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本文报导了凯夫拉-49纤维缠绕的直径为5.75英寸各种压力容器的环向纤维应力特性,在这些容器制作中,分别采用了不同的环氧树脂系统,一种松粘剂预处理的纤维/环氧系统,一种环向纤维材料上不加树脂的系统以及一种未经预处理的系统。树脂系统以三类常用的环氧树脂为代表:刚性环氧树脂、半柔性环氧树脂、及橡胶增韧的粘性环氧树脂。曾通过压力容器试验温度的变化来导致纤维/基体界面的变化。由于纤维/基体的高度偶联,引起了压力容器中纤维拉伸性能的降低,其值为凯夫拉-49浸胶纱带公称拉伸强度的51-77%。本文并提出了解释这些现象的机理。
This paper reports the circumferential fiber stress characteristics of a variety of pressure vessels of 5.75 inch diameter wrapped with Kevlar-49 fibers. In these vessel designs, different epoxy systems were used, one of which was pretreated with a release agent Fiber / epoxy system, a resin-free system of toroidal fiber material and a system without pretreatment. The resin system is represented by three commonly used epoxy resins: rigid epoxy, semi-flexible epoxy, and rubber-toughened adhesive epoxy. Changes in the fiber / matrix interface have been caused by changes in pressure vessel test temperature. Due to the high degree of fiber / matrix coupling, a decrease in the tensile properties of the fiber in the pressure vessel is caused, which amounts to 51-77% of the nominal tensile strength of the Kevlar-49 dipped tape. This paper also presents a mechanism to explain these phenomena.