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Effect of twisting on tensile failure of impregnated yarns with broken filaments

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Title Effect of twisting on tensile failure of impregnated yarns with broken filaments
 
Creator NAIK, NK
MUDZINGWA, I
SINGH, MN
 
Subject short-fiber yarns
unidirectional composites
constitutive theory
staple yarn
matrix
prediction
strength
distributions
interface
mechanics
yam tensile strength
twisted yarn
wound yarn
lateral pressure
stress concentration
ineffective length
interfacial shear strength
frictional shear strength
interface efficiency
broken filament
 
Description The tensile strength of impregnated strand/unidirectional composite depends on many factors including the strength of the interface. Recent efforts in trying to increase the strength of composites have been directed towards increasing the strength of the interface through fiber surface treatment and better resin systems that give better interfacial shear strength. However, the role of frictional forces and analysis of twisted impregnated yams have largely been ignored. Twisted geometry gives rise to lateral pressure that contributes to the frictional shear stress; therefore, for a twisted yam, interfacial shear strength would be higher than that of a impregnated strand/unidirectional composite. Twisted yams have the obvious disadvantage that their unidirectional strength suffers because of fiber obliquity. This work examines the effect of the lateral pressure on the tensile strength of twisted yams with broken filaments. Studies have been carried out on both the helical wound impregnated yams and helical twisted impregnated yams.
 
Publisher AMER SOC TESTING MATERIALS
 
Date 2011-07-17T07:51:38Z
2011-12-26T12:50:11Z
2011-12-27T05:36:17Z
2011-07-17T07:51:38Z
2011-12-26T12:50:11Z
2011-12-27T05:36:17Z
2001
 
Type Article
 
Identifier JOURNAL OF COMPOSITES TECHNOLOGY & RESEARCH, 23(3), 225-234
0884-6804
http://dspace.library.iitb.ac.in/xmlui/handle/10054/4662
http://hdl.handle.net/10054/4662
 
Language en