Innovative test methodology for shelf life extension of carbon fibre prepregs
نویسندگان
چکیده
Abstract The aerospace industry makes extensive use of composite materials in the form fibre fabrics pre-impregnated with thermosetting resin, called prepregs. In order to minimize resin polymerization before curing, prepregs must be stored at -18°C (0°F). There are therefore expiration dates for use. Although manufacturers try storage time, offcuts and time out freezer, it is estimated that 30% 40% not used [1]. Today, recertification expired still complex expensive, generally chosen send landfill. purpose this work correlate physicochemical measurements loss mechanical performance point measure real aging effects during excessive time. Processability, tests were performed understand which truly representative ageing. This study was illustrated by testing on unidirectional Hexcel carbon/epoxy prepreg. Different expiry material studied properties compared. It shown main observed degradation processability prepreg while minimally degraded after date. could lead a simpler measurement actual rate prepregs, useful speed up procedures or propose new scenarios extend shelf-life [2].
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ژورنال
عنوان ژورنال: IOP conference series
سال: 2022
ISSN: ['1757-899X', '1757-8981']
DOI: https://doi.org/10.1088/1757-899x/1226/1/012101