Applications of a dilatational yielding model to rubber-toughened polymers

A model for dilatational yielding in rubber-toughened polymers, which was proposed in an earlier paper, is developed further. According to the model, deformation begins with cavitation of the rubber particles, and progresses through the growth of dilatational bands, which are cavitated planar yield...

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Published in:Polymer (Guilford) 1995, Vol.36 (15), p.2895-2902
Main Authors: Lazzeri, A., Bucknall, C.B.
Format: Article
Language:English
Subjects:
Applied sciences
dilatation
Exact sciences and technology
Mechanical properties
Organic polymers
Physicochemistry of polymers
Properties and characterization
rubber toughening
yielding
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description A model for dilatational yielding in rubber-toughened polymers, which was proposed in an earlier paper, is developed further. According to the model, deformation begins with cavitation of the rubber particles, and progresses through the growth of dilatational bands, which are cavitated planar yield zones combining inplane shear with extension normal to the band. The model is used to predict band angles and other characteristics of yielding in toughened plastics, including the conditions under which polymers yield without cavitating. Electron micrograph evidence for the formation of dilatation bands is presented, and the influence of these bands on deformation and fracture behaviour is discussed, using a novel method of presentation based on cavitation diagrams.
doi_str_mv 10.1016/0032-3861(95)94338-T
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subjects Applied sciences
dilatation
Exact sciences and technology
Mechanical properties
Organic polymers
Physicochemistry of polymers
Properties and characterization
rubber toughening
yielding
title Applications of a dilatational yielding model to rubber-toughened polymers
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