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Paper Information

Journal:   MECHANICAL ENGINEERING SHARIF (SHARIF: MECHANICAL ENGINEERING)   FALL 2015 , Volume 31-3 , Number 2; Page(s) 89 To 95.
 
Paper: 

REDUCTION IN DEFORMATION OF UNSYMMETRICAL CROSS-PLY LAMINATED COMPOSITE USING CARBON NANOFIBERS

 
 
Author(s):  SHOKRIEH M.M.*, DANESHVAR A.
 
* DEPT. OF MECHANICAL ENGINEERING IRAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
 
Abstract: 

Due to the natural inconsistency of the mechanical and thermal properties of fiber and matrix, residual stresses are introduced during the curing process of brous polymer composites. Considering a high Young’s modulus and the negative coefficient of thermal expansion (CTE) of carbon nanofibers (CNFs), the addition of CNFs into the matrix makes its properties closer to reinforcement, and this reduces residual stress in laminated polymer composites. In this research, a novel method to decrease the deformed shape of cross ply un-symmetric laminated composites, by adding vapour grown carbon nano fiber, is proposed. To this end, rst, using thermo mechanical analysis (TMA) and tensile test methods, the coefficient of thermal expansion and the Young’s modulus of vapour grown carbon nano ber reinforced epoxy are measured. The characterizations showed a signi cant decrease in the coefficient of thermal expansion and a slight increase in the Young’s modulus of the matrix. Then, using the sonication technique, as well as the hand layup method, vapour grown carbon nano fiber/carbon fiber/epoxy cross ply laminated composites are fabricated in dierent vapour grown carbon nano fiber weight loadings, and the percentages of deformations are measured carefully. The results show that adding 1 wt of vapour grown carbon nano fiber to the composites can reduce the out of plane deformation of un-symmetric laminates up to 48%. Finally, the finite element method and the classical lamination theory (CLT) are used to validate the experimental observations. The results of this comparison show good agreement between the modeling and the experimental results. The results indicate that the addition of low contents of CNF causes the coefficient of thermal expansion of the matrix to decrease and the matrix Young’s modulus to increase, which, in turn, leads to a considerable reduction in micro and macro thermal residual stresses. This reduction will decrease the unwanted deformed shape of the cross ply un-symmetric laminated composites.

 
Keyword(s): UN-SYMMETRIC CROSS PLY POLYMERIC COMPOSITES, CARBON NANO FIBER COECIENT OF THERMAL EXPANSION, YOUNG’S MODULUS
 
 
References: 
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Citations: 
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APA: Copy

SHOKRIEH, M., & DANESHVAR, A. (2015). REDUCTION IN DEFORMATION OF UNSYMMETRICAL CROSS-PLY LAMINATED COMPOSITE USING CARBON NANOFIBERS. MECHANICAL ENGINEERING SHARIF (SHARIF: MECHANICAL ENGINEERING), 31-3(2), 89-95. https://www.sid.ir/en/journal/ViewPaper.aspx?id=509163



Vancouver: Copy

SHOKRIEH M.M., DANESHVAR A.. REDUCTION IN DEFORMATION OF UNSYMMETRICAL CROSS-PLY LAMINATED COMPOSITE USING CARBON NANOFIBERS. MECHANICAL ENGINEERING SHARIF (SHARIF: MECHANICAL ENGINEERING). 2015 [cited 2021July24];31-3(2):89-95. Available from: https://www.sid.ir/en/journal/ViewPaper.aspx?id=509163



IEEE: Copy

SHOKRIEH, M., DANESHVAR, A., 2015. REDUCTION IN DEFORMATION OF UNSYMMETRICAL CROSS-PLY LAMINATED COMPOSITE USING CARBON NANOFIBERS. MECHANICAL ENGINEERING SHARIF (SHARIF: MECHANICAL ENGINEERING), [online] 31-3(2), pp.89-95. Available: https://www.sid.ir/en/journal/ViewPaper.aspx?id=509163.



 
 
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