Determine the fatigue strength of medium carbon steel, Mechanical Engineering

Assignment Help:

Determine the fatigue strength of medium carbon steel:

For determining the fatigue strength of medium carbon steel 15 specimens, identical in all respect were tested in cantilever rotating beam fatigue testing machine. The ultimate tensile strength of steel was known to be 550 MPa and test began at 275 MPa with a fixed step of 5 MPa. Determine the fatigue strength if results obtained are described below.

2309_Determine the fatigue strength of medium carbon steel.png

Solution

As a first step plot survival (o) and failure (x) pattern form visual depiction. From the plot it is seen that the lowest level at which survival is obtained is σo = 275 MPa. Calculations are made by the help of the table.

483_Determine the fatigue strength of medium carbon steel1.png

Figure: Failures Survival Pattern

Eq. (22) is utilized for calculating fatigue strength, σe.

1253_Determine the fatigue strength of medium carbon steel2.png

Substituting

1963_Determine the fatigue strength of medium carbon steel3.png

σ e  = 275 + 5 (( 7/8) + (1/2))

= 281.875 MPa.

Say 282 MPa    (Ans.)


Related Discussions:- Determine the fatigue strength of medium carbon steel

Explain a cone clutch, Explain a cone clutch. How this clutch is designed. ...

Explain a cone clutch. How this clutch is designed. It is needed to design a rigid type of flange coupling to connect two shafts. The input shaft transmits 37.5 kW power at 180

Plot plan alignment, Plot Plan Alignment Generally the process units w...

Plot Plan Alignment Generally the process units will be positioned in process flow order, with common utility blocks positioned to provide economical and effective services. P

Jet pump, full detail of jet pump nozzle design

full detail of jet pump nozzle design

Concept of continuum - thermodynamics, Concept of continuum - thermodynamic...

Concept of continuum - thermodynamics: Sol: Even the simplification of matter into molecules, atoms, electrons, etc. is too complex a picture for many problems of thermodyna

What is, what is soundness of casting.

what is soundness of casting.

Essay, which topics i should take from mechanical engineering to compare th...

which topics i should take from mechanical engineering to compare them

Dom, what is offset inertia force

what is offset inertia force

Sum of horizontal and vertical components, Sum of horizontal and vertical c...

Sum of horizontal and vertical components: The two forces shown in the figure, are to be replaced by an equivalent force R applied at P . Locate point P by finding its d

Illustrate the first law of thermodynamics, (a) Illustrate the First Law of...

(a) Illustrate the First Law of Thermodynamics for a closed system undergoing a cycle. (b) A piston and cylinder machine contains a fluid system which passes through a complete

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