A platform for research: civil engineering, architecture and urbanism
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Abstract From a very general point of view, when a sample is submitted to an external force, it undergoes a deformation. That deformation is termed reversible if it disappears when the force is removed. When reversibility is total and instantaneous, the deformation is elastic. Actually, at low value of strain, the behaviour of a polymer is viscoelastic. The recovery process is then partly delayed with time: this component of the deformation is called anelasticity. Beyond a certain limit, a part of the deformation becomes irreversible. This permanent deformation is called plastic. In metals, the threshold, also called the plastic limit, is quite easy to determine. However, in polymers, the plastic limit is more difficult to estimate due to a polymers viscoelastic nature and the existence of anelasticity (see Viscoelasticity). Conventionally, the different components of strain are illustrated via a creep test (see Figure 1 and Creep).
Abstract From a very general point of view, when a sample is submitted to an external force, it undergoes a deformation. That deformation is termed reversible if it disappears when the force is removed. When reversibility is total and instantaneous, the deformation is elastic. Actually, at low value of strain, the behaviour of a polymer is viscoelastic. The recovery process is then partly delayed with time: this component of the deformation is called anelasticity. Beyond a certain limit, a part of the deformation becomes irreversible. This permanent deformation is called plastic. In metals, the threshold, also called the plastic limit, is quite easy to determine. However, in polymers, the plastic limit is more difficult to estimate due to a polymers viscoelastic nature and the existence of anelasticity (see Viscoelasticity). Conventionally, the different components of strain are illustrated via a creep test (see Figure 1 and Creep).
Recovery of Glassy Polymers
Gauthier, C. (author)
1999-01-01
4 pages
Article/Chapter (Book)
Electronic Resource
English
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