The simulation of a double cantilever beam test using the virtual crack closure technique with the cohesive zone modelling

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 coh...

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Bibliographic Details
Published in:International journal of adhesion and adhesives 2019-01, Vol.88, p.50-58
Main Authors: Jokinen, Jarno, Kanerva, Mikko, Wallin, Markus, Saarela, Olli
Format: Article
Language:English
Subjects:
Adhesive bonding
Adhesive joints
Bonded joints
Butt joints
Cantilever beams
Cohesive Zone Modelling
Computer simulation
Crack closure
Crack initiation
Crack propagation
Damage criteria
Debonding
Finite element method
Fracture
Fracture mechanics
Fracture toughness
Fractures
Modelling
Nucleation
Propagation
Simulation
Test procedures
Virtual Crack Closure Technique
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Summary: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.
ISSN:0143-7496
1879-0127
DOI:10.1016/j.ijadhadh.2018.10.015