Fatigue Test

Fatigue Test
- Problem and practical relevance
- Specimen preparation
- Test procedure
- S-N curve
- Practice
Responsible for this video: Prof. Dr.-Ing. Rainer Schwab, Hochschule Karlsruhe - University of Applied Sciences, Karlsruhe, Germany

[@MrChangCJ]

love seeing real life examples and actual testing instead of just theory and formulae in the text book! Thank you!

[@cale31032008]

Yo también.

[@Felipe-53]

What an awesome job we see here. Thank you very much indeed, I'm sure this video is impacting a lot of students like me. The world surely needs educators like you guys. Thanks a lot.

[@mertyigit4093]

the most explanatory video I have ever watched about fatigue, at least in basics! Thank you

[@faisalbashir4563]

We truly deserve educators like you, great video overall.

[@Akki420ish]

This is the best video I have seen on Fatigue testing. Good job.

[@oblivious3862]

That was informative af and well illustrated,, Thanks for the neat videos you provide. *much love*

[@AIFars]

I'm studying yes, but I'm REALLY enjoyed. Thank you very much for this effort.

[@rawipap9773]

Thank you! You just save my life from the mid semester test. : )

[@bhatsujatyousuf334]

The best ever tutorial video i had witnessed in past 10 years!! N

[@shaileshjangid1909]

way of explaining the each concept is epic .........thanks for this video

[@siddharthbenadi7966]

Best Explanation... 👏👌

[@shishirsingh3348]

awesome worth to watch

[@vikalpluthra5404]

Thank you for this explanatory video. This was very helpful to understand mechanical Fatigue in material.

[@karthikhs2569]

Excellent explanation of the concepts with practical scenario

[@sivathouta490]

That's really helpful in understanding the practical problem associated with Fatigue.

[@parikshitpadture4122]

Excellent video with a good balance of theory and practice

[@amolkumbhar1108]

Awesome video....good explanation.

[@bisisamosa2818]

Super video, neat explanation

[@alihassan1261]

very helpful video. i like your work keep it up.

[@pratikprajapati267]

Excellent ever...

[@venubarathan8391]

Impressed with technical content

[@hermeswilliansantiagoflore4988]

Really interesting!!!, congratulations and thank you...:)

[@susanpinal8899]

Easy to follow! & real life examples. Thank you

[@rumdonuts9111]

I love your videos! The stress machine sounds like what anxiety feels like.

[@ajidamodaran]

Thank you for sharing

[@nemod3338]

Your videos are so clean and informative, without childish emotions or facial expressions. Keep informing us. Thanks.

[@ericjohnvelasco422]

I am not sure if you want to be a good day at work now and then I will be there for you to be a u

[@ericjohnvelasco422]

))))))

[@ashishkumarsenapati662]

Hats off..very well explained.. thank you..👍👍👍

[@srt1312]

a perfectly and well defined demonstration for fatigue

[@kalsariyaajay7602]

Very nice video and perfect explained

[@samuelspencer5047]

thank you for such a great explanation of fatigue test

[@revanasiddappap635]

Very nicely explained with examples. Thanks

[@iamkeystroke]

Wow, that was a fascinating video.

[@mahmoudmuhammad7525]

Really your explaning Flow is great and showing the real life tests is really so helpful Thanks alot Keep Going

[@naviddavanikabir]

great video. I need to do this test on PEEK, a rigid plastic. the standard we follow is ASTM 7791. knowing only the ultimate stress and with limited number of specimen, how should I choose the stress/strain level to find the endurance limit and to waste as little specimen as possible?

[@user-re5ue1om2r]

awesome, thank you so much!

[@williamcechinguarienti2071]

Great video!

[@Satyaki266]

Wow ! What a Video. All the things cleared. Thank u.

[@ShivamVerma-gq2sm]

Thankyou so much for this tutorial.... very descriptive!!

[@ziyadalgaboby3767]

good job, thanx

[@jackdrdo]

Amazing video, by the real Life example understand very clearly and confidential 😃😃

[@rubasarkez9917]

very helpful

[@deepakdilip1414]

Dammit mate, why I didn't find this video early!! It literally helped me understand what I was looking for in the last two weeks!!

[@ace-rn3hn]

thank you , very helpful !

[@subirbiswas2831]

very impressive... thank you

[@aboammarabdulqadir6470]

good knowledge for students

[@saifalino]

Thank you, This was of great use!

[@88NA]

This is a very high quality video. I just subscribe to this channel.

[@chandanpatel989]

great videos ...full of concepts

[@mohammadmahdiahmadpour264]

perfect👌

[@Varunkumar-dd1tb]

Totally perfect t explain

[@rajeshprasad101]

very nice video. will use it for my class.

[@arma_6872]

Thanks for your explanation. 👍

[@shridharacharya134]

Well explained 🙏

[@randomgirl0707]

Great video thank you!

[@1dundermifflinfinity]

Very helpful. Thank you.

[@sinakeshavarz9839]

it was amazing. thanks for dis

[@-SanjaykumarM-gx4sz]

Very nice explanation

[@yasmeenhamdy53]

FANTASTIC VEDIO

[@mubashirhassan2772]

Good job... Please make more vedeos..

[@barryeastallen1638]

great video

[@rajeev_kumar]

Very good video

[@wajahata6481]

Very well explained..

[@hamedismail5703]

الف شكر وربنا يوفقكو

[@zichaowang5064]

Great job thanks

[@nilofarpathan665]

this is quite interesting!!!

[@lesedimantile3807]

I'm a first-year student at the University of PRETORIA doing Mechanical Engineering, trust me it was nice to watch this video as I will be working under these things.

[@MM-np4md]

Congratulations, I would've loved to be at your school but my application got rejected

[@05032885741]

thank you

[@sambenkamel]

great Video, thank you

[@apm2649]

Wow this is just awsm. I love fatigue test in real life

[@stickerhppy]

Do a video about XRF ;) Awesome channel! Subscribed!

[@taherbalasinorwala4751]

Can you please make a video on impact test and creep test.

[@yashwanthgoud7156]

awsme...

[@cemer1833]

I am doing a thesis.Can I learn the technical information of this test device?I would be most grateful if you would look into this matter as soon as possible

[@aronnilsson5343]

Excellent

[@blancaroca8786]

Obviously excellent job, so much better than cartoons or teacher memorized curves. Nice to see the result graph with statistical spread. Hopefully our critical car parts operate significantly under that! Just also wondering what happens using different frequencies for the loading. Is there some general trend?

[@MaterialsScience2000]

Answer to "Just also wondering what happens using different frequencies for the loading. Is there some general trend?" There is in principle little influence of the frequency of the load cycles for steel (and similar materials) at room temperature. Only the number of the load cycles matters. However, the frequency of the load cycles must not be too high, otherwise the specimen will heat up. It may be quite complicated at high temperatures.

[@tsshakthivel175]

Nice Demonstration

[@RYONPAK]

Best fatigue video ever

[@ai7229]

Do you have a report on the subject?

[@jessicajia6946]

That is so good

[@orcanmehmet]

Thanks for video

[@CADDIA]

thank you so much

[@chiluchise652]

Very helpful

[@abc7988able]

Nice video

[@lernfleissiger2096]

nice video, danke. I want to ask, can we use the specimen's shape in a flat (plate) form?

[@MaterialsScience2000]

Answer to "can we use the specimen's shape in a flat (plate) form?": Yes, the only trouble is the danger of buckling under compressive stresses. So thin plates should rather be tested within the tensile region.

[@lernfleissiger2096]

MaterialsScience2000 thanks sir for the suggestion. I am sorry to ask this, do you have some references about fatigue testing of Aluminium?

[@fahadimran4251]

science has not yet completely explained the complete mechanism of fatigue, the engineer must still design things that will not fail. In a sense this is a classic example of the true meaning of engineering as contrasted with science. Engineers use science to solve their problems if the science is available. But available or not, the problem must be solved, and whatever form the solution takes under these conditions is called engineering.

[@thehammurabichode7994]

Had to read it twice but I I got ya. Have a like, with lil peppercorns

[@mohankumarn1606]

Do videos about work hardening, precipitation hardening

[@salwaa.a574]

Thank you

[@Bade3zmanah]

very good

[@cesarescobar9679]

Did you fabricate the device to grip the specimens to tension and compression test? This fixturing is the best option for tension and compression test for cylindrical specimens? Thanks

[@MaterialsScience2000]

Answer to "Did you fabricate the device to grip the specimens to tension and compression test? This fixturing is the best option for tension and compression test for cylindrical specimens? Thanks" The grips in the machine (as shown in the video) were supplied by the manufacturer of the machine. This is a good method, but many other grip designs are used: hydraulic grips, threaded ends, ... Properly designed, all of them are good. Sorry for the late reply.

[@cesaresc8525]

Thank you for your reply, for the conditions of our equipment, threaded ends were not one possibility, for this reason, I used this video and designed grips for our machine. Thanks again

[@ACDroneDesignforPerformance]

Hi, could I use part of this video for my next video? It deals with the engineering of aircraft Panavia Tornado and I would give a short description of fatigue aspect. Thanks

[@MaterialsScience2000]

Answer to "Hi, could I use part of this video for my next video? It deals with the engineering of aircraft Panavia Tornado and I would give a short description of fatigue aspect. Thanks": Sorry, that's not allowed; we've had bad experiences. Good luck with your videos!

[@syahmizulkifli248]

Hi, thank you for this video. Can I know is this test considered under ASTM ?

[@MaterialsScience2000]

Answer to "Hi, thank you for this video. Can I know is this test considered under ASTM ?" Principally yes, but you have to check the details for testing in the appropriate ASTM standards.

[@DoctorSkyway]

Very interesting, props for mentioning the enormous scatter those tests produce. It would also be great if you could do a demonstration of a rotating beam test.

[@MaterialsScience2000]

Answer to "It would also be great if you could do a demonstration of a rotating beam test": We had a rotating beam test machine long ago, but we do not have it any more ... sorry.

[@rathansagi6827]

Firstly thank you for such interesting and wonderful video..: i have developed rotating bending fatigue test machine.. results are quite satisfactory..

[@LongNguyen-qn3qn]

I love your videos! how can i calculate the spring. i am very instered it

[@MaterialsScience2000]

Answer to "I love your videos! how can i calculate the spring. i am very instered it": The most important point is to choose an appropriate resonance frequency of the spring-mass system. The spring is designed so that the resonance frequency is slightly higher than the intended test frequency. The machine is operated subcritically (below the resonance frequency) in the test.

[@chandansahu004]

Videos are very good.. Please make it for other characterization technique of materials like FTIR ,RAMAN ,TGA DSC etc..

[@MaterialsScience2000]

Answer to "Videos are very good. Please make it for other characterization technique of materials like FTIR ,RAMAN ,TGA DSC etc..": We would like to do so, but we do not have the appropriate experience in this area.

[@hamceditz]

GREAT

[@Talhakhan-ov3wi]

Great

[@nikola176]

Hi, how can I determine power of electromotor which I need. I have a max force on sping and spring stroke. Thank you.

[@MaterialsScience2000]

Answer to "Hi, how can I determine power of electromotor which I need. I have a max force on sping and spring stroke. Thank you.": This is an important question that is not easy to answer. The electric drive only has to supply the power loss, i.e. the friction and the power absorbed internally. This is very little, in our machine the electric drive needs less than 200 W. One of the great advantages of this type of testing machine!

[@akashdileepgandhi7363]

Very nice description of the test including fracture surface analysis. My question is the failure is within gauge portion or outside the gauge portion. How to check the validity of the test. Akash from BARC Mumbai

[@MaterialsScience2000]

Answer to "Very nice description of the test including fracture surface analysis. My question is the failure is within gauge portion or outside the gauge portion. How to check the validity of the test.": In our fatigue test, we did not use a typical strain gauge, which is quite common in fatigue testing. Only in the so-called low-cycle fatigue testing are strain gauges used. In our tests, the fracture occurs within the cylindrical test region. I'm afraid validity testing is a long subject, far too long to explain here.

[@AkashSingh-oq4mp]

thanks :)

[@mavivatan9417]

I am a student in Material Science and Engineering. How can do internship in EU ? Which facilities do look for Material Engineers in EU. Ty all..

[@parasjain9416]

Dhanyawad