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

Lami theorem - mechanics, Explain lami's theorem: Sol.: Lami's theore...

Explain lami's theorem: Sol.: Lami's theorem states that "If the three coplanar forces which are acting at a point be in equilibrium, then every force is proportional to sin

Area Moment of Inertia, Are a Moment of Inertia Moment of force about ...

Are a Moment of Inertia Moment of force about a point is product of the force ( F ) and perpendicular distance ( d ) between point and line of action of that is F.d. This mome

Static friction, Static Friction: When applied force is less than limiting...

Static Friction: When applied force is less than limiting friction, body remains at rest and this type of frictional force is called as static friction and this law is called as l

Define the plastic materials-polymers processing methods, Plastic Materials...

Plastic Materials/Polymers processing methods. Under this category are included the various methods for processing plastic material/polymers for example, shape casting, the

Scope of pipeline systems, Q. Scope of pipeline systems? This specifica...

Q. Scope of pipeline systems? This specification covers the specific materials, surface preparation, method of application, quality assurance, and repair necessary for the appl

Dynamically equivalent link-fluctuation of the energy, Dynamically Equivale...

Dynamically Equivalent Link: this is link that has point masses at two points such that (a) overall mass is same, (b) centre of gravity is at the similar position, and (c) mass m

Explain the isolated system - thermodynamic, Explain the Isolated System - ...

Explain the Isolated System - Thermodynamic In an Isolated system, neither masses nor energy are permitted to cross the boundary. The system comprises certain mass and energy.

Evaluation of force exerted by jet on the plate, (a) What are the assumptio...

(a) What are the assumptions made during evaluation of force exerted by jet on the plate ? (b) A jet of water which has diameter of 8 cm. issues with a velocity of 40 m/sec. and

Frames, what is a deficient frame?

what is a deficient frame?

Applications of cutting tool materials, Discuss the method of properties, m...

Discuss the method of properties, manufacturing and applications of following cutting tool materials: (i) Carbides (ii) Ceramics (iii) Cubic Boron Nitride (CBN) What ar

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