摘要
环氧树脂是纤维增强塑料(FRP) 的主要基体材料,它在FRP中处于复杂应力状态。本文的研究内容:1.建立环氧树脂浇注体在平面应力状态下线性受力阶段的应力应变关系式。2.对环氧树脂浇注体薄壁园管试件,在平面应力状态下的六种主应力比(1:0;1:O.5;1:0.96;1:-1;1-0.38;1:-O.155)分别进行了复合应力试验。从这六个试验的共同破坏原因分析,得出了这类材料在平面应力状态下,当其二个主应力均为拉应力,或一个为拉应力,另一个为不大于拉应力值的压应力时,可以应用最大拉应力强度理论。
Epoxy is the main matrix material for fiber-roinforced plastics(FRP) and is always in complicated stress state in FRP.The content of this pap:-r may be summariz d as follows:a) The relationship between stress and strain for epoxy cast has been established when it is in plane stress state and during linear elastic stage.b)Triaxial material tests have been made on epoxy cast thin-walled cylinderical samples when they are in plane stress state where there are six principal stress ratios (1=0, 1=0.5, 1:0.96, 1: -1, 1: 0.38, 1:-0.155) .c) Analyzing theccommon reasons of the failure in the six types of tests, it may come to the conclusion that the maximum tensile stress theory can be applied to epoxy cast when its two principal stresses arc both positive ,or when one is positive while the other is negative whose absolute value is less than that of the positive one.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
1990年第1期51-58,共8页
Acta Materiae Compositae Sinica
