An explicit model of expanding cylindrical shells subjected to high explosive detonations

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Description

A viscoplastic constitutive model was formulated to model the high strain-rate expansion of thin cylindrical shells subjected to internal explosive detonations. This model provides insight into the development of plastic instabilities, which occur on the surface of the shells prior to failure. The effects of shock heating and damage in the form of microvoid nucleation, growth, and coalescence were incorporated using the Johnson-Cook strength model with the Mie-Grueneisen equation of state and a modified Gurson yield surface. This model was implemented into ABAQUS/Explicit as a user material subroutine. A cylindrical copper shell was modeled using both axisymmetric and plane strain ... continued below

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15 p.

Creation Information

Martineau, R.L.; Prime, M.B.; Anderson, C.A. & Smith, F.W. April 1, 1999.

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Description

A viscoplastic constitutive model was formulated to model the high strain-rate expansion of thin cylindrical shells subjected to internal explosive detonations. This model provides insight into the development of plastic instabilities, which occur on the surface of the shells prior to failure. The effects of shock heating and damage in the form of microvoid nucleation, growth, and coalescence were incorporated using the Johnson-Cook strength model with the Mie-Grueneisen equation of state and a modified Gurson yield surface. This model was implemented into ABAQUS/Explicit as a user material subroutine. A cylindrical copper shell was modeled using both axisymmetric and plane strain elements. The high explosive material inside of the cylinder was simulated using the high explosive burn model in ABAQUS/Explicit. Two experiments were conducted involving explosive-filled, copper cylinders and good agreement was obtained between the numerical results and experimental data.

Physical Description

15 p.

Notes

OSTI as DE99002224

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  • ABAQUS users` conference, Chester (United Kingdom), 25-28 May 1999

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  • Other: DE99002224
  • Report No.: LA-UR--99-564
  • Report No.: CONF-990504--
  • Grant Number: W-7405-ENG-36
  • DOI: 10.2172/334315 | External Link
  • Office of Scientific & Technical Information Report Number: 334315
  • Archival Resource Key: ark:/67531/metadc685537

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  • April 1, 1999

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • Feb. 25, 2016, 4:37 p.m.

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Martineau, R.L.; Prime, M.B.; Anderson, C.A. & Smith, F.W. An explicit model of expanding cylindrical shells subjected to high explosive detonations, report, April 1, 1999; New Mexico. (digital.library.unt.edu/ark:/67531/metadc685537/: accessed August 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.