Causes and remedies for porosity in composite manufacturing

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Abstract

Porosity is a challenge in virtually all composite processes but in particular in low pressure processes such as out of autoclave processing of prepregs, where the maximum pressure is one atmosphere. This paper discusses the physics behind important transport phenomena that control porosity and how we can use our understanding of the underlying science to develop strategies to achieve low porosity for these materials and processes in an industrial setting. A three step approach is outlined that addresses and discusses: gas evacuation of trapped air, volatiles and off-gassing, and resin infiltration of evacuated void space.

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Fernlund, G., Wells, J., Fahrang, L., Kay, J., & Poursartip, A. (2016). Causes and remedies for porosity in composite manufacturing. In IOP Conference Series: Materials Science and Engineering (Vol. 139). Institute of Physics Publishing. https://doi.org/10.1088/1757-899X/139/1/012002

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