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

Compound BArs, three vertical, parallel straight rods, each 2.6m in length ...

three vertical, parallel straight rods, each 2.6m in length have their upper ends firmly secured and their lower supporting a rigid horizontal bar with a weight of 8KN, which cause

What is blow molding, Q. What is Blow molding ? Blow molding has been u...

Q. What is Blow molding ? Blow molding has been used for making plastic bottles, toys, doll bodies and many other items. The blow molding commences with the extrusion of the t

Patching touch up stick, Q. Patching touch up stick? Pipe requiring lim...

Q. Patching touch up stick? Pipe requiring limited coating repair resulting from scars, slivers, holidays, etc. shall be repaired by an OWNER approved patching system. The amou

Calculating the maximum moment, Select a standard rolled steel I-section fo...

Select a standard rolled steel I-section for the simply supported beam shown in figure below.  Select an appropriate factor of safety and material strength.  Include references for

Calculate the response of the system, A Spring - mass system which is subje...

A Spring - mass system which is subjected to a harmonic force FCoswt. calculate the response of the system, refer figure Given x (0) = 0.01 m x(0) = 0.04 m/sec w = 30 rad/

Compute efficiency of dual cycle, (a) Compare 2 two-stroke cycle engines wi...

(a) Compare 2 two-stroke cycle engines with 4 stroke cycle engines. What are the function of flywheel and Cam Shaft? (b) Derive a mathematical expression for efficiency of dual

Estimate the machining time, Estimate the Machining Time A hollow work...

Estimate the Machining Time A hollow workpiece of 60 mm outside diameter and 150 mm length is held on a mandrel among centers and turned all over in 4 passes. If the approach

Design an evaporator system, Q. Design an Evaporator System? The Evapor...

Q. Design an Evaporator System? The Evaporator System is designed to produce high quality distillate. The feed water to the evaporator system is dosed with antiscalant and rece

Cad, nc & cnc machines

nc & cnc machines

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