Laser-Induced Controlled Flaw Testing in Ceramics.
Abstract
The present investigation yields significant results in controlling crack formation in transparent ceramic crystals (LiF, MgO, ZrO2, and Al2O3), as well as in amorphous solids (fused quartz and PMMA) through a series of systematic experimentations and theoretical modeling of the laser-solid interaction. The impact of such success is the extension of another dimension in the investigation of many mechanical and physical problems from the current two-dimensional simplifications to three-dimensional phenomena. The critical control of the formation of internal cracks allowed us, for the first time to examine the interaction of three-dimensional cracks in PMMA and fused quartz, and to validate the general predictions of the available theoretical analyses. We also studied the interaction of a penny-shaped internal crack and dislocations in lithium fluoride single crystals, a phenomenon currently under renewed extensive investigation for fundamental understanding of the ductile vs. brittle behavior of solids.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 1996
- Accession Number
- ADA317087
Entities
People
- J. P. Huennekens
- M. P. Harmer
- Y. T. Chou
Organizations
- Lehigh University