| 摘要 |
A base layer of fabric sheets impregnated with bonding material is deposited on a mold form. A plurality of parallel spaced hollow cores, fabricated from memory metal alloy, are positioned on the base layer. An overlying layer is then positioned over the cores and the base layer, the overlying layer also being impregnated with bonding material. The assembly is subjected to heat and pressure to cure all the layers. The core is then subjected to a critical temperature causing the core to shrink and permitting its easy removal. The result is a base layer to which the overlying layer is bonded, the overlying layer characterized by corrugations which stiffen the entire structure and increase its structural strength.
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