Mechanisms for hackle formation and crack branching
Conference
·
OSTI ID:535642
- Beauchamp Associates, Albuquerque, NM (United States)
Optical, SEM, and TEM microscopy and interference microscopy were used to conduct a detailed examination of fracture surfaces and macroscopic branching events produced in high velocity fracture of soda-lime glass. Results of that examination were compared with various models for the generation of hackle and branching. Most observations in this study and in the literature are consistent with a model in which the edge of the crack surface remains completely connected, i.e., no microcracking in advance of the crack tip. Concepts are presented that explain the existence of the mist/hackle boundary, the crack branching process, and the low terminal velocity commonly observed for fracture in silicate glasses.
- OSTI ID:
- 535642
- Report Number(s):
- CONF-950739--
- Country of Publication:
- United States
- Language:
- English
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