Fire stability of glass-fibre sandwich panels: The influence of core materials and flame retardants

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• 作者：A. Hö ; rold^a ; B. Schartel^a ; ^{bernhard.schartel@bam.de} ; V. Trappe^a ; M. Korzen^a ; J. Bü ; nker^b
• 关键词：Fire resistance ; Fire stability ; Glass-fibre-reinforced plastics ; Composite ; Core materials
• 刊名：Composite Structures
• 出版年：2017
• 出版时间：15 January 2017
• 年：2017
• 卷：160
• 期：Complete
• 页码：1310-1318
• 全文大小：3066 K
• 卷排序：160

文摘

Fire resistance has become a key property for structural lightweight sandwich components in aviation, shipping, railway vehicles, and construction. The development of future composite materials and components demands adequate test procedures for simultaneous application of compression and fully developed fire. Therefore an intermediate-scale approach (specimen size = 500 mm × 500 mm) is applied with compressive loads (up to 1 MN) and direct application of a burner to one side of the specimens, as established in aviation for severe burn-through tests. The influence of different core structures (polyvinylchloride foam, polyisocyanorate foam reinforced by stitched glass bridges, and balsa wood) was investigated for glass-fibre-reinforced sandwich specimens with and without flame retardants applied on the fabrics, in the matrix, and on surface for each specimen at the same time. Times to failure were increased up to a factor of 4. The intumescent coating prolongs the time to failure significantly. What is more, using the intrinsic potential of the front skin together with the core to protect a load bearing back skin in sandwich panels, the design of the core – here using the wood core – is the most promising approach.