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RESEARCH PAPERS

Characterization of Multiaxial Constitutive Properties of Rubbery Polymers

[+] Author and Article Information
V. Chakkarapani, K. M. Liechti

Center for Mechanics of Solids, Structures, and Materials, Department of Aerospace Engineering and Engineering Mechanics, The University of Texas at Austin, Austin, TX 78712-0235

K. Ravi-Chandar1

Center for Mechanics of Solids, Structures, and Materials, Department of Aerospace Engineering and Engineering Mechanics, The University of Texas at Austin, Austin, TX 78712-0235kravi@mail.utexas.edu

TRI/Austin Inc.

1

Corresponding author.

J. Eng. Mater. Technol 128(4), 489-494 (Mar 22, 2006) (6 pages) doi:10.1115/1.2345439 History: Received January 04, 2006; Revised March 22, 2006

Rubbery response of polyurea is examined under monotonic loading in the confined compression, composite compression, and Arcan shear configurations. For polyurea prepared by a casting process, it is shown that while the bulk response is significantly nonlinear, and well fitted by the Tait equation, the shear resistance is extremely small. In contrast, polyurea formed by a spray process shows significant compressibility, inelastic volumetric deformation, and significantly enhanced shear resistance.

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Copyright © 2006 by American Society of Mechanical Engineers
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Figures

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Figure 1

Confined compression configuration for multiaxial constitutive characterization

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Figure 2

Composite compression configuration for multiaxial constitutive characterization

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Figure 3

The Arcan specimen configuration for determination of shear response

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Figure 4

Uniaxial stress-strain response of two types of polyurea

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Figure 5

Variation of the axial stress with axial strain for the cast polyurea in the confined compression apparatus

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Figure 6

Variation of the mean stress with volume dilatation for polyurea

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Figure 7

Comparison of shear response of cast and sprayed polyurea in the Arcan test configuration and the confined compression configuration

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Figure 8

Variation of the axial and radial stress in the cast polyurea with axial loading

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Figure 9

Bulk and shear response of the cast polyurea in the composite cylinder configuration

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