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Random glass mat reinforced thermoplastic composities. Part VII: A statistical approach to strength
Author(s) -
Bushko Wit C.,
Stokes Vijay K.
Publication year - 1994
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.750150506
Subject(s) - materials science , ultimate tensile strength , weibull distribution , composite material , brittleness , stiffness , weibull modulus , young's modulus , elastic modulus , flexural strength , mathematics , statistics
Large macroscopic‐scale variations in the tensile moduli and tensile strengths are charcteristic of random glass mat composites (GMT). The large‐scale, point‐to‐point variations in the local stiffness is characterized by a probability density function that can be used to predict the stiffness of parts only in a statistical sense. Weibull statistics widely used for modeling the scatter in the strength of brittle materials cannot be applied to the large variations in the strength of GMTs: The macroscopic stress field in brittle materials is assumed to be deterministic, while the stress field in GMTs varies randomly on a macroscopic scale. A statistical approach for characterizing the strength of GMTs is developed by combining an empirically established strength‐modulus correlation with the statistical characterization of the tensile modulus.