Feasibility of the Extended Finite Element Method for the Simulation of Composite Bonded Joints

Raul D.S.G. Campilho; Arnaldo M.G. Pinto; Mariana D. Banea; Filipe J.P. Chaves; Lucas F.M.  da Silva

doi:10.4028/www.scientific.net/MSF.730-732.513

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HomeMaterials Science ForumMaterials Science Forum Vols. 730-732Feasibility of the Extended Finite Element Method...

Feasibility of the Extended Finite Element Method for the Simulation of Composite Bonded Joints

Abstract:

Adhesive-bonding for the unions in multi-component structures is gaining momentum over welding, riveting and fastening. It is vital for the design of bonded structures the availability of accurate damage models, to minimize design costs and time to market. Cohesive Zone Models (CZM’s) have been used for fracture prediction in structures. The eXtended Finite Element Method (XFEM) is a recent improvement of the Finite Element Method (FEM) that relies on traction-separation laws similar to those of CZM’s but it allows the growth of discontinuities within bulk solids along an arbitrary path, by enriching degrees of freedom. This work proposes and validates a damage law to model crack propagation in a thin layer of a structural epoxy adhesive using the XFEM. The fracture toughness in pure mode I (G_Ic) and tensile cohesive strength (s_n⁰) were defined by Double-Cantilever Beam (DCB) and bulk tensile tests, respectively, which permitted to build the damage law. The XFEM simulations of the DCB tests accurately matched the experimental load-displacement (P-d) curves, which validated the analysis procedure.

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Periodical:

Materials Science Forum (Volumes 730-732)

Pages:

513-518

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.730-732.513

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Cite this paper

Online since:

November 2012

Authors:

Raul D.S.G. Campilho, Arnaldo M.G. Pinto, Mariana D. Banea, Filipe J.P. Chaves, Lucas F.M. da Silva

Keywords:

Bonded Joints, Extended Finite Element Method (XFEM), Fracture Toughness

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