Strain-based methodology for mixed-mode I plus II fracture: A new partitioning method for bi-material adhesively bonded joints

A new partitioning method for bi-material adhesively bonded joints

Journal article (2019)

Authors

M. Moreira Arouche Structural Integrity & Composites - Aerospace Engineering , Federal centre for technological education of Rio de Janeiro
W. Wang Structural Integrity & Composites - Aerospace Engineering
S. Teixeira De Freitas Structural Integrity & Composites - Aerospace Engineering
Silvio de Barros Federal centre for technological education of Rio de Janeiro, Université de Nantes
Research Group
Structural Integrity & Composites (Aerospace Engineering) (TU Delft)
Copyright: © 2019 M. Moreira Arouche, W. Wang, S. Teixeira De Freitas, Silvio de Barros
DOI: https://doi.org/10.1080/00218464.2019.1565756
Analytical models Finite element analysis Composites Fracture mechanics Mixed-mode fracture MMB test
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Published Date

01-06-2019

Language

English

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Faculty

Aerospace Engineering

Department

Aerospace Structures & Materials

Research Group

Structural Integrity & Composites

Abstract

The dissemination of composite materials introduces applications of hybrid structures with composite and metal parts. The development of reliable methodologies to evaluate the performance of these structures is required. In this work, the mixed-mode fracture behaviour of a bi-material adhesively bonded joint is investigated. A new strain-based criterion for the design of the mixed-mode bending (MMB) bi-material specimen is suggested. A new analytical partitioning method based on the ‘global method’ is proposed and tested on a composite-to-metal bonded joint and compared with a finite element model using the virtual crack closure technique (VCCT). The results show that the proposed strain-based design methodology can be successfully used in MMB test for bi-material joints. The fracture mode partitioning is accurately predicted by the analytical method. However, the absolute values of the strain energy release rate (SERR) predicted by the analytical method are only accurate if the shear deformation in the test is not significant.