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Structure-Property Relationships — Large Strain
Abstract Mechanical Properties of glasses and rubbers are discussed in terms of moduli. Moduli are the proportionality constants between stress and strain, and represent the initial slope of the curves in Figure 1 which illustrate typical modes of polymer failure. Large strain is a relative term depending on the polymer and the temperature. For the purposes of this discussion, large strain refers to any strain outside the linear elastic regime that is approaching the failure point of the specimen. These moduli are relatively constant at low strains, but change at high strains because the conformation of the polymer changes at high strain. Exactly how the moduli changes at high strain is difficult to estimate because it is very sensitive to the thermal and mechanical history of the polymer as well as the time dependence of the applied stress. However, the point at which the polymer fails is of great importance because it determines the limits of the applied stress for this polymer.
Structure-Property Relationships — Large Strain
Abstract Mechanical Properties of glasses and rubbers are discussed in terms of moduli. Moduli are the proportionality constants between stress and strain, and represent the initial slope of the curves in Figure 1 which illustrate typical modes of polymer failure. Large strain is a relative term depending on the polymer and the temperature. For the purposes of this discussion, large strain refers to any strain outside the linear elastic regime that is approaching the failure point of the specimen. These moduli are relatively constant at low strains, but change at high strains because the conformation of the polymer changes at high strain. Exactly how the moduli changes at high strain is difficult to estimate because it is very sensitive to the thermal and mechanical history of the polymer as well as the time dependence of the applied stress. However, the point at which the polymer fails is of great importance because it determines the limits of the applied stress for this polymer.
Structure-Property Relationships — Large Strain
Ludovice, P. J. (author)
1999-01-01
5 pages
Article/Chapter (Book)
Electronic Resource
English
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