Eventos Anais de eventos
MECSOL 2019
7th International Symposium on Solid Mechanics
Mode I and Mode II critical fracture energy characterization of an epoxy adhesive: Experimental and computational analyses
Submission Author:
Fernando Madureira , SP , Brazil
Co-Authors:
Fernando Madureira, Volnei Tita, Marcelo Leite Ribeiro
Presenter: Fernando Madureira
doi://10.26678/ABCM.MECSOL2019.MSL19-0134
Abstract
Abstract: Amongst the techniques for intralaminar fracture resistance of fiber composites the Double Cantilever Beam (DCB) and End Notched Flexure (ENF) are one of the most commonly applied. However, the standards methods available are complex and depends on real time crack length measurement, which it is difficult to perform and can easily lead to erroneous results. To overcome this problem the Compliance-based Beam Method (CBBM) has been the most commonly method used to obtain the adhesive fracture energies, since it requires only the data extracted from the Pvsδ curve (load-displacement). This work consists to obtain the fracture energy resistance in Mode I and Mode II of an epoxy adhesive respectively through Double Cantilever Beam (DCB) and End Notched Flexure (ENF) tests using the Compliance-based Beam Method (CBBM). The finite element software ABAQUS® and its embedded cohesive zone models (CZM) were used to perform the computational simulations for an estimation of the bond strength. Cohesive failure was achieved by grit blasting the adherents followed by cleaning with acetone. A constant adhesive thickness was guaranteed by placing nylon lines between the adherents. The CBBM method showed good agreement on comparing the experimental results with brittle epoxy adhesives data available in the literature.
Keywords
CBBM, CZM, Bonded joints, composite structures, Adhesives
