1987 年 22 巻 3 号 p. 200-206
Several kinds of mechanical strength of high density GFRP for cryogenic use are studied in order to check the combinations of glass fiber materials and matrix resins. Glass materials such as unidirectional woven cloth, plain woven cloth and roving cloth are selected from the view point of good mechanical characteristics. Resin content are established more less than value of 22 weight percent concerning low thermal contraction and GFRP are constituted in isotropy. It is found that the order of excellence in mechanical strength are unidirectional woven cloth GFRP, plain woven cloth GFRP and roving cloth GFRP at both room and cryogenic temperatures.
The delamination strength of roving cloth GFRP is found to be extremely small.
In order to decrease thermal contraction, the combinations of glass materials and fillers in GFRP are also studied. It is clear that the addition of fillers is effective in decrease the thermal contraction, but the addition of fillers make a deterioration of mechanical strength such as delamination strength, bending strength and tensile strength of GFRP.