Paper Title:
Strength Prediction of Adhesively-Bonded Scarf Repairs in Composite Structures under Bending
  Abstract

This work reports on the experimental and numerical study of the bending behaviour of two-dimensional adhesively-bonded scarf repairs of carbon-epoxy laminates, bonded with the ductile adhesive Araldite 2015®. Scarf angles varying from 2 to 45º were tested. The experimental work performed was used to validate a numerical Finite Element analysis using ABAQUS® and a methodology developed by the authors to predict the strength of bonded assemblies. This methodology consists on replacing the adhesive layer by cohesive elements, including mixed-mode criteria to deal with the mixed-mode behaviour usually observed in structures. Trapezoidal laws in pure modes I and II were used to account for the ductility of the adhesive used. The cohesive laws in pure modes I and II were determined with Double Cantilever Beam and End-Notched Flexure tests, respectively, using an inverse method. Since in the experiments interlaminar and transverse intralaminar failures of the carbon-epoxy components also occurred in some regions, cohesive laws to simulate these failure modes were also obtained experimentally with a similar procedure. A good correlation with the experiments was found on the elastic stiffness, maximum load and failure mode of the repairs, showing that this methodology simulates accurately the mechanical behaviour of bonded assemblies.

  Info
Periodical
Materials Science Forum (Volumes 636-637)
Edited by
Luís Guerra ROSA and Fernanda MARGARIDO
Pages
233-238
DOI
10.4028/www.scientific.net/MSF.636-637.233
Citation
R. D.S.G. Campilho, M. F.S.F. de Moura, A.M.G. Pinto, D. A. Ramantani, J.J.L. Morais, J.J.M.S. Domingues, "Strength Prediction of Adhesively-Bonded Scarf Repairs in Composite Structures under Bending", Materials Science Forum, Vols. 636-637, pp. 233-238, 2010
Online since
January 2010
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Vladislav Kozák, Ivo Dlouhý, Zdeněk Chlup
Abstract:The micromechanical modelling encounters a problem that is different from basic assumptions of continuum mechanics. The material is not...
145
Authors: A.M.G. Pinto, A.G. Magalhães, Raul D.S.G. Campilho, Marcelo F.S.F. de Moura, A.P.M. Baptista
Abstract:Polyolefins are especially difficult to bond due to their non-polar, non-porous and chemically inert surfaces. Acrylic adhesives used in...
1157
  | Authors: N.G. Tsouvalis, K.N. Anyfantis
Abstract:The present work involves a numerical modelling of the Embedded Process Zone (EPZ) by utilizing the elastoplastic Mode I and Mode II fracture...
189
Authors: Vladislav Kozák, Zdeněk Chlup
Abstract:Ceramic matrix composites reinforced by unidirectional long ceramic fibre are very perspective materials. The only disadvantage of such...
231
Authors: Ai Min Jiang, Gao Chun Li, Ai Ping Tian
Chapter 4: Material Engineering and its Application Technology
Abstract:In order to analyze failure phenomena and mechanical properties of propellant-liner interface material, both experimental study and modeling...
291