This article presents a computational constitutive model for glass subjected to large strains, high strain rates and high pressures. The model has similarities to a previously developed model for brittle materials by Johnson, Holmquist and Beissel (JHB model), but there are significant differences. This new glass model provides a material strength that is dependent on the location and/or condition of the material. Provisions are made for the strength to be dependent on whether it is in the interior, on the surface (different surface finishes can be accommodated), adjacent to failed material, or if it is failed. The intact and failed strengths are also dependent on the pressure and the strain rate. Thermal softening, damage softening, time-dependent softening, and the effect of the third invariant are also included. The shear modulus can be constant or variable. The pressure-volume relationship includes permanent densification and bulking. Damage is accumulated based on plastic strain, pressure and strain rate. Simple (single-element) examples are presented to illustrate the capabilities of the model. Computed results for more complex ballistic impact configurations are also presented and compared to experimental data.
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September 2011
Research Papers
A Computational Constitutive Model for Glass Subjected to Large Strains, High Strain Rates and High Pressures
Timothy J. Holmquist,
Timothy J. Holmquist
Southwest Research Institute
, 5353 Wayzata Blvd., Minneapolis, MN 55416
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Gordon R. Johnson
Gordon R. Johnson
Southwest Research Institute
, 5353 Wayzata Blvd., Minneapolis, MN 55416
Search for other works by this author on:
Timothy J. Holmquist
Southwest Research Institute
, 5353 Wayzata Blvd., Minneapolis, MN 55416
Gordon R. Johnson
Southwest Research Institute
, 5353 Wayzata Blvd., Minneapolis, MN 55416J. Appl. Mech. Sep 2011, 78(5): 051003 (9 pages)
Published Online: July 27, 2011
Article history
Received:
October 15, 2010
Revised:
May 6, 2011
Online:
July 27, 2011
Published:
July 27, 2011
Citation
Holmquist, T. J., and Johnson, G. R. (July 27, 2011). "A Computational Constitutive Model for Glass Subjected to Large Strains, High Strain Rates and High Pressures." ASME. J. Appl. Mech. September 2011; 78(5): 051003. https://doi.org/10.1115/1.4004326
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