000014184 001__ 14184
000014184 005__ 20161115100144.0
000014184 04107 $$aeng
000014184 046__ $$k2016-08-21
000014184 100__ $$aLavoie, Shawn
000014184 24500 $$aA rate-dependent damage model for elastomers at large strain

000014184 24630 $$n24.$$p24th International Congress of Theoretical and Applied Mechanics - Book of Papers
000014184 260__ $$bInternational Union of Theoretical and Applied Mechanics, 2016
000014184 506__ $$arestricted
000014184 520__ $$2eng$$aThe fracture toughness of elastomers is known to depend on the rate of crack propagation. It has been proposed that rate dependent chain scission, where bonds on the polymer chains are ruptured under mechanical stress, is a contributing factor to this rate dependence. To model this process we introduce chain scission, predicted using concepts of mechanochemistry, into a hyperelastic constitutive model (Arruda-Boyce as an example). The result is a model capable of handling large strain and rate dependent damage. Additionally, polydispersity is incorporated by considering a distribution of chain lengths, which gives the model the capability to predict progressive material damage. To demonstrate the application of the model, uniaxial tensile deformation with constant extension rates is examined. The tensile stress is found to first reach a peak and then decrease due to scission, and faster rates of deformation result in larger peak stress. The model has also been implemented in a finite element subroutine to demonstrate its application to crack initiation.

000014184 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000014184 653__ $$a

000014184 7112_ $$a24th International Congress of Theoretical and Applied Mechanics$$cMontreal (CA)$$d2016-08-21 / 2016-08-26$$gICTAM2016
000014184 720__ $$aLavoie, Shawn
000014184 8560_ $$ffischerc@itam.cas.cz
000014184 8564_ $$s211909$$uhttps://invenio.itam.cas.cz/record/14184/files/PO.SM03-1.11.213.pdf$$yOriginal version of the author's contribution as presented on CD,  page 1862, code PO.SM03-1.11.213
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000014184 962__ $$r13812
000014184 980__ $$aPAPER