Departament of Mechanical Engineering, Faculty of Science and Technology, Science University of Tokyo, 2641 Yamasaki, Noda, Chiba 278, Japan 3: Japan Fine Ceramic Center, 2-4-1 Mutsuno, Atsuta-ku, Nagoya 456, Japan
Publication date: 1997-01-01