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Characterization and modeling of strain rate hardening in natural‐fiber‐reinforced viscoplastic polymer
Author(s) -
Fotouh Ahmed,
Wolodko John D.,
Lipsett Michael G.
Publication year - 2014
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.22894
Subject(s) - materials science , composite material , viscoplasticity , volume fraction , strain hardening exponent , strain rate , natural fiber , hardening (computing) , fiber , polyethylene , polymer , moisture , constitutive equation , finite element method , structural engineering , layer (electronics) , engineering
The effect of strain rate ( ɛ · ) on the mechanical properties of short‐hemp‐fiber‐reinforced High Density Polyethylene is characterized and modeled at different values ofɛ ·and hemp fiber volume fraction (v f ) under dry and wet conditions. Based on the experiments, a generalized comprehensive power law model is developed to predict the behavior of the mechanical properties as functions of v f ,ɛ · , and moisture absorption. It is demonstrated that the developed model successes to accurately simulate the effects of v f ,ɛ · , and moisture absorption on the mechanical properties of the natural‐fiber‐reinforced composites as well as the unreinforced polymer. POLYM. COMPOS., 35:2290–2296, 2014. © 2014 Society of Plastics Engineers