Stiffness prediction of short fiber reinforced composites

Autor: Zheng-Ming Huang, Chun-Chun Zhang, Yuan-De Xue
Rok vydání: 2019
Předmět:
Zdroj: International Journal of Mechanical Sciences. :105068
ISSN: 0020-7403
DOI: 10.1016/j.ijmecsci.2019.105068
Popis: Stress fields in the fiber and matrix of a transversely isotropic short fiber reinforced composite are obtained following an elasticity approach, and its axial modulus is derived. Extension of the bridging tensor in Bridging Model to the short fiber composite is made and analytical formulae for all of the four other moduli are determined. They are then used to predict the elastic modulus of a randomly arranged short fiber reinforced composite with any fiber aspect ratio and any fiber volume fraction. By assuming that every fiber in a representative volume element of the composite has an equal possibility of orientation with respect to each global coordinate, the present model's predictions agree better with the available experiments than those obtained from Halpin–Tsai's formulae and finite element method. An iso-strain assemblage attains a higher accuracy than an iso-stress approach in general except for a case of very small fiber aspect ratio, in which both iso-strain and iso-stress methods result in favorable predictions. The present work completes the short board of Bridging Model for analyzing mechanical properties of short fiber or particle reinforced composites.
Databáze: OpenAIRE
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