Fatigue crack propagation, Mechanical Engineering

Fatigue crack propagation:

If it is assumed that no plastic deformation occurs around crack tip and law of fatigue crack propagation for place of above Example is da/dN =  10- 8 (Δ KI eff )2.0 mm/cycle , find after how many cycles the plate will fracture.

Solution

Δ K I = ΔK I eff     because there is no plastic deformation in crack tip neighbourhood.

1926_Fatigue crack propagation.png

ac = 146.14 mm, ai = 35 mm from above Example .

or, Nf   =2´104 ln ( ac/ ai) =  2´104 ln (146.14/35)

or, N f  = 2´104 ln (4.175) = 28584 cycles

Posted Date: 1/23/2013 3:07:47 AM | Location : United States







Related Discussions:- Fatigue crack propagation, Assignment Help, Ask Question on Fatigue crack propagation, Get Answer, Expert's Help, Fatigue crack propagation Discussions

Write discussion on Fatigue crack propagation
Your posts are moderated
Related Questions
(a ) What are the demerits and merits of sliding mesh gear box? (b) Show a four speed gear box, including reverse speed for a passenger car and illustrate how the speed ratio is

Determine the moment of forces: The side of a square ABCD is 1.60 m long .Four forces equal to 6, 5, 4 and 8 N acts respectively along with the line CB, BA, DA, DB. Determine

Q. Can you explain Pattern Allowances? The difference in the dimensions of the casting and the patterns is due to the various allowances considered while designing a pattern fo

case study for factors affecting process design decisions

what is cone friction?

what force will be neccesary to just maintain a body at equilibrium in a body weighing 914.5kg along the horizontal plane

Short-Term Scheduling And Control The major objective at this stage is to make sure the efficient and smooth operation of the system in the event of unforeseen disturbances. Th

Geometric Defects   Undercut Undercut represents a depression into the base metal adjacent to the toe of the weld and if it forms a notch, it is a potential danger for th

a) What are essential needs of a job evaluation plan. Illustrate the point plan method b) Describe factor comparison method of job evaluation. a) What are basic objectives an

Working of Telescopic Hydraulic Fork:   When a road shock exerts on to the suspension system it is transmitted to the spring instead of motorcycle frame and the spring starts to o