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Two‐dimensional mapping of tensile strength for injection molded composites of glass fiber reinforced polypropylene
Author(s) -
Karian Harutun G.,
Stoops Ken
Publication year - 1998
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.10072
Subject(s) - materials science , composite material , ultimate tensile strength , polypropylene , glass fiber , fiber , anisotropy , coupling (piping) , tensile testing , optics , physics
An array of polypropylene composites were injection molded into rectangular plaques having a single side gate. As a consequence of non‐symmetrical flow patterns, giving complex distribution of fiber orientations, measured tensile strength of test specimens cut along X‐Y directions produced nonlinear and anisotropic trendlines. Chemical coupling, glass fiber content, and the choice of short or long glass fiber reinforcement are shown to be material variables influencing the magnitude of the tensile strength at any given localized position. These data verify the notion that tensile strength evaluation along just the flow direction is insufficient for anticipating end use performance.