Specification of non-uniform residual stresses and tensile characteristic in laminated composite materials exposed to simulated space environment

Authorsعلی طباطبائیان,احمدرضا قاسمی,بهزاد اصغری
JournalPOLYM TEST
Page number1
Volume number80
IF3.275
Paper TypeFull Paper
Published At2019-10-09
Journal GradeScientific - research
Journal TypeElectronic
Journal CountryIran, Islamic Republic Of
Journal IndexSCOPUS ,JCR

Abstract

In this study, the impact of the low earth orbit environment on multi-layered glass fiber reinforced polymer (GFRP) composites is analyzed in detail. The material responses are characterized through an assessment of residual stresses and mechanical property changes. To follow this aim, a thermal cycling condition was provided and composite samples were exposed to cyclic temperature variations with different number of thermal cycles. Then, the slitting method as an accurate semi-destructive technique was accomplished to characterize the nonuniform residual stresses through the depth of GFRP laminates. Additionally, tensile strength and mechanical properties were examined conducting tensile test. The results signified that residual stresses are reduced as the composites undergo temperature fluctuations. Finally, based on experimental results, a quadratic equation was proposed to predict the tensile strength of GFRPs exposed to thermal cycling condition. The proposed model was successfully verified and proved to be accurate with the error of less than 5%.

tags: Residual stressMechanical propertiesThermal cyclingGlass fiber reinforced polymer (GFRP)Experimental evaluationAnalytical model