Double necking in polymer tensile deformation |
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| Authors: | Erwin Pink Andreas Kronthaler Petra Valtingoier |
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| Affiliation: | (1) Erich-Schmid-Institut für Festkörperphysik der Österreichischen Akademie der Wissenschaften, Leoben, Austria;(2) Present address: RADEX Austria A.G., Vienna, Austria |
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| Abstract: | After initial necking of tensile polymer samples the deformation front moves along the gauge length at a stress which is smaller than the yield stress. The still  undeformed parts of the sample are therefore subjected to conditions which favour deformation by a creep mechanism. If the extension rate is right, secondary necking becomes possible. Boundary conditions are discussed. |
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