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Authors: Bamber Blackman, Fengzhen Sun, Sofia Teixeira de Freitas, Silvio de Barros, Marcio Moreira Arouche, Alojz Ivankovic

Abstract: This chapter discusses the mixed-mode loading of (opens in a new window)adhesive joints. The importance of mixed-mode loading is first introduced and then test methods commonly used to measure the mixed-mode (opens in a new window)fracture resistance of (opens in a new window)adhesive joints are presented and briefly discussed. The approaches to determine the (opens in a new window)fracture resistance are briefly reviewed and then the partitioning of mixed-mode (opens in a new window)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 (opens in a new window)longitudinal strain criterion is proposed in addition to the matching of flexural (opens in a new window)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.