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On the importance of the dilatational component of the stress state in the uniaxial yield-like behavior of rate-dependent polymers: C. Bauwens-Crowet revisited

Knauss, W. G. (2012) On the importance of the dilatational component of the stress state in the uniaxial yield-like behavior of rate-dependent polymers: C. Bauwens-Crowet revisited. Mechanics of Time-Dependent Materials, 16 (2). pp. 223-240. ISSN 1385-2000. https://resolver.caltech.edu/CaltechAUTHORS:20120518-095654000

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Abstract

The effect of the dilatational stress component on the yield-like behavior of ratedependent polymers is examined via the example of PMMA. Starting with uniaxial data published in 1973 by C. Bauwens-Crowet and describing the dependence of yield (maximum) stress in compression and in tension, the then offered reduction or “shift” scheme is reviewed, in particular the fact that tension and compression data lead to different data reductions. Following the argument that mechanically induced dilatation can affect the time dependence of polymeric deformation processes much like temperature affects temporal scaling, the same data is then subjected to an analysis based on volumetric changes accompanying mechanical loading. It is found that such a treatment unifies the compression and tension data into a single master curve to the extent that temperature and loads from the two deformation modes are congruous and exhibit no more data scatter than the presentation of the original data reduction. Moreover, the time–temperature shift properties for this newly reduced yield-like behavior then follows also the same rules and properties as do viscoelastic mechanical properties acquired under small deformations.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1007/s11043-011-9149-6DOIUNSPECIFIED
http://www.springerlink.com/content/p466640554355421PublisherUNSPECIFIED
Additional Information:© 2012 Springer Science+Business Media, B.V. Received: 5 May 2011; Accepted: 6 July 2011; Published online: 4 August 2011. The author expresses many thanks to Dr. Roshdy Barsoum of the Office of Naval Research for his guidance and cooperation and for the sustained support of this difficult effort under Grants ONR N000 14-09-1-0552 and ONR N000 14-11-1-0390.
Group:GALCIT
Funders:
Funding AgencyGrant Number
Office of Naval Research (ONR)N000 14-09-1-0552
Office of Naval Research (ONR)N000 14-11-1-0390
Subject Keywords:Nonlinear viscoelasticity; Plasticity-like behavior of rigid polymers; Mechanical and thermal dilation
Issue or Number:2
Record Number:CaltechAUTHORS:20120518-095654000
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20120518-095654000
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:31536
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:18 May 2012 20:59
Last Modified:03 Oct 2019 03:52

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