Fatigue crack propagation, Mechanical Engineering

Assignment Help:

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


Related Discussions:- Fatigue crack propagation

Evaluate the directions and magnitude of principal stresses, (a) At a point...

(a) At a point in a material under stress, the resultant intensity of stress across a certain plan is 100 N/mm 2 (compressive) inclined at 30 o to its normal. On another plane th

Ventilation process of plant, Q. Ventilation process of plant? Due to t...

Q. Ventilation process of plant? Due to the possibility of accidental discharges of flammable gas and flashing liquid (e.g. leaks, incorrect valve opening, sampling, etc.); ade

Explain casting processes, Casting processes Casting processes. Here, t...

Casting processes Casting processes. Here, the metal in the molten state is poured into a mould and allowed to solidify into a shape. The mould may be expendable or permanent.

Determine the maximum bending stresses, Evaluate the maximum bending stress...

Evaluate the maximum bending stresses: A beam of I-section illustrated in Figure is simply supported over a span of 10 m. It carries an uniform load of 4 kN/m over the whole s

Scanning electron microscope, 1- Explain the rationale of using a small WD ...

1- Explain the rationale of using a small WD to improve resolution. 2- In a tungsten SEM , Why does a high accelerating voltage provide the potential for higher resolution?  Why

Determine about the pier and well foundations, Pier and Well Foundations ...

Pier and Well Foundations Pier foundations are used when the loads to be transmitted are heavier than loads those can bc acconlplished by piles. They are essentially bearing i

Tensile stress, T ensile Stress: The stress induced in a body, when ...

T ensile Stress: The stress induced in a body, when subjected to two equal and opposite pulls as shown in figure (a) as a result of which there is an increase in length,

Tempering and stabilization, Tempering and Stabilization: Tempering o...

Tempering and Stabilization: Tempering of tool steel in heat treatment is again a significant step. The quenching of such steels reasons the existence of untempered martensit

Biofluids mechanics, in fontan circulation that is represented as a circuit...

in fontan circulation that is represented as a circuit

Evaluate the speed of shaft, Two shafts A and B are co-axial. A gear C (50 ...

Two shafts A and B are co-axial. A gear C (50 teeth) is rigidly mounted on shaft A. A compound gear D-E gears with C and an internal gear G. D has 20 teeth and gears with C and E h

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd