Application of faceted yield surfaces for simulating compression tests of textured materials

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Constitutive modeling used for most forming calculations assume an isotropic yield function with isotropic hardening. This assumption usually takes the form of an isotropic elastic stiffness tensor, a realistic flow stress model and a von Mises yield function. Real materials deviate from isotropy both in elasticity and plasticity. The calculations described here relax the assumptions of isotropic elasticity and plasticity by utilizing direct measurements of the elastic stiffness tensor and anisotropic representations of yield surfaces, in particular surfaces tessellated from direct measurements of material texture. This effort validates the use of such constitutive modeling by simulating quasi-static, uniaxial stress compression ... continued below

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9 p.

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Maudlin, P. J.; Wright, S. I.; Gray, G. T., III & House, J. W. September 1995.

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Description

Constitutive modeling used for most forming calculations assume an isotropic yield function with isotropic hardening. This assumption usually takes the form of an isotropic elastic stiffness tensor, a realistic flow stress model and a von Mises yield function. Real materials deviate from isotropy both in elasticity and plasticity. The calculations described here relax the assumptions of isotropic elasticity and plasticity by utilizing direct measurements of the elastic stiffness tensor and anisotropic representations of yield surfaces, in particular surfaces tessellated from direct measurements of material texture. This effort validates the use of such constitutive modeling by simulating quasi-static, uniaxial stress compression and Taylor Cylinder impact, and comparing their cross-sectional ``footprints`` to experimental data.

Physical Description

9 p.

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OSTI as DE95016962

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  • 4. international conference on metallurgical and materials applications of shock-wave and high-strain-rate phenomena, El Paso, TX (United States), 6-10 Aug 1995

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  • Other: DE95016962
  • Report No.: LA-UR--95-2728
  • Report No.: CONF-950856--2
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 102232
  • Archival Resource Key: ark:/67531/metadc623578

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  • September 1995

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  • June 16, 2015, 7:43 a.m.

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  • Nov. 18, 2015, 6:23 p.m.

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Maudlin, P. J.; Wright, S. I.; Gray, G. T., III & House, J. W. Application of faceted yield surfaces for simulating compression tests of textured materials, article, September 1995; New Mexico. (digital.library.unt.edu/ark:/67531/metadc623578/: accessed May 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.