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Influence of components and interface conditions on mechanical properties of composites and blends
Author(s) -
Pegoraro M.,
Di Landro L.
Publication year - 1993
Publication title -
makromolekulare chemie. macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 0258-0322
DOI - 10.1002/masy.19930700122
Subject(s) - composite material , materials science , composite number , ultimate tensile strength , polyetherimide , viscoelasticity , residual stress , filler (materials) , thermoplastic composites , matrix (chemical analysis) , adhesion , thermal , polymer , physics , meteorology
Filler‐matrix adhesion, particularly in case of thermoplastic matrices, is influenced by the presence of residual stresses due to the cooling of the material from the processing temperature to the final temperature (usually room temperature). A model for the evaluation of thermal stresses in fibre composites at the fibre level is presented which, starting from relationships valid in case of purely elastic components, extends the analysis to account for the matrix viscoelasticity. A Master Curve is needed for this purpose. Thermal stresses around a single fibre are thus evaluated as a function of the final temperature and of the cooling rate of the composite. Fibre matrix adhesion at different temperatures was measured by the single fibre composite method applied to polyetherimide matrix/carbon fibre composites and the results are related to the calculated residual stresses. The relationship between filler‐matrix adhesion efficiency and mechanical (tensile and impact) strength of spherical particle filled composites is also discussed.