Improved Modelling of Bauschinger Effects in Plastic Flow

Award Information
Agency:
Department of Defense
Branch
Air Force
Amount:
$52,729.00
Award Year:
1993
Program:
SBIR
Phase:
Phase I
Contract:
n/a
Award Id:
20019
Agency Tracking Number:
20019
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
894 Ross Drive, Suite 205, Sunnyvale, CA, 94089
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
Jeffrey R. Sachs
(408) 745-1800
Business Contact:
() -
Research Institute:
n/a
Abstract
The research and development proposed here closes the gap on an important area of simulating material behavior. In particular, anisotropic models of the Bauschinger effect have been neglected in the development of hydrocodes for the simulation of viscoplastic behavior, in spite of its important to both impact and penetration phenomena. The Bauschinger effect is fundamental to the proper simulation and design of ballistic weapons and defenses, space structures, and many other critical metal allow structures subject ot impacts. The proposed work will demonstrate the feasibility of implementing a new model of the Bauschinger effect. The new viscoplastic constitutive model will be based on well established internal variable representations of nonlinear kinematic hardening which properly account for the rate and temperature dependence, large straing kinematics, and suitable corotational stress rate. The model will be implemented using an existing Lagrangian finite element package, and will be verified by comparing simulation predictions with experimental results for several common experimental configurations.

* information listed above is at the time of submission.

Agency Micro-sites


SBA logo

Department of Agriculture logo

Department of Commerce logo

Department of Defense logo

Department of Education logo

Department of Energy logo

Department of Health and Human Services logo

Department of Homeland Security logo

Department of Transportation logo

Enviromental Protection Agency logo

National Aeronautics and Space Administration logo

National Science Foundation logo
US Flag An Official Website of the United States Government