Abstract
When a glassy polymer starts to deform plastically under an applied stress it is said to have yielded. Yield leads to a change in the shape of the specimen as a whole. Other processes such as crazing and voiding (strain whitening) may also take place when a polymer is deformed but these involve only local deformations and are not a necessary part of the general yield process. They are often the prelude to fracture and as such they form part of the subject matter of Chapter 7 and to a lesser extent of Chapter 6. Here we shall deal solely with the process of yield, which is of interest because it is the factor limiting the strength of the polymer if brittle fracture can be suppressed; a polymer must have a high yield stress in order to be strong. Another reason for studying the yield behaviour is that the question as to whether or not brittle fracture occurs depends on the detailed interaction of the bulk yielding and fracture processes. If bulk yielding occurs the polymer is likely to be tough.
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Bowden, P.B. (1973). The Yield Behaviour of Glassy Polymers. In: Haward, R.N. (eds) The Physics of Glassy Polymers. Materials Science Series. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-2355-9_6
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DOI: https://doi.org/10.1007/978-94-010-2355-9_6
Publisher Name: Springer, Dordrecht
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