FRACTURE-BEHAVIOR OF COATED UNCOATED GRAPHITE-EPOXY COMPOSITES

被引:8
作者
JOSEPH, R
BELL, JP
RHEE, H
机构
[1] Univ of Connecticut, Storrs, CT, USA, Univ of Connecticut, Storrs, CT, USA
关键词
MATERIALS TESTING - Fracture;
D O I
10.1002/pen.760280909
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
The static delamination behavior of graphite/epoxy composite specimens subjected to mode I tensile opening (using UDCB specimens) and pure mode II shear loading (using ENF specimens) was studied. The graphite epoxy composites for the study were made from commercially treated fibers, with and without an electropolymerized interlayer. The mode I fracture energy (G//I//C) was found to be significantly higher (more than 50 percent) for the coated fibers. However, this improvement was accompanied by a high reduction (more than 3 times) in the mode II fracture energy (G//I//I//C). This effect is apparently related to poor adhesion between the interlayer and the epoxy resin, which may be corrected by use of a 'top layer' of appropriate composition to form chemical bonds between the phases. The fracture toughness (K//I//C) of composites made with commercially treated fibers was also evaluated, using double side-notched specimens.
引用
收藏
页码:605 / 609
页数:5
相关论文
共 13 条
[1]  
BELL JP, 1987, J COMPOS MATER, V8, P46
[2]   FRACTURE-TOUGHNESS OF GRAPHITE-EPOXY LAMINATES [J].
CAPRINO, G ;
HALPIN, JC ;
NICOLAIS, L .
COMPOSITES, 1980, 11 (02) :105-107
[3]   FRACTURE-MECHANICS IN COMPOSITE-MATERIALS [J].
CAPRINO, G ;
HALPIN, JC ;
NICOLAIS, L .
COMPOSITES, 1979, 10 (04) :223-227
[4]  
CROSSMAN FW, 1980, J COMPOS MATER, V14, P88, DOI DOI 10.1177/002199838001400107
[5]  
DECHARENTENAY FX, 1980, 3RD P INT C COMP MAT
[6]  
KINLOCH AJ, 1983, FRACTURE BEHAVIOUR P
[7]  
RUSSELL AJ, 1985, MAR NASA ASTM S TOUG
[8]  
RUSSELL AJ, 1982, 4TH P INT C COMP MAT, V1, P279
[9]  
STRAWLEY JE, 1969, FRACTURE, P45
[10]   MACROSCOPIC FRACTURE MECHANICS OF ADVANCED COMPOSITE MATERIALS [J].
WADDOUPS, ME ;
EISENMAN.JR ;
KAMINSKI, BE .
JOURNAL OF COMPOSITE MATERIALS, 1971, 5 (NOCT) :446-&