An experimental and numerical study of the influence of local effects on the application of the fibre push-in tests

Molina Aldareguía, Jon M. and Rodriguez, M. and González Martínez, Carlos Daniel and Llorca Martinez, Francisco Javier (2010). An experimental and numerical study of the influence of local effects on the application of the fibre push-in tests. In: "XXVII Encuentro del Grupo Español de Fractura", 27/05/2010 - 29/05/2010, Oporto, Portugal.

Description

Title: An experimental and numerical study of the influence of local effects on the application of the fibre push-in tests
Author/s:
  • Molina Aldareguía, Jon M.
  • Rodriguez, M.
  • González Martínez, Carlos Daniel
  • Llorca Martinez, Francisco Javier
Item Type: Presentation at Congress or Conference (Article)
Event Title: XXVII Encuentro del Grupo Español de Fractura
Event Dates: 27/05/2010 - 29/05/2010
Event Location: Oporto, Portugal
Title of Book: Actas del XXVII Encuentro del Grupo Español de Fractura. Anales de Mecánica de la Fractura
Date: April 2010
Subjects:
Freetext Keywords: matrix composites; interfacial strength; push-in test; nanoindentation
Faculty: E.T.S.I. Caminos, Canales y Puertos (UPM)
Department: Ciencia de los Materiales
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Accelerated corrosion tests, Cohesive crack, Finite Elements simulations Several methods have been developed to test interfacial adhesion in composite materials such as pull-out, microbond and push-in/push-out tests. Some of them can only be applied to single fibre matrix composites and others are difficult to perform on brittle fibres due to premature fracture of the fibre. Push-in tests, consisting on pushing the fibre with a micro or nanoindenter on a bulk specimen, constitute a powerful technique that can be applied directly on composite laminates. However, the interfacial adhesion values obtained from different tests (microbond, push in) often differ and even are subjected to a large scatter. This might be due to the fact that the existing analytical solutions that are typically used to interpret the experimental data take into account the constrain effect of the surrounding fibres on a simplified manner. To study this, we have carried out a careful micromechanical modelling of the push-in test, coupled with experimental adhesion testing in a glass fibre reinforced epoxy matrix composite. The model takes into account the interfacial fracture process by means of interface cohesive elements at the fibre–matrix interface and focuses on the study of the constrain effects due to the local configuration of the surrounding fibres

More information

Item ID: 8500
DC Identifier: http://oa.upm.es/8500/
OAI Identifier: oai:oa.upm.es:8500
Official URL: http://www.gef.es/
Deposited by: Memoria Investigacion
Deposited on: 17 Aug 2011 10:39
Last Modified: 20 Apr 2016 17:15
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