Date of Award
Doctor of Philosophy
Materials Science and Engineering
A mathematical analysis of the stress field of dislocations in a slip plane was applied to explain the optical birefringence in sodium chloride during plastic deformation. This high birefringence of slip planes accompanying plastic deformation, without appreciable isoclinic or isochromatic birefringence, makes it possible to study the plastic zone at the crack tip and the mechanisms of fracture. Three-point bending at a slow test speed was used to calculate the work of fracture (W(,wof)), the crack driving force (G), the crack propagation resistance (R), and the plastic energy dissipation rate ((phi)(,p)). The work of fracture and first maximum load are suggested as parameters suitable to indicate the occurrence of brittle to ductile transition.
Digital Repository @ Iowa State University, http://lib.dr.iastate.edu/
Huang, Bai-Yun, "Work of fracture of sodium chloride single crystals " (1986). Retrospective Theses and Dissertations. 8255.