Determination of the Interlaminar Fracture Toughness of Glass-Fiber-Reinforced Plastics on Ring Segments

被引：0
作者：
V. I. Solodilov
S. L. Bazhenov
Yu. A. Gorbatkina
A. M. Kuperman
机构：
[1] Semenov Institute of Chemical Physics,
[2] Russian Academy of Sciences,undefined
[3] Enikolopov Institute of Synthetic Polymer Materials,undefined
[4] Russian Academy of Sciences,undefined
来源：
Mechanics of Composite Materials | 2003年 / 39卷
关键词：
fracture toughness; ring segment; double-cantilever beam; glass-fiber-reinforced plastic;
D O I：
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中图分类号：
学科分类号：
摘要：
A method is developed which allows one to estimate the fracture toughness GIc of fiber-reinforced plastics using ring segment specimens. It is shown that this method reduces to the so-called “angle method.” The approach developed was tested on segments of glass-fiber-reinforced plastic (GFRP) rings based on an EDT-10 epoxy matrix and RVMPN 10-1200-14 glass fibers. The crack was set by a polyimide film placed in the specimen midlayer at the winding stage. The ring thickness was 1 to 4.5 mm. The fracture toughness GIc was also calculated from force F-displacement D diagrams. It was found that the values of GIc determined by both methods agreed well. For δ ≥2 mm thick segments with long (L ≥30 mm) cracks, GIc was practically independent of L and δ, and, for the GFRP examined, it could be regarded as a material constant.
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页码：407 / 414
页数：7
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