Abstract
Carbon fiber-reinforced plastics (CFRPs), with their excellent specific tensile strength, modulus, and fatigue strength, have been widely used in airframe structural applications, especially for aircraft structures. This is particularly due to requirements for light-weight and high-strength materials to reduce fuel consumption for economic and environmental reasons, while maintaining safety standards and durability. However, machining of CFRPs, for example, in the trimming process, often faces great concerns in terms of a high wear rate of the cutting tools, and the potential for fiber delamination. Common problems encountered during the machining process after laminating and curing the carbon fiber prepreg include burrs, a decrease in the machining accuracy caused by fiber pull-out, delamination, tool wear, and softening of the matrix resin. Therefore, this chapter aims to discuss the advancements achieved in various hole-making techniques in order to improve the machinability of CFRPs.
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