Universal Journal of Mechanical Engineering Vol. 3(6), pp. 252 - 261
DOI: 10.13189/ujme.2015.030605
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New Methodology for Prestressing Fiber Composites

Abdul Kareem F. Hassan 1,*, Osama A. Abdullah 2
1 Department of Mechanical Engineering, College of Engineering, Basra University, Iraq
2 Marine College, Arabian Gulf Academy for Maritime Studies, Iraq


The development of composite materials is characterized by the improvement of their mechanical properties (stiffness and strength) which have widened their application for structural fields like automobile, aerospace, and naval industries. The mechanical properties of composite materials can be upgraded during the manufacturing process by applying an appropriate load on the fibers and curing the corresponding matrix at certain temperature. For that purpose a machine was designed and built to exert load and heat on a composite of carbon fiber mat or glass fiber mat and matrix. The result is a rig agreed with horizontal tensiometer that can be called a prestress machine. This machine holds a certain tension on the fibers while the matrix is being cured. The main parts of the prestress machine are the mold, pulling crosshead, oven and sensors. This paper presents the steps of constructing and using this machine. Experimental investigations were carried out to determine the complete set of stiffness characteristics Eij, Gij, vij and strength characteristics σi,n, εi,n. The outcome results show that this machine can produce prestressed composite materials with much better mechanical properties comparing to those properties of the non-prestressed composite materials.

Prestress, Composite Material, Mechanical Properties, Electric Jack

Cite This Paper in IEEE or APA Citation Styles
(a). IEEE Format:
[1] Abdul Kareem F. Hassan , Osama A. Abdullah , "New Methodology for Prestressing Fiber Composites," Universal Journal of Mechanical Engineering, Vol. 3, No. 6, pp. 252 - 261, 2015. DOI: 10.13189/ujme.2015.030605.

(b). APA Format:
Abdul Kareem F. Hassan , Osama A. Abdullah (2015). New Methodology for Prestressing Fiber Composites. Universal Journal of Mechanical Engineering, 3(6), 252 - 261. DOI: 10.13189/ujme.2015.030605.