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Mechanical properties of discontinuous fiber reinforced thermoplastics. II. Random‐in‐plane fiber orientation
Author(s) -
Blumentritt Bruce F.,
Vu Ban T.,
Cooper Stuart L.
Publication year - 1975
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760150606
Subject(s) - materials science , composite material , fiber , orientation (vector space) , plane (geometry) , geometry , mathematics
The mechanical properties are presented for a series of discontinuous fiber‐reinforced thermoplastic composites made with random‐in‐plane fiber orientation. The matrix and fiber materials were chosen to provide a wide range of strength, modulus, ductility and adhesive properties. In many cases strong, rigid, yet tough composites were fabricated. Strength levels of over 20,000 psi and modulus values over 1,000,000 psi were reached in several systems reinforced with short Kevlar‐49 and graphite fibers. A strong dependence of composite strength and modulus on fiber strength and modulus was noted indicating good transfer of load from matrix to reinforcement. Fiber efficiency factors for modulus and strength were calculated for the experimental composite systems and averaged 0.19 and 0.11 respectively. Data were analyzed using basic composite theory. Properties of the experimental composites could not be predicted from constituent properties.