Impact produced stress waves in composites

Conference · Thu May 01 00:00:00 EDT 1997

OSTI ID:515559

Clements, B; Johnson, J; Addessio, F; Hixson, R

The Nonhomogenized Dynamic Method of Cells (NHDMOC) is used to study the propagation of stress waves through laminates. The accuracy of the theory is tested by applying it to a plate-impact experiment and checking its ability to resolve a propagation shock wave front. The theory is then compared to Lagrangian hydrodynamic calculations, where it is found that the NHDMOC consistently requires less fine spatial and temporal grids, and less artificial viscosity to control numerical noise. The theory is then used to treat the impact of an epoxy-graphite bilaminate. When the viscoelastic properties of the epoxy are accounted for, the theory agrees well with the experiment.

• Research Organization: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: Department of Defense, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 515559
• Report Number(s): LA-UR-97-788; CONF-970944-4; ON: DE97005016; TRN: AHC29718%%74
• Resource Relation: Conference: International conference on mechanical and physical behavior of materials under dynamic loading (EURO/DYMAT), Toledo (Spain), 22-26 Sep 1997; Other Information: PBD: [1997]
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COMPOSITE MATERIALS
IMPACT TESTS
MATHEMATICAL MODELS
SHOCK WAVES
CALCULATION METHODS
WAVE PROPAGATION
IMPACT SHOCK
COMPARATIVE EVALUATIONS
ELASTICITY