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A Deformation Model of Monotropic Plastic Foams in Shear Perpendicularly to the Isotropy Plane |
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| Authors: | Beverte I |
| Institution: | (1) Institute of Polymer Mechanics, University of Latvian, Aizkraukles St. 23, Riga, LV-1006, Latvia |
| Abstract: | Based on an ellipsoidal model for the cellular structure of monotropic plastic foams, their deformational properties in shear perpendicularly to the isotropy plane are predicted. The theoretical results are obtained for the case of pure shear. The deformation energy is calculated by the method of coordinates assuming that the polymer struts of the structure can change both their length and orientation. Numerical values of shear moduli are found for monotropic and isotropic plastic foams, which agree satisfactorily with the experimental data for polyurethane and polyvinylchloride foams available in the literature. |
| Keywords: | plastic foams monotropy ellipsoidal model cell polymer struts polymer knot degree of extension shear deformation pure share shear angle deformation energy isotropy plane effective Young's moduli numerical calculations experimental data comparison |
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