Use of the Steinberg and Carroll-Holt Concepts in Ductile Fracture
Abstract
We have extended the SRI ductile fracture model (DFRACT) for spall behavior of aluminum and copper. The temperature computation procedure, thermal strength reduction function, work hardening, and Bauschinger effects from the Steinberg model ( D. J. Steinberg, S. G. Cochran, and M. W. Guinan, J. Appl. Phys. 51, 1498 (1980))were added. The threshold stress for void growth in the DFRACT model was equated to the stress for general yielding in the Carroll-Holt model (M. M. Carroll and A. C. Holt, J. Appl. Phys. 43, 1626 (1972)) for porous materials. With these modifications of DFRACT, we simulated a series of earlier SRI impacts in 1145 (commercially pure) aluminum in which partial spall had been reached. The revised model was able to represent the numbers, sizes, and locations of voids through the sample. The use of the Carroll-Holt and Steinberg model features allows the DFRACT model to reach larger void volumes in the simulations and therefore to better represent heavy damage.
- Publication:
-
APS Shock Compression of Condensed Matter Meeting Abstracts
- Pub Date:
- July 1997
- Bibcode:
- 1997APS..SHK..R101S