A stochastic model and a method of simulation of the initiation and the early propagation of creep-fatigue small cracks along grain boundaries were proposed. In the model, grain boundaries between two adjacent triple points were projected and linked on a straight line perpendicular to the applied stress axis, and their length was given as random variables of a normal distribution. The grain boundaries had their own fracture resistances, the magnitudes of which were given as uniform random numbers. The fracture resistance of each grain boundary decreased by a constant magnitude corresponding to the driving force of one fatigue cycle. When the resistance became zero or a negative value, the grain boundary was assumed to fracture and to yield an intergranular facet of small crack.
|Number of pages||5|
|Journal||American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP|
|Publication status||Published - Dec 1 1989|
|Event||Seismic Engineering - 1989: Design, Analysis, Testing, and Qualification Methods - Honolulu, HI, USA|
Duration: Jul 23 1989 → Jul 27 1989
ASJC Scopus subject areas
- Mechanical Engineering