ISSN:
1460-2695
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract— Fatigue crack growth after a biaxial overload has been investigated. The crack retardation parameters, ND, and, aD, do not have monotonous dependencies on the biaxial stress ratio, λ, because the shear stress, τIII, acting in the perpendicular direction of the specimen face, influenced the values of these parameters.It has been found that the plastic zone size parameters, rab, and Δ, do not increase monotonously with increasing λ ratio. The plastic zone size in the crack growth direction, rho=aD13, was calculated on the basis of newly proposed relations.Crack growth after an overload was simulated on the basis of the equivalent mode I stress intensity factor, ICC, invoking a unified kinetic diagram and calculated crack increments, aD13 and aD=Δc, where Δc is the maximum value of the calculated size of plastic zone. The experimental data for crack growth after an overload had good agreement with the calculated data.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1460-2695.1997.tb01524.x
