Apparent fracture in polymeric fluids under step shear
Agimelen, Okpeafoh Stephen and Olmsted, Peter D (2013) Apparent fracture in polymeric fluids under step shear. Physical Review Letters, 110. 204503. ISSN 1079-7114 (https://doi.org/10.1103/PhysRevLett.110.204503)
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Abstract
Recent step strain experiments in well-entangled polymeric liquids demonstrated a bulk fracturelike phenomenon.We study this instability by using a modern version of the Doi-Edwards theory for entangled polymers, and we find close quantitative agreement with the experiments. The phenomenon occurs because the viscoelastic liquid is sheared into a rubbery state that possesses an elastic constitutive instability [G. Marrucci and N. Grizzuti, J. Rheol. 27, 433 (1983)]. The fracture is a transient manifestation of this instability, which relies on the amplification of spatially inhomogeneous fluctuations. This mechanism differs from the fracture in glassy materials and dense suspensions.
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Item type: Article ID code: 47475 Dates: DateEvent17 May 2013PublishedSubjects: Technology > Chemical engineering Department: Faculty of Engineering > Chemical and Process Engineering Depositing user: Pure Administrator Date deposited: 14 Apr 2014 22:22 Last modified: 29 Mar 2024 03:56 URI: https://strathprints.strath.ac.uk/id/eprint/47475