In Situ Matrix Shear Response Using Torsional Test Data of Fiber Reinforced Unidirectional Polymer Composites  

Oleh:

Waas, Anthony M. ; Yerramalli, Chandra S.

Jenis: Article from Bulletin/Magazine
Dalam koleksi: Journal of Engineering Materials and Technology vol. 124 no. 2 (2002), page 152-159.
Topik: POLYMERS; situ matrix; shear; response; torsional test data; fiber reinforced; unidirectional; polymer composites

Ketersediaan

Perpustakaan Pusat (Semanggi) Nomor Panggil: JJ87.3 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Isi artikel

The in situ shear response of the matrix in polymer matrix composites (PMC) has been studied. Torsion tests were performed on solid cylinders of unidirectional glass fiber reinforced / vinylester and unidirectional carbon fiber reinforced / vinylester composites. The composite specimens were subjected to a uniform rate of twist. From the composite stress - strain curve, a plot of tangent shear modulus vs shear strain was derived. Then, using the Halpin - Tsai equations, the in situ matrix shear modulus was determined. The in situ matrix properties obtained from glass / vinylester and carbon / vinylester composites were found to be different. In addition, the properties of the in situ matrix were found to be a function of fiber volume fraction and the elastic properties of the reinforcing fiber. The behavior of the in situ matrix as a function of the fiber volume fraction was explained by using a three cylinder interphase model. The validity of the interphase model in predicting the composite shear modulus was studied by comparison of results against a conventional 2 cylinder model.

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