George W Quinn, Dianne O-Leary, Janet B. Quinn
Abstract
A computer program was written to model the propagation of two-dimensional
traveling cracks in a biaxially-stressed glass disk. This was accomplished
by using a combination of known fractographic equations and empirical observations
with generic algorithms for generating fractals. Inputs include material
property data, fracture load, disk size, and the sizes of the load-bearing
rings. The outputs include fracture stress, initial crack size before branching,
and a prediction of the expected number of radial cracks. A typical image
of a fractured disk with the input conditions is also produced. The image
incorporates empirically-determined randomness and a degree of crack curvature
dependent on the stress state. The program is user-friendly, and may be
easily adapted for other materials and conditions.
Author's information
Name: Dianne O’Leary
Division: Mathematical and Computational Sciences Division (891)
Laboratory: ITL
Room and Building address: NIST North (820), Room 389
Mail Stop: 8910
Telephone: x2719
email: oleary@nist.gov
Sigma Xi member? No
Name: Janet B. Quinn
Division: Polymers (854)
Laboratory: MSEL
Room and Building address: Polymers (224), Room B148
Mail Stop: 8546
Telephone: x5369
email: janet.quinn@nist.gov
Sigma Xi member? No