Mixed-mode fracture of ceramics
The mixed-mode fracture behavior of ceramic materials is of importance for monolithic ceramics in order to predict the onset of fracture under generalized loading conditions and for ceramic composites to describe crack deflection toughening mechanisms. Experimental data on surface flaw mixed-mode fracture in various ceramics indicate that the flaw-plane normal stress at fracture decreases with increasing in-flaw-plane shear stress, although present data exhibit a fairly wide range in details of this sigma - tau relationship. Fracture from large cracks suggests that Mode II has a greater effect on Mode I fracture than Mode III. A comparison of surface flaw and large crack mixed-mode I-II fracture responses indicated that surface flaw behavior is influenced by shear resistance effects.
- Research Organization:
- Los Alamos National Lab., NM (USA)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 5625555
- Report Number(s):
- LA-UR-85-2195; CONF-8506128-2; ON: DE85014087
- Country of Publication:
- United States
- Language:
- English
Similar Records
Mixed-mode fracture criteria for reliability analysis and design with structural ceramics
Mixed-mode fracture of ceramics in asymmetric four-point bending: Effect of crack-face grain interlocking/bridging