Couldn't ask for more ... No unnecessary talks .. .only to the point pure explanation ❤️

Great explanation, thank you sir. I got to understand fatigue better

Thank you from Italy for posting this interesting video

Helped me to score really good marks in my semester examination on Material Science and Engineering.

Very good source for students of other colleges

Thanks, Really good explanation and great examples.

Many thanks sir for concept clear , east and best

Nicely explaination how about for rubber material is it the same

Thank you sir... you have been very helpful for my revision of concepts..

@boinivenkatamma3427

5 жыл бұрын

Tq sir

@nikhilkumbhar2551

2 жыл бұрын

@@boinivenkatamma3427 à

Ak number...

Thank you sir from Bangladesh

neat explanation of all required concepts...

but why does fatigue occurs? on microscopic levdl?

thank you sir

Dear Sir, Last day I had an interview at IIT Jammu, Professor asked me why non-ferrous materials don't show a real endurance limit(Horizontal S-N Curve). I'd no answer, later I searched in Dieter but they had no reason for it. May I get some help?

@varaprasad6608

3 жыл бұрын

True endure limit can be observed for high strength materials not only for steels. Crystal structures plays an important role in determinning this. For the case of non ferrous metals like Aluminium or copper (which are soft ) true fatigue life is not observed. Presence of more than 5 independent slip systems allows easy gliding. That's why continuous decrease in life with stable crack propogation can be observed.

@anuragchakraborty8766

2 жыл бұрын

@@varaprasad6608 Please fix your spelling mistakes

Good Presentation!..But Take Care of the Signs in the equations(max and Min) which is negative?..

@jengerp

3 жыл бұрын

He did it right .it supposed to be that way.

Thanks sir

I wish my collage professor are also same as you. Atleast handwriting should be

Clarity from the root

🙏🙏

👍👍👍👍👍

Sir, can you please arrange a class on radiation effect on TDBT..

sir thank you sir, good video sir

sicklic loading?

Sir what should be the grain size to avoid high temperature fatigue ??

@patrickcurran5536

3 жыл бұрын

the larger the better, for example single crystals are used in a jet engine where both the temperature is very high and they undergo high cycle fatigue as they are often going from turned off to rotating at a high speed. fatigue mainly happens by defects moving to grain boundaries, so if there are less grain boundaries fatigue is reduced

@patrickcurran5536

3 жыл бұрын

^^ for the turbine blades

@ayay9835

3 жыл бұрын

@@patrickcurran5536 thanks for your answer. I just want to ask one more thing . Are these defects that you are referring to, induce crack initation at grain boundaries ?? And is thermal fatigue always cause intergranular failure ?

@patrickcurran5536

3 жыл бұрын

@@ayay9835 defects are things such as dislocations, stacking faults, twin grain boundaries, but the defects such as dislocations coming together is what induces crack initiations at grain boundaries. Dislocations are small holes in the crystal if you put many small holes together you get a big hole or a crack. thermal fatigue i'm not sure, could possibly be related to dislocations moving and somewhat related to creep, but i'm not too sure what thermal fatigue is

Very

me likey how indians pronounce "fatigueee"

Sir does it come total under fatique failure sir just confirm it

Thanks u very much sir.

Sir why stress amplitude is taken in S-N curve why not mean stress??

@rajeshprasadlectures

2 жыл бұрын

Fatigue inherently involves the cycling of stress, therefore the stress amplitude is important. what S-N curve shows is that the higher the stress amplitude (S) lower is the fatigue life (N). But the variation of stress amplitude is done at constant mean stress, usually zero. But, the mean stress does affect fatigue life. Increasing the mean stress decreases the fatigue life. But this aspect is not captured in the S-N curve which is drawn at constant mean stress.

What is no of cycle to failure

@rbhagyaraju5162

3 жыл бұрын

10^6 cycles

0:19

@introductiontomaterialsscience

4 жыл бұрын

?

@kakolisahoo4824

3 жыл бұрын

He probably refers to the fact how you pronounced shy-click loading as sick-lick loading !

ghanta bhi nhi smjhaya...isse 10x better book me diya h

@revivingfaith17

2 жыл бұрын

Han bhai mujhe bhi hindi me bataye to kuch samjh me aaye angrez ki aulaad

Slow teaching

@pranavmishra2868

5 жыл бұрын

Learning needs time

@pranavmishra2868

5 жыл бұрын

It's not a pill

@lakshaybansal2159

4 жыл бұрын

2X PE DEKH LE BHAI

There are a lots of video on KZread far better than this 😬

Generic cookie cutter explanation of fatigue basically offering no extra insight than what's available in your typical textbook