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纤维缠绕压力容器和火箭发动机壳体所用的芳酰胺纤维,其性能是由纤维强度和纤维一基体粘结力所决定的。用一种新的、强度更高且纤维—基体粘结力最佳的凯夫拉有机纤维,使压力容器的性能提高了50%。压力容器环向应力达到了3.55GPa,特性系数(PV/W)达到了40.4km。这种新纤维有较高的损伤容限。用于压力容器,其损伤容限为高应变石墨纤维(如IM—6)的十倍,是普通凯夫拉有机纤维的两倍。
Aramid fibers used in fiber wound pressure vessels and rocket motor housings are determined by the strength of the fibers and the bond of the fibers to the matrix. Using a new, more powerful, Kevlar organic fiber with the best fiber-matrix bond strength, the performance of the pressure vessel was increased by 50%. The circumferential stress of the pressure vessel reached 3.55GPa, and the characteristic coefficient (PV / W) reached 40.4km. This new fiber has a high damage tolerance. For pressure vessels, the damage tolerance is ten times that of high strain graphite fibers (such as IM-6), which is twice that of regular Kevlar organic fibers.