Viscoelastic models for explosive binder materials

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Description

An improved model of the mechanical properties of the explosive contained in conventional munitions is needed to accurately simulate performance and accident scenarios in weapons storage facilities. A specific class of explosives can he idealized as a mixture of two components: energetic crystals randomly suspended in a polymeric matrix (binder). Strength characteristics of each component material are important in the macroscopic behavior of the composite (explosive). Of interest here is the determination of an appropriate constitutive law for a polyurethane binder material. This paper is a continuation of previous work in modeling polyurethane at moderately high strain rates and for ... continued below

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7 p.

Creation Information

Bardenhagen, S. G.; Harstad, E. N.; Maudlin, P. J.; Gray, G. T. & Foster, J. C., Jr. July 1997.

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Description

An improved model of the mechanical properties of the explosive contained in conventional munitions is needed to accurately simulate performance and accident scenarios in weapons storage facilities. A specific class of explosives can he idealized as a mixture of two components: energetic crystals randomly suspended in a polymeric matrix (binder). Strength characteristics of each component material are important in the macroscopic behavior of the composite (explosive). Of interest here is the determination of an appropriate constitutive law for a polyurethane binder material. This paper is a continuation of previous work in modeling polyurethane at moderately high strain rates and for large deformations. Simulation of a large deformation (strains in excess of 100%) Taylor Anvil experiment revealed numerical difficulties which have been addressed. Additional experimental data have been obtained including improved resolution Taylor Anvil data, and stress relaxation data at various strain rates. A thorough evaluation of the candidate viscoelastic constitutive model is made and possible improvements discussed.

Physical Description

7 p.

Notes

OSTI as DE98000622

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  • Meeting of the topical group on shock compression of condensed matter of the American Physical Society, Amherst, MA (United States), 27 Jul - 1 Aug 1997

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  • Other: DE98000622
  • Report No.: LA-UR--97-2864
  • Report No.: CONF-970707--
  • Grant Number: W-7405-ENG-36
  • DOI: 10.2172/627369 | External Link
  • Office of Scientific & Technical Information Report Number: 627369
  • Archival Resource Key: ark:/67531/metadc695546

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • July 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • Nov. 30, 2015, 1:02 p.m.

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Bardenhagen, S. G.; Harstad, E. N.; Maudlin, P. J.; Gray, G. T. & Foster, J. C., Jr. Viscoelastic models for explosive binder materials, report, July 1997; New Mexico. (digital.library.unt.edu/ark:/67531/metadc695546/: accessed November 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.