PREVENTING FATAL FRACTURES IN CARBON-FIBER-GLASS-FIBER-REINFORCED PLASTIC COMPOSITES BY MONITORING CHANGE IN ELECTRICAL-RESISTANCE

被引:80
作者
MUTO, N
YANAGIDA, H
NAKATSUJI, T
SUGITA, M
OHTSUKA, Y
机构
[1] UNIV TOKYO,CTR ENVIRONM SCI,TOKYO 113,JAPAN
[2] UNIV TOKYO,FAC ENGN,TOKYO 113,JAPAN
[3] SHIMIZU CORP,TOKYO,JAPAN
关键词
D O I
10.1111/j.1151-2916.1993.tb05309.x
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
A method which monitors the changes in electrical resistance in CFGFRP (carbon-fiber-glass-fiber-reinforced plastics) composites was found to be a promising technique for foreseeing fractures and preventing fatal ones. CFGFRP composites containing two types of carbon fibers along with 31.6 vol% glass fibers were used. U-shaped copper electrodes were attached to both ends of the CFGFRP composites, using a conductive adhesive agent, and electrical resistance was measured via a two-thermal dc method. A strain gauge was attached onto a specimen to measure strain. On loading, the changes in electrical resistance increased linearly with increasing strain, and the value reached 38% for the CFGFRP composites containing 0.36 vol% PAN-based high-strength carbon fibers. A tremendous change in electrical resistance was seen for the CFGFRP composites containing 0.38 vol% pitch-based high-property carbon fibers, and the composites could maintain their shape owing to a hybrid effect after the carbon fibers fractured. The change in electrical resistance can be controlled through suitable selection of the type of carbon fibers according to their values of ultimate elongation. Permanent, residual electrical resistance was found to remain, and the changes in resistance were dependent on the maximum previous strain.
引用
收藏
页码:875 / 879
页数:5
相关论文
共 8 条
[1]  
CORNER PC, 1969, NATURE, V223, P1146
[2]   NON-HOOKEAN BEHAVIOUR OF STRONG CARBON FIBRES [J].
CURTIS, GJ ;
MILNE, JM ;
REYNOLDS, WN .
NATURE, 1968, 220 (5171) :1024-&
[3]  
Hayashi T, 1972, COMPOS MATH, V1, P18
[4]   THE STRENGTH OF HYBRID GLASS-CARBON FIBER COMPOSITES .1. FAILURE STRAIN ENHANCEMENT AND FAILURE MODE [J].
MANDERS, PW ;
BADER, MG .
JOURNAL OF MATERIALS SCIENCE, 1981, 16 (08) :2233-2245
[5]  
MUTO N, 1992, J CERAM SOC JPN, V100, P115
[6]  
MUTO N, 1992, J JPN SOC COMPOS MAT, V18, P144
[7]   ELECTRICAL PROPERTIES OF SINGLE CARBON FIBRES [J].
OWSTON, CN .
JOURNAL OF PHYSICS D-APPLIED PHYSICS, 1970, 3 (11) :1615-&
[8]  
SHULTE K, 1989, COMPOS SCI TECHNOL, V36, P63