Simulation of delamination in composites under high-cycle fatigue |
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| Affiliation: | 1. AMADE, Polytechnic School, University of Girona, Campus Montilivi s/n, 17071 Girona, Spain;2. DEMEGI, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal;3. NASA Langley Research Center, Hampton, VA, USA;1. Structural Methods and Allowables Group, The Boeing Company, Everett, WA 98204, United States;2. Department of Mechanical and Aerospace Engineering, University of Miami, Coral Gables, FL 33124, United States;1. Dept. of Materials and Production, Aalborg University, Fibigerstraede 16, DK-9220 Aalborg East, Denmark;2. AMADE, Polytechnic School, University of Girona, Universitat de Girona 4, E-17003 Girona, Spain;3. Generalitat de Catalunya, Spain;4. AERNNOVA Engineering Division SA, Llano Castellano Avenue 13, E-28034 Madrid, Spain;1. DMAS, ONERA, Université Paris Saclay, F-92322 Châtillon, France;2. LMT (ENS Paris-Saclay, CNRS, Université Paris Saclay), 61 avenue du Président Wilson, F-94230 Cachan, France;3. Safran Ceramics, A Technology Platform of Safran Tech, 105 Avenue Marcel Dassault, F-33700 Mérignac, France;1. Faculdade de Engenharia da Universidade do Porto, Departamento de Engenharia Mecânica, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal;2. IBM T.J. Watson Research Center, 1101 Kitchawan Road, Yorktown Heights, NY 10598, USA |
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| Abstract: | A damage model for the simulation of delamination propagation under high-cycle fatigue loading is proposed. The basis for the formulation is a cohesive law that links fracture and damage mechanics to establish the evolution of the damage variable in terms of the crack growth rate dA/dN. The damage state is obtained as a function of the loading conditions as well as the experimentally-determined coefficients of the Paris law crack propagation rates for the material. It is shown that by using the constitutive fatigue damage model in a structural analysis, experimental results can be reproduced without the need of additional model-specific curve-fitting parameters. |
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