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| Advantages and disadvantages of thermal stresses in engineering applications | |||
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| Posted by: aytamal ® 01/10/2011, 16:01:07 Author Profile eMail author Edit |
Hi friends.
I want to have information about advantages and disadvantages of thermal stresses in engineering applications. please help me. Thanks alot. |
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| : Advantages and disadvantages of thermal stresses in engineering applications | |||
| : Advantages and disadvantages of thermal stresses in engineering applications -- aytamal | Post Reply | Top of thread | Engineering Forum |
| Posted by: rwolfejr ® 01/10/2011, 16:35:54 Author Profile eMail author Edit |
Sounds like homework...?
If this is indeed homework, your suggested textbook probably has examples of both the positive and negative effects thermally created stresses can have on some different applications. |
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| Posted by: aytamal ® 01/12/2011, 09:18:19 Author Profile eMail author Edit |
Whick textbook are you talking about? Yes this is my homework. The problem is, i coudn't find any sources that has clear information about my specific sublect..:( |
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| Posted by: Pinkerton ® 01/12/2011, 09:55:56 Author Profile eMail author Edit |
It is extremely rare (and pointless) for homework to request information on a subject that has not first been covered in some form in the preceding course materials. Sleeping in class that day?
If you are working as an Engineer, who are you going to ask if the Chief Engineer was to ask you that question? You have to know this stuff. Dave |
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| Posted by: dalecyr ® 01/13/2011, 14:05:33 Author Profile eMail author Edit |
Ok, now *I* am curious... Maybe the original poster can enlighten me,
what is an example of an advantage of thermal stress?
dale |
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| Posted by: dalecyr ® 01/13/2011, 14:09:21 Author Profile eMail author Edit |
In thinking about this a bit more... Is the typical thermostat an example of using thermal stress
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| Posted by: Pinkerton ® 01/13/2011, 14:15:41 Author Profile eMail author Edit |
>> In thinking about this a bit more... Good to see Dale, I think you gave up to "obtuse" too quickly with the lock washers thread. Everything in Engineering is logical. One needs to spend the time thinking it through to understand each specific element. Please explain why you opine that a thermostat may be an example. Where is the stress? Dave
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| Posted by: dalecyr ® 01/13/2011, 16:12:05 Author Profile eMail author Edit |
Not that I know much about thermostats,
but I think the "working" part is composed of two differant metals, bonded together to form a bimetal "bar". Each metal expands /contracts at a differant rate
the bimetal bar bends one way or the other,
the stress then, is in the side that...
the stress is in BOTH sides of the bimetal bar.
right?
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| Posted by: Pinkerton ® 01/13/2011, 17:32:11 Author Profile eMail author Edit |
Dale, Cigar in the mail. Both parts are being stressed as you describe and the result is deformation, but in this instance good deformation. And -- then there is Nitinol wire. Dave |
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| Posted by: dalecyr ® 01/13/2011, 22:46:56 Author Profile eMail author Edit |
(satisfied grin) Ah, good.
And I just ran out of Opus X A. I can hardly wait.
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| Posted by: jboggs ® 01/13/2011, 16:41:01 Author Profile eMail author Edit |
At the risk of doing the homework for the original poster - another example I've seen is so-called "thermal connections" where a pin is inserted into a hole while the two parts are at different temperatures (either heat the plate or cool the pin) and as the two parts assume the same temperature the expansion of the pin (or contraction of the hole) creates a VERY tight joint. And I think we've all seen bearing race heaters in maintenance shops. |
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| Posted by: CCR5600Design ® 01/16/2011, 10:49:49 Author Profile eMail author Edit |
This is why I like this place. You folks encourage people to think. Ron |
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| Posted by: Pinkerton ® 01/17/2011, 09:37:08 Author Profile eMail author Edit |
Hi Ron, Don't get me started on the "think" thing. We are never taught how to think, just taught think about how to do something then ask someone else if we can't work it out. Thinking is a skill that can be developed and expanded enormously, but I guess consensus dictates it is better if every one is at the level of the lowest common denominator. Ooops, getting myself started there.
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