An explicit model of expanding cylindrical shells subjected to high explosive detonations
- Los Alamos National Lab., NM (United States)
- Colorado State Univ., Fort Collins, CO (United States)
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.
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 334315
- Report Number(s):
- LA-UR-99-564; CONF-990504-; ON: DE99002224; TRN: AHC29914%%119
- Resource Relation:
- Conference: ABAQUS users` conference, Chester (United Kingdom), 25-28 May 1999; Other Information: PBD: [1999]
- Country of Publication:
- United States
- Language:
- English
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