Abstract
A new cohesive element for the simulation of adhesive joints based on the phantom node method is presented. A discontinuity crosses the element following a predefined path on its midplane and divides it into two independent subdomains. The continuum on either side of the crack has its own displacement field and is integrated independently, and so is the interface. Two coupled material models are used: a cohesive zone model for the interface and an elastoplastic model for the continuum, which has been formulated as an associated plastic model with isotropic hardening based on the Drucker-Prager yield criterion. The parameters required by the two models can be determined experimentally. Since the cohesive and continuum models are contained in the same element, they can be set to interact with each other. This yields an element with coupled plasticity and fracture that allows the detailed simulation of adhesive joints by means of a single interface element across the adhesive thickness. The formulation has been implemented as a user element subroutine in Abaqus 6.13 and post-processed in Paraview.
| Original language | English |
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| Publication status | Published - 1 Jan 2015 |
| Event | 20th International Conference on Composite Materials, ICCM 2015 - Copenhagen, Denmark Duration: 19 Jul 2015 → 24 Jul 2015 |
Conference
| Conference | 20th International Conference on Composite Materials, ICCM 2015 |
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| Country/Territory | Denmark |
| City | Copenhagen |
| Period | 19/07/15 → 24/07/15 |
Funding
The first author acknowledges the grants AP2010-0977 and Est13/00902 (FPU program, Spanish Ministerio de Educación, Cultura y Deporte). This work has been partially funded by the Spanish Ministerio de Ciencia e Innovación (projects MAT2012-37552-C03-03 – partially funded with FEDER EU funds – and DPI2012-34465).
Keywords
- Adhesive joints
- Cohesive element
- Phantom node method
- Plasticity