Microstructure transformation and stress-strain behavior of isotactic polypropylene under large plastic deformation.(French Research on Structural ... article from: Polymer Engineering and Science
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Book Details
Publisher
Society of Plastics Engineers, Inc.
ISBN / ASIN
B00097TKMS
ISBN-13
978B00097TKM8
Marketplace
France 🇫🇷
Description
This digital document is an article from Polymer Engineering and Science, published by Society of Plastics Engineers, Inc. on October 1, 1997. The length of the article is 5025 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.
From the author: The macroscopic stress-strain behavior of monoclinic polypropylene samples was investigated at 70 [degrees] C under uniaxial tension and simple shear by means of a special videometric testing system that gives access to the constitutive equation of plastic behavior at constant strain rate up to large deformation. At several levels of plastic strain, the microstructural evolution of the material was characterized by means of X-ray scattering, densitometry and viscoelastic analysis. It appears that the strain hardening is high in tension, whereas it is nearly zero in shear. This behavior is associated with the development of a fiber texture in tension, which differs drastically from the planar crystalline texture developed in shear. Furthermore, it is shown that structural damage takes place as the plastic deformation proceeds in tension, while only little damage is recorded in shear. A viscoplastic model has been developed that specifically takes into account the various slip systems activated in the polypropylene crystallites and the elastic interactions of the lamellae through a self-consistent scheme. Simulations based on this model reproduce correctly the contrasting strain-hardening in tension and in shear and the different crystalline textures induced for these two loading paths.
Citation Details
Title: Microstructure transformation and stress-strain behavior of isotactic polypropylene under large plastic deformation.(French Research on Structural Properties of Polymers)
Author: C. G'sell
Publication:Polymer Engineering and Science (Refereed)
Date: October 1, 1997
Publisher: Society of Plastics Engineers, Inc.
Volume: v37 Issue: n10 Page: p1702(10)
Distributed by Thomson Gale
From the author: The macroscopic stress-strain behavior of monoclinic polypropylene samples was investigated at 70 [degrees] C under uniaxial tension and simple shear by means of a special videometric testing system that gives access to the constitutive equation of plastic behavior at constant strain rate up to large deformation. At several levels of plastic strain, the microstructural evolution of the material was characterized by means of X-ray scattering, densitometry and viscoelastic analysis. It appears that the strain hardening is high in tension, whereas it is nearly zero in shear. This behavior is associated with the development of a fiber texture in tension, which differs drastically from the planar crystalline texture developed in shear. Furthermore, it is shown that structural damage takes place as the plastic deformation proceeds in tension, while only little damage is recorded in shear. A viscoplastic model has been developed that specifically takes into account the various slip systems activated in the polypropylene crystallites and the elastic interactions of the lamellae through a self-consistent scheme. Simulations based on this model reproduce correctly the contrasting strain-hardening in tension and in shear and the different crystalline textures induced for these two loading paths.
Citation Details
Title: Microstructure transformation and stress-strain behavior of isotactic polypropylene under large plastic deformation.(French Research on Structural Properties of Polymers)
Author: C. G'sell
Publication:Polymer Engineering and Science (Refereed)
Date: October 1, 1997
Publisher: Society of Plastics Engineers, Inc.
Volume: v37 Issue: n10 Page: p1702(10)
Distributed by Thomson Gale
