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Strain hardening equation and the prediction of tensile strength of rolled polymers
Author(s) -
Bahadur S.
Publication year - 1973
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760130405
Subject(s) - materials science , strain hardening exponent , composite material , ultimate tensile strength , hardening (computing) , viscoelasticity , thermoplastic , uniaxial tension , stress–strain curve , tension (geology) , polymer , work hardening , deformation (meteorology) , microstructure , layer (electronics)
A number of thermoplastic polymers were tested in tension to investigate their strain hardening behavior. A strain hardening equation has been proposed in terms of the true stress, true strain and two constants σ o and m . The three material constants, viz. σ o m and the true fracture strain, are shown to be adequate to describe completely the material's nonlinear viscoelastic or the so‐called “plastic” behavior. The true stress‐strain data for the polymers rolled to varying amounts of cold‐work fits the strain hardening plot of the unrolled material. The same strain hardening equation, therefore, applies to rolled materials as well. The procedure for predicting the tensile strength of rolled materials is given.