Midrange and Alternating Stress | Goodman Criteria | Axial Fatigue Load
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Күн бұрынLECTURE 23:
Here the concept of expressing fluctuating stresses in terms of midrange and alternating components is presented and explained. The Goodman failure criteria is presented as a simple technique of estimating the stress thresholds at which the life of parts can no longer be expected to be infinite. An example problem is completed in which an axially loaded connecting rod with a pin-in-hole stress concentration is evaluated for a fatigue factor of safety using the Goodman criteria for infinite life. Marin factors are used to estimate the fully corrected endurance limit. The factor of safety guarding against first-cycle yielding is also evaluated. The load line is plotted on midrange-alternating stress axes along with the Goodman and Langer failure lines. The factors of safety found are inspected relative to the graphical representation.
Playlist for MEEN361 (Advanced Mechanics of Materials):
• MEEN 361: Advanced Mec...
Playlist for MEEN462 (Machine Element Design):
• MEEN 462: Machine Elem...
This lecture was presented on February 5, 2018. All retainable rights are claimed by Michael Swanbom.
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Thank you for your support!
@facha1747 3 жыл бұрын
You explain much better than my professor. Thank You!
@TheBomPE 3 жыл бұрын
I'm glad I could help! Here is a playlist of the lectures from that course, in case it is of interest: MEEN 361: Advanced Mechanics of Materials: kzfaq.info/sun/PL1IHA35xY5H5AJpRrM2lkF7Qu2WnbQLvS All the best to you!
@tomshaffer5564 5 жыл бұрын
You're channel is simply amazing. I have a professor who is not very inspiring and I have to say your use of examples and explanation of theory is great. Thank you so much, I will make sure to tell any of my friends struggling with machine design to check you out. Best of luck growing in the future!!
@TheBomPE 5 жыл бұрын
Thank you so much for the positive review! I'm glad you found it helpful!
@narveful 3 жыл бұрын
Love your method of teaching! Explanations are so clear, and a great example where you applied all the information you previous taught!
@TheBomPE 3 жыл бұрын
I'm glad you like it! I appreciate your viewership!
@muhammadzaini5728 2 жыл бұрын
🤭
@jeffersonap386 3 жыл бұрын
Your class was excellent! You explain it in a way that is really easy to understand. Thanks!!
@TheBomPE 3 жыл бұрын
I'm glad I could help! Here is a playlist of other lectures I give in that course in case you are interested: MEEN 361: Advanced Mechanics of Materials: kzfaq.info/sun/PL1IHA35xY5H5AJpRrM2lkF7Qu2WnbQLvS Thanks for watching!
@PALakshminarayanan 5 жыл бұрын
I am addicted to your lectures!
@TheBomPE 5 жыл бұрын
I suppose I have heard of worse things to be addicted to. :) I'm glad you are enjoying them!
@minhkieu3412 2 жыл бұрын
The lecture is very good, the lecturing way of Mr. professor even better. this is excellent performance and easy to understand. Thank you very much Mr Professor !
@juansebastianpintodelgado6976 4 жыл бұрын
Its marvellous content, the way you explain. Tank you very much for sharing this content ! Greetings from Colombia.
@TheBomPE 4 жыл бұрын
Thanks for the positive review! I'm glad you are finding my videos useful! Thanks for watching!
@llomax9642 3 жыл бұрын
I finally understood Goodman diagram. Thank you so much!
@TheBomPE 3 жыл бұрын
Glad it helped! Thanks for watching!
@PALakshminarayanan 5 жыл бұрын
Excellent, Thank you for the lecture.
@TheBomPE 5 жыл бұрын
I'm glad you found it helpful! Thanks for watching!
@martinjamer274 3 жыл бұрын
I will use this for my students. I will add some practical examples. Very good explanation. In my experience, students need some time and many examples of use to understand this diagram. Thanks, very helpful.
@TheBomPE 3 жыл бұрын
I'm glad it looks like it will be useful! Thanks for the review!
@shrikantzunjare1771 2 жыл бұрын
Wow amazing explaining about fatigue and cyclic loading , i have seen best ever video which is explain deeply about fatigue
@facha1747 3 жыл бұрын
I undertand this topic thanks to this video!
@berkluleci3172 2 жыл бұрын
I wish I could be attending you classes! It really helped me to build a foundation on the topic, thank you :)
@TheBomPE 2 жыл бұрын
Glad it was helpful!
@evelyncropper9560 3 жыл бұрын
Clear and very well done. Thank you
@TheBomPE 3 жыл бұрын
Thank you! I'm glad you liked it!
@UmarSaeed1 2 жыл бұрын
Life saving content, the things which I am unable to understand before now I can understand them easily 😍
@TheBomPE 2 жыл бұрын
I'm glad I could help! Thanks for watching!
@EGDKEGD 5 жыл бұрын
This is very much appreciated and helped out a ton. Wish I had you as a professor. Will definitely pass this on. (PS the first cycle yield equation your looking for is (6-49) =)
@TheBomPE 5 жыл бұрын
Come to Louisiana Tech, I'll be your professor :) Good call on the yield equation!
@paulromano5137 4 жыл бұрын
Very helpful explanation, thank you.
@TheBomPE 4 жыл бұрын
I'm glad it helped! Check out my other Shigley- based content if you are interested. It is collected into these two playlists: MEEN361: kzfaq.info/sun/PL1IHA35xY5H5AJpRrM2lkF7Qu2WnbQLvS and MEEN462: kzfaq.info/sun/PL1IHA35xY5H5KqySx6n09jaJLUukbvJvB Thanks for watching!
@Yndiax 4 жыл бұрын
Very good, Thanks for sharing I understood it
@TheBomPE 4 жыл бұрын
I'm glad you found it clear and useful! In case you haven't found them yet, you might be interested in some of my other content, organized in the following playlists: NGR122 (Statics & Engr Econ Intros): kzfaq.info/sun/PL1IHA35xY5H52IKu6TVfFW-BDqAt_aZyg ENGR220 (Statics & Mech of Mat): kzfaq.info/sun/PL1IHA35xY5H5sjfjibqn_XFFxk3-pFiaX MEMT203 (Dynamics): kzfaq.info/sun/PL1IHA35xY5H6G64khh8fcNkjVJDGMqrHo MEEN361 (Adv. Mech of Mat): kzfaq.info/sun/PL1IHA35xY5H5AJpRrM2lkF7Qu2WnbQLvS MEEN462 (Machine Design): kzfaq.info/sun/PL1IHA35xY5H5KqySx6n09jaJLUukbvJvB (MEEN 361 & 462 are taught from Shigley's Mechanical Engineering Design) Thanks for watching!
@pommuduraikumarp6957 4 жыл бұрын
Thank you very much for your lecture.
@TheBomPE 4 жыл бұрын
I'm glad you found it useful! Here are some of my other playlists in case you haven't seen them yet and might be interested: ENGR122 (Statics & Engr Econ Intros): kzfaq.info/sun/PL1IHA35xY5H52IKu6TVfFW-BDqAt_aZyg ENGR220 (Statics & Mech of Mat): kzfaq.info/sun/PL1IHA35xY5H5sjfjibqn_XFFxk3-pFiaX MEMT203 (Dynamics): kzfaq.info/sun/PL1IHA35xY5H6G64khh8fcNkjVJDGMqrHo MEEN361 (Adv. Mech of Mat): kzfaq.info/sun/PL1IHA35xY5H5AJpRrM2lkF7Qu2WnbQLvS MEEN462 (Machine Design): kzfaq.info/sun/PL1IHA35xY5H5KqySx6n09jaJLUukbvJvB (MEEN 361 & 462 are taught from Shigley's Mechanical Engineering Design) Thanks for watching!
@mstfylqz1947 7 ай бұрын
thank you
@AdityaTiwari-tu1bl 4 жыл бұрын
good explanation, in my university my prof. just finished this topic in 30 mins
@TheBomPE 4 жыл бұрын
I'm glad it was helpful! In case you might be interested in my other content, I have it organized into these playlists: ENGR122 (Statics & Engr Econ Intros): kzfaq.info/sun/PL1IHA35xY5H52IKu6TVfFW-BDqAt_aZyg ENGR220 (Statics & Mech of Mat): kzfaq.info/sun/PL1IHA35xY5H5sjfjibqn_XFFxk3-pFiaX MEMT203 (Dynamics): kzfaq.info/sun/PL1IHA35xY5H6G64khh8fcNkjVJDGMqrHo MEEN361 (Adv. Mech of Mat): kzfaq.info/sun/PL1IHA35xY5H5AJpRrM2lkF7Qu2WnbQLvS MEEN462 (Machine Design): kzfaq.info/sun/PL1IHA35xY5H5KqySx6n09jaJLUukbvJvB (MEEN 361 & 462 are taught from Shigley's Mechanical Engineering Design) Thanks for watching!
@chestiii123 4 жыл бұрын
our prof. talked for like 5 minutes and than went on to the next topic.... welcome to the german way of engineering xD
@michaelswanbom6023 6 жыл бұрын
If you found this video useful, consider helping me upgrade the old tablet PC I use to create these videos! Thanks! www.gofundme.com/help-replace-my-2011-tablet-pc
@javadrahimi6410 2 жыл бұрын
Perfect
@TheBomPE 2 жыл бұрын
Glad you liked it!
@SeracS354 4 жыл бұрын
Thank you for the great lectures. Is there a limit when the stress is applied so suddenly that it should be treated as an impact instead and is impact covered another lectures?
@minghuifang407 4 жыл бұрын
Really great explanation. One of the best if not the best! Any lectures on Failure modes (Bolted joints and Threaded fasteners), Elastic instability (Buckling of columns), Pressurised cylinders (pressure vessels, compound cylinders) just wondering?? You have this way of teaching that makes this subject looks more interesting to the viewers and want to know more. Pretty sure there is this sentence in every comment "I wish I had you as a lecturer." Excellent and wonderful job
@TheBomPE 4 жыл бұрын
You are very kind! Thanks for the positive review! I do have videos that address most of those topics. (I don't have a buckling lecture recorded, but I plan to very soon.) Stay tuned, I'll post some links.
@TheBomPE 4 жыл бұрын
kzfaq.info/get/bejne/orKHnKh83K26np8.html
@TheBomPE 4 жыл бұрын
kzfaq.info/get/bejne/sLxlprF4mc7HdWg.html
@TheBomPE 4 жыл бұрын
kzfaq.info/get/bejne/q9SBmaRmy6-9g3k.html
@moeinchelengari7214 5 жыл бұрын
Thanks alot. Really useful
@TheBomPE 5 жыл бұрын
I'm glad I could help! You might also be interested in my other course I teach out of the Shigley text: kzfaq.info/sun/PL1IHA35xY5H5KqySx6n09jaJLUukbvJvB Thanks for watching!
@moeinchelengari7214 5 жыл бұрын
@@TheBomPE I will watch them for sure
@mohamedesmael5428 3 жыл бұрын
good explanation thank you❤️❤️
@TheBomPE 3 жыл бұрын
I'm glad you liked it! Thanks for watching!
@justinlewis6093 4 жыл бұрын
this lecture was the bom
@TheBomPE 4 жыл бұрын
Thanks! I'm glad you enjoyed it! I'll see you this afternoon!
@keshavmurthy2844 2 жыл бұрын
Hi, what are the practical sources of fatigue loads in rotor components. I'm assuming unbalance during rotation could be one of the source of HCF. Likewise, what could be the source for LCF?? Thanks in advance.
@user-zo8go8mt7t Жыл бұрын
How can we draw the load line on fatigue strength diagram?thanks
@lengockhanh4018 4 жыл бұрын
hello sir ! i have a question if in case d/w= 0.1 and h/w = 0.5 when value of Kt how much ? thank you
@Conoroneill420 4 жыл бұрын
Hi Professor I have a question. When the midrange value (σm) is not given to us, how can we determine the min & max limit stress values from the Smith Goodman diagram?
@rafaelrodriguesfortes3001 3 жыл бұрын
Which book are you using as reference?
@cogitateandabet 3 жыл бұрын
Professor, I have some problems and misunderstanding. (For infinite life)In case of fully reversing load, sigma max and sigma a is within endurance limit. When the load is repeated in nature, sigma max can go beyond Se(up to Sy)and sigma a should be within Se? Why should sigma a decrease, when sigma m increases in magnitude?
@cubanolibre1033 Жыл бұрын
Could anyone tell me what text book does he use?
@TheBomPE Жыл бұрын
I teach this course out of Shigley's Mechanical Engineering Design, 10th ed. Thanks for watching!
@miamisasquatch Жыл бұрын
Shigley's 😍😍😍 THE book
@AdityaTiwari-tu1bl 4 жыл бұрын
Sir i am interested in this field of mechanical engineering, what more i could do in this field ?
@TheBomPE 4 жыл бұрын
I am a mechanical engineer, so many of my videos have that kind of a flavor. There are many career fields open to mechanical engineers because it features a very broad base of study. Are you asking for video suggestions, or are you looking more for career advice?
@zorkan111 6 жыл бұрын
39:10 "We want to take the portion of it where the area is minimum". Doesn't the stress concentration factor already take into account the fact that there's a hole there? Shouldn't you then just plug in the nominal area of the rod, instead of the area lessened by the hole diameter?
@TheBomPE 6 жыл бұрын
No, you want to use the reduced area at the hole. The stress concentration factor accounts for localized increase in stress caused by the discontinuity in the continuum of the material (the hole). It does not account for the reduction in area due to the presence of the hole. You have to do that as I show in the example.
@zorkan111 6 жыл бұрын
OK. Thanks for the reply. Also, thanks for the well delivered, easy to understand lecture :)
@TheBomPE 6 жыл бұрын
My pleasure! I'm trying to grow my channel, so please spread the word! :)
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