Numerical simulation of fracture
A constructive model for brittle, and quasi-brittle materials is described. The Bedded Crack Model contains a microphysical description of fracture based on Griffith theory. The effect of cracks on material properties is described by effective modulus theory. Underlying the model is a statistical framework in which the evolution in time of a statistical distribution of cracks is calculated. The theory upon which the model is based is described. The model is implemented in a finite difference computer code. Our model is contrasted with the phenomenologic models usually found in computer codes. A computational simulation of the strain rate dependence of failure stress is presented and compared with laboratory data. A simulation of a gas gun experiment is presented, and the mechanism of spall described.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 6940333
- Report Number(s):
- LA-UR-82-2167; CONF-830104-3; ON: DE82019532
- Resource Relation:
- Conference: International conference on constitutive laws for engineering materials: theory and application, Tucson, AZ, USA, 10 Jan 1983
- Country of Publication:
- United States
- Language:
- English
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