Abstract
Hole integrity is an aspect that needs to be evaluated in the application of joints. Bearing strength is one of the criteria for evaluating hole integrity. When using hole-making technologies, hole integrity may be affected by the mechanism used for hole-making. For instance, when using twisted drill bits, the ply of the composite may peel off or peel out at entry and exit, respectively, and the peeling may lead to delamination where the initial integrity of the panel is influenced by damage. Therefore the level of damage and influence on the property must be determined not only by using the existing methods for measuring delamination but also during the joining of panels by using fasteners. This chapter discusses the most commonly used fasteners in practice and the standard tests for measuring joint strength. Also discussed are the findings of recent studies and the available test standards for various types of composites. Then it explain the several types of failure modes that can be observed after the test and how these modes are assessed. Finally, the chapter highlights issues that need to be addressed in future works.
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