کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
807101 | 1468326 | 2014 | 14 صفحه PDF | دانلود رایگان |
• Cruciform specimens with an inclined crack subject to biaxial loads are used to study the fatigue crack growth rate.
• A method for infiltrating the mixed mode displacement of cracks in the deformed state is suggested.
• The combined effect of load biaxiality and crack orientation on the crack growth rate is made explicit.
Cruciform specimens of two configurations with an inclined crack subject to a system of biaxial loads are used to study the fatigue crack growth rate. A method for infiltrating the mixed mode displacement of cracks in the deformed state is suggested. For the particular specimen geometries considered, the T-stress and the geometry dependent correction factors, as well as the numerical constant of the plastic stress distributions In, are obtained as a function of the dimensionless crack length, load biaxiality and mode mixity. The combined effect of load biaxiality and crack orientation on the crack growth rate for low-strength and high-strength steels is made explicit. Additionally, a comparative study of a cruciform specimen with a working area thinned with respect to a flat cruciform specimen is performed through experiments and numerical computations under various mixed mode biaxial loading conditions.
Journal: Theoretical and Applied Fracture Mechanics - Volume 73, October 2014, Pages 68–81