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A mini review on manufacturing defects and performance assessments of complex shape prepreg-based composites

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Abstract

Autoclave processing is the most common method used for curing thermoset prepregs due to its capability to minimize void content. However, unresolved problems still exist in the prepreg manufacturing process, such as the inconsistent thickness, pores, voids, and resin-rich areas of the laminate panel. Until now, laminate thickness, resin distribution, and fiber wrinkling have been the key issues that have caught the attention of many researchers. In this review paper, defect-related factors involved in the manufacturing of complex laminated composites are identified, starting with the layup process itself and ending with the curing process. The occurrence rate of defects in complex shape laminate is affected by several factors, including mold selection, material characteristics, bagging configuration, and stacking sequence. The vacuum bagging process needs further attention as it has been identified as the most critical process following its high contribution to the issues of void content and resin accumulation. Various methods for quality measurements of complex shape laminate were also described in this review, specifically for the aspects of thickness uniformity, resin distribution, and inter-laminar defects.

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Acknowledgements

The authors would like to thank the Ministry of Higher Education, Malaysia and Universiti Sains Malaysia for the financial support for this research work.

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Hassan, M.H. A mini review on manufacturing defects and performance assessments of complex shape prepreg-based composites. Int J Adv Manuf Technol 115, 3393–3408 (2021). https://doi.org/10.1007/s00170-021-07421-8

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