Publication

Polymer Viscoelasticity in Shear

2010
Student Projects

Abstract

Polymer materials may exhibit significant viscoelastic behaviour under various type of deformations. A model that can describe various viscous behaviours in simple tension was proposed in a previous work of the laboratory of biomechanical orthopedics. This model is interesting as it introduces descriptive material parameters that help in contrasting different viscous behaviours. The objective of this study is to assess if the model is also valid in simple shear. A device to perform simple shear was designed and tests performed on polyoxymethylene (POM), polyethylene terephthalate (PETP) and polycarbonate (PC).

Official source

https://infoscience.epfl.ch/entities/publication/51e08e34-2f8d-4507-b6d1-6a11a053d6bf

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2010
Student Projects

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/51e08e34-2f8d-4507-b6d1-6a11a053d6bf

About this result

Related concepts (32)

Polymer

A polymer (ˈpɒlᵻmər; Greek poly-, "many" + -mer, "part") is a substance or material consisting of very large molecules called macromolecules, composed of many repeating subunits. Due to their broad spectrum of properties, both synthetic and natural polymers play essential and ubiquitous roles in everyday life. Polymers range from familiar synthetic plastics such as polystyrene to natural biopolymers such as DNA and proteins that are fundamental to biological structure and function.

Rheology

Rheology (riːˈɒlədʒi; ) is the study of the flow of matter, primarily in a fluid (liquid or gas) state, but also as "soft solids" or solids under conditions in which they respond with plastic flow rather than deforming elastically in response to an applied force. Rheology is a branch of physics, and it is the science that deals with the deformation and flow of materials, both solids and liquids. The term rheology was coined by Eugene C. Bingham, a professor at Lafayette College, in 1920, from a suggestion by a colleague, Markus Reiner.

Viscoelasticity

In materials science and continuum mechanics, viscoelasticity is the property of materials that exhibit both viscous and elastic characteristics when undergoing deformation. Viscous materials, like water, resist shear flow and strain linearly with time when a stress is applied. Elastic materials strain when stretched and immediately return to their original state once the stress is removed. Viscoelastic materials have elements of both of these properties and, as such, exhibit time-dependent strain.

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Polymer Viscoelasticity in Shear

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