Abstract
Mechanical joints in composite structures are broadly used in many applications due to their accessibility for disassembly during maintenance. The capability of mechanical joints (bolted joints, pin joints, rivet joints, etc.) depends on the hole quality because the load transmitted via fastener gives rise to stress concentration around the hole-fastener boundary. This experimental study investigates the pattern on the effect of hole preparation techniques, namely, drilling and punching, on carbon-fiber-reinforced polymer with constant geometric parameters to the bearing strength and progressive failure analysis of the hole under tensile loading. A bearing test is conducted according to ASTM D5961 Procedure-A double shear with single-pin fastener using a modified fixture. The progressive failure modes resulting from the experiment are quantified and compared to those in literature. Results reveal clear differences in the bearing-response profiles plotted in the load–displacement graph between the drilling and punching techniques.
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Acknowledgements
The authors want to acknowledge Universiti Sains Malaysia for their sponsorship through Bridging Grant (Acc. No. 304/PMEKANIK/6316086).
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Abdullah, M.S., Abdullah, A.B., Hassan, M.H. et al. Bearing strength and progressive failure analysis of the punched hole of CFRP under tensile loading. Int J Adv Manuf Technol 97, 2163–2171 (2018). https://doi.org/10.1007/s00170-018-2091-x
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DOI: https://doi.org/10.1007/s00170-018-2091-x