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The simulation of a double cantilever beam test using the virtual crack closure technique with the cohesive zone modelling
Affiliation:1. Tampere University of Technology, Laboratory of Materials Science, P.O.B 589, FI-33101 Tampere, Finland;2. Patria Aviation, Lentokonetehtaantie 3, FI-35600 Halli, Finland;3. Aalto University, School of Engineering, Department of Mechanical Engineering, P.O.B 14300, FI-00076 Aalto, Finland;1. Federal University of Rio de Janeiro, Aloísio da Silva Gomes Ave, 50, 27930-560 Macaé, RJ, Brazil;2. Rio de Janeiro State University, Laboratory of Adhesion and Adherence, Bonfim St, 25, 28625-570 Nova Friburgo, RJ, Brazil;1. State Key Laboratory of Advanced Design and Manufacture for Vehicle Body, Hunan University, Changsha 410082, China;2. School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, Sydney, NSW 2006, Australia;1. Polymer Matrix Hybrid Composite Materials Group, Research Center for Structural Materials, National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan;2. Tohoku University, Department of Aerospace Engineering, 6-6-01, Aramaki Aza Aoba Aoba-ku, Sendai, Miyagi 980-8579, Japan;1. National Engineering Research Center of Biomaterials, Nanjing Forestry University, Nanjing 210037, China;2. School of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China;3. Jiangsu Co-Innovative Center for Efficient Application of Forestry Resources, Nanjing 210037, China;4. Department of Civil & Environmental Engineering, University of Alberta, Edmonton T6G1H9, Canada
Abstract:The fracture of an adhesively bonded joint is a complicated process of crack nucleation and propagation. In this work, a method for modelling the fracture process with separate nucleation and propagation phases is presented. The method combines the virtual crack closure technique (VCCT) with the cohesive zone modelling (CZM) on the finite element basis to take into account the development of fracture toughness. The method is applied to simulate a double cantilever beam (DCB) test as an example. Experiments using a butt joint specimen are carried out to support the adhesive characterization. The analysis focuses on the physical validity of the VCCT-CZM coupling and on the determination of applicable simulation parameter values. By using experimental data as a reference, the simulation results are compared to the results of traditional CZM and VCCT simulations. The comparison indicates that the applied combined CZM-VCCT method reproduces the DCB test cycles more accurately than the CZM and VCCT models.
Keywords:Fracture  Propagation  Damage criteria  Debonding  Virtual Crack Closure Technique  Cohesive Zone Modelling
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