Journal ArticleDOI
Energy storage during inelastic deformation of glassy polymers
O. A. Hasan,Mary C. Boyce +1 more
TLDR
In this article, the microstructural state of glassy polymers that evolve during physical ageing and inelastic deformation was studied, showing that ageing is accompanied by enthalpy relaxation.About:
This article is published in Polymer.The article was published on 1993-12-01. It has received 196 citations till now. The article focuses on the topics: Strain hardening exponent & Flow stress.read more
Citations
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Effects of confinement on material behaviour at the nanometre size scale
TL;DR: In this article, the effects of size and confinement at the nanometre size scale on both the melting temperature and the glass transition temperature, Tm, are reviewed, and it seems that the existing theories of Tg are unable to explain the range of behaviours seen at the nano-scale.
Journal ArticleDOI
Evolution of plastic anisotropy in amorphous polymers during finite straining
Ellen M. Arruda,Mary C. Boyce +1 more
TL;DR: In this article, a tensorial internal state variable model of the evolving anisotropic polymer response was developed to predict the response of polycarbonate and polymethylmethacrylate over a range of strain rates and temperatures.
Journal ArticleDOI
Dynamic relaxations and relaxation-property relationships in metallic glasses
Weihua Wang,Weihua Wang +1 more
TL;DR: A review of the state of the art of dynamic relaxation in metallic glassy system, as well as a comparison with other glassy systems, is presented in this paper, where the correlation between dynamic relaxation and various properties of MGs are established and summarized.
Journal ArticleDOI
Thermomechanical processing of metallic glasses: extending the range of the glassy state
TL;DR: In this paper, the extent of relaxation and rejuvenation induced by thermomechanical processing (that is, elastic and plastic deformation, including cold and hot working, and cyclic loading) is explored.
Journal ArticleDOI
The Influence of Intrinsic Strain Softening on Strain Localization in Polycarbonate: Modeling and Experimental Validation
TL;DR: In this paper, the effect of mechanical conditioning by cyclic torsion on the subsequent deformation of polycarbonate polymers is investigated. But the model is purely single mode' (i.e., only one relaxation time is involved), and therefore it is not able to capture the nonlinear viscoelastic pre-yield behavior accurately.
References
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Journal ArticleDOI
Large inelastic deformation of glassy polymers. part I: rate dependent constitutive model
TL;DR: In this paper, a three-dimensional constitutive model based on the macromolecular structure of glassy polymeric products and the micromechanism of plastic flow is presented. But the model is not suitable for the case of glass polymers.
Journal ArticleDOI
A theory for the low-temperature plastic deformation of glassy polymers
TL;DR: In this paper, a theory of yielding of glassy polymers by thermally activated production of local molecular kinks is described, and the authors obtain the activation free enthalpy of this process by modeling the intermolecular energy barrier as resulting from the stress fields of two equal and opposite closely spaced wedge disclination loops extending over the molecular cross section at the points of rotation of the molecular kink.
Journal ArticleDOI
An experimental and anaiytical investigation of the large strain compressive and tensile response of glassy polymers
Mary C. Boyce,Ellen M. Arruda +1 more
TL;DR: In this article, the plastic flow of polycarbonate (PC) was examined by obtaining true stress-strain data over a range of strain rates at room temperature through homogeneous, uniaxial, constant strain rate compression testing to strains as high as 125 percent.
Journal ArticleDOI
An investigation of the yield and postyield behavior and corresponding structure of poly(methyl methacrylate)
TL;DR: In this article, the effects of physical aging on the yield and postyield behavior and corresponding evolution in the structural state of glassy polymers are investigated, and a systemetic program of uniaxial, isothermal, constant strain-rate rests on poly(methyl methacrylate) specimens of different thermal histories was carried out and positron annihilation lifetime measurements were performed.
Journal ArticleDOI
Effects of annealing and prior history on enthalpy relaxation in glassy polymers. 1. Experimental study on poly(vinyl chloride)
Alan R. Berens,Ian M. Hodge +1 more
TL;DR: In this article, the authors used differential scanning calorimetry (DSC) to detect enthalpy relaxations in glassy polymers aged after a wide variety of thermal, mechanical, and solvent or vapor treatments.
Related Papers (5)
A constitutive model for the nonlinear viscoelastic viscoplastic behavior of glassy polymers
O. A. Hasan,Mary C. Boyce +1 more
Evolution of plastic anisotropy in amorphous polymers during finite straining
Ellen M. Arruda,Mary C. Boyce +1 more