Fatigue Test
ฝัง
- เผยแพร่เมื่อ 14 ต.ค. 2014
- 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 - วิทยาศาสตร์และเทคโนโลยี
love seeing real life examples and actual testing instead of just theory and formulae in the text book! Thank you!
Yo también.
the most explanatory video I have ever watched about fatigue, at least in basics! Thank you
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.
This is the best video I have seen on Fatigue testing. Good job.
I'm studying yes, but I'm REALLY enjoyed. Thank you very much for this effort.
That was informative af and well illustrated,,
Thanks for the neat videos you provide.
*much love*
We truly deserve educators like you, great video overall.
The best ever tutorial video i had witnessed in past 10 years!! N
Thank you! You just save my life from the mid semester test. : )
Thank you for this explanatory video. This was very helpful to understand mechanical Fatigue in material.
way of explaining the each concept is epic .........thanks for this video
That's really helpful in understanding the practical problem associated with Fatigue.
Your videos are so clean and informative, without childish emotions or facial expressions. Keep informing us. Thanks.
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
))))))
I love your videos! The stress machine sounds like what anxiety feels like.
Excellent video with a good balance of theory and practice
Really interesting!!!, congratulations and thank you...:)
Easy to follow! & real life examples. Thank you
Wow ! What a Video. All the things cleared. Thank u.
Really your explaning Flow is great and showing the real life tests is really so helpful Thanks alot Keep Going
a perfectly and well defined demonstration for fatigue
Best Explanation...
👏👌
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.
Congratulations, I would've loved to be at your school but my application got rejected
Excellent explanation of the concepts with practical scenario
Awesome video....good explanation.
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!!
Hats off..very well explained.. thank you..👍👍👍
Very nicely explained with examples. Thanks
awesome
worth to watch
Amazing video, by the real Life example understand very clearly and confidential 😃😃
very helpful video. i like your work keep it up.
Thankyou so much for this tutorial.... very descriptive!!
Wow, that was a fascinating video.
Excellent ever...
thank you for such a great explanation of fatigue test
Super video, neat explanation
Impressed with technical content
Very nice video and perfect explained
Great video!
This is a very high quality video.
I just subscribe to this channel.
awesome, thank you so much!
Thank you, This was of great use!
great videos ...full of concepts
very impressive... thank you
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?
good job, thanx
very nice video. will use it for my class.
thank you , very helpful !
Wow this is just awsm. I love fatigue test in real life
Great video thank you!
Thanks for your explanation. 👍
FANTASTIC VEDIO
great Video, thank you
Do a video about XRF ;) Awesome channel! Subscribed!
good knowledge for students
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?
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.
very helpful
Good job... Please make more vedeos..
great video
Very nice explanation
Great job thanks
it was amazing. thanks for dis
Very well explained..
Very helpful. Thank you.
Best fatigue video ever
Do you have a report on the subject?
this is quite interesting!!!
الف شكر وربنا يوفقكو
Well explained 🙏
Totally perfect t explain
Very good video
awsme...
thank you
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.
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.
Firstly thank you for such interesting and wonderful video..: i have developed rotating bending fatigue test machine.. results are quite satisfactory..
Thank you for sharing
That is so good
Videos are very good..
Please make it for other characterization technique of materials like FTIR ,RAMAN ,TGA DSC etc..
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.
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
Can you please make a video on impact test and creep test.
perfect👌
Thanks for video
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
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!
Nice Demonstration
Excellent
thank you so much
Nice video
Very helpful
GREAT
Do videos about work hardening, precipitation hardening
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
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.
Hi, thank you for this video. Can I know is this test considered under ASTM ?
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.
thanks :)
nice video, danke.
I want to ask, can we use the specimen's shape in a flat (plate) form?
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.
MaterialsScience2000 thanks sir for the suggestion. I am sorry to ask this, do you have some references about fatigue testing of Aluminium?
Thank you
finally i understand it , books are not able to show this.
Great
I love your videos! how can i calculate the spring. i am very instered it
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.
very good
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
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.
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
Thank you very much for explaining this topic :)
Can you please tell me the make of machine. I am interested in procuring this. Also I have doubt, how did you maintain the constant load and displacement.
Answer to "Can you please tell me the make of machine. I am interested in procuring this. Also I have doubt, how did you maintain the constant load and displacement." The machine is an old testing machine that has been completely refurbished and equipped with a computer control by ourselves. There are some similar machines refurbished by commercial companies on the market. The constant load is maintained by computerized automatic control via measuring the force and adjusting the force by altering the speed of the spindle with the rotating mass.
great