Micromechanical modeling of the tensile behavior of oriented polyethylene

Autor: van Jaw Hans Dommelen, Leon Le Govaert, van Lca Lambèrt Breemen, Bag Bernard Schrauwen
Přispěvatelé: Mechanics of Materials, Processing and Performance
Jazyk: angličtina
Rok vydání: 2004
Předmět:
Zdroj: Journal of Polymer Science, Part B: Polymer Physics, 42(16), 2983-2994. Wiley
ISSN: 1099-0488
0887-6266
DOI: 10.1002/polb.20164
Popis: The stacked lamellar morphology commonly found in extruded semicrys- talline materials has a strong influence on the flow direction, with respect to the loading direction, and on the stability and localization phenomena in tensile experiments. A multiscale numerical model was used to simulate the effect on the macroscopic behavior of a stacked lamellar microstructure. The model established a link between the micro- scopic, the mesoscopic, and the macroscopic levels. The constitutive properties of the material were identified for the crystallographic and amorphous domains. The average fields of an aggregate of individual phases, having preferential orientations, formed the constitutive behavior of the extruded material. The microscopic morphology of the extruded high-density polyethylene is based on wide-angle X-ray diffraction experi- ments. The macrostructure was described by a finite element model. The microstruc- ture-induced deformation hardening in the extrusion direction was found to stabilize the macrostructure when it was loaded in the flow direction. © 2004 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 42: 2983-2994, 2004
Databáze: OpenAIRE
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