Understanding fracture mode-mixity and its effects on bond performance

Book chapter (2023)

Authors

Bamber Blackman Imperial College London
Fengzhen Sun Tongji University
S. Teixeira De Freitas Structural Integrity & Composites - Aerospace Engineering
S.R. De Barros LINEACT CESI Engineering School, Structural Integrity & Composites - Aerospace Engineering
M. Moreira Arouche Steel & Composite Structures - CEG
Alojz Ivanković University College Dublin
Research Group
Structural Integrity & Composites (Aerospace Engineering) (TU Delft)
Copyright: © 2023 Bamber Blackman, Fengzhen Sun, S. Teixeira De Freitas, S.R. De Barros, M. Moreira Arouche, Alojz Ivankovic
DOI
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https://doi.org/10.1016/B978-0-323-91214-3.00015-6
Partitioning Cohesive zone model Adhesive joint Bi-material interface Global approach Local approach Mode-mixity
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Published Date

2023

Language

English

Reuse Rights

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Faculty

Aerospace Engineering

Department

Aerospace Structures & Materials

Research Group

Structural Integrity & Composites

Abstract

This chapter discusses the mixed-mode loading of adhesive joints. The importance of mixed-mode loading is first introduced and then test methods commonly used to measure the mixed-mode fracture resistance of adhesive joints are presented and briefly discussed. The approaches to determine the fracture resistance are briefly reviewed and then the partitioning of mixed-mode fracture energies is discussed. The limitations of the local singular field and global approaches to mixed-mode partitioning are discussed and the use and application of a semianalytical cohesive zone analysis partitioning scheme is evaluated. The limitations of the global partitioning approach are further discussed in the context of developing a scheme to design and analyze adhesive joints with dissimilar adherends (a bi-material interface). A longitudinal strain criterion is proposed in addition to the matching of flexural rigidities and the approach is validated numerically. Finally, the practical issues of crack stability, failure path selection, and the use of mixed-mode failure envelopes is considered.