A car chassis will fail aging without use?

[SEBASTIANOFA]

Speaking of cars, in particular of the steel chassis, if we keep a car stopped for years, even a new car, will the weight of the engine and all the components form cracks in the crystalline microstructure of the steel?

 if we think about a spring, if we leave it compressed for so long it will lose its ability to flex, it will not come back as before (i guess), isn't it the same for a frame that has to hold up an engine for years? perhaps there is a load limit below which the piece will return as before also being compressed for many years? What happens to the metal microstructure in these cases? Correct me if I'm wrong. 

if the weight of the motor has been designed to keep the deformation of the underlying frame always in the "elastic" and not "plastic" range, how can it damage the metal in the absence of external environmental attacks?

thanks



 

[SEBASTIANOFA]

Thanks for the answers, is everything really interesting, now is a bit more clear

 

[EdStainless]

https://en.wikipedia.org/wiki/Iron_pillar_of_Delhi

Here you go, 6T and holding itself up for over 1600 years now.
At ambient temp things like stress relaxation and creep won't happen in any human time unless there was something very wrong with the starting microstructure or serious overloading.

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, Plymouth Tube

 

[SEBASTIANOFA]

this pillar is about 1600 years old, it's amazing how it survived, outside moreover.

 

[SEBASTIANOFA]

https://pdfs.semanticscholar.org/279c/54a84e26b3ddcb5aaa8c1bcb6817a9c54a87.pdf

I found this article and obviously there are many things I don't understand. could someone explain me what is said in the article? it seems to me to read that even at basic temperatures such as 20 and 40 degrees C, stress relaxation occurs but it’s not clear how long this happens and in what intensity

 

[SwinnyGG]

Again what that article is saying is much, much more complicated than the simple conclusion you're attempting to draw from it.

If you want to learn material science, you need to start at the 101 level. Trying to read and interpret PhD-level research papers on your own is only going to frustrate you, and you're not going to actually learn anything from that material until you study and learn the basics first.

 

[IRstuff]

Is this for work? What specific problem are you trying to solve?

Your arguments and articles are pointless and irrelevant; you can see with you own eyes that metal objects, in general, do not fail unless there are extenuating circumstance, PERIOD, END OF STATEMENT.

TTFN (ta ta for now)
I can do absolutely anything. I'm an expert!

https://www.youtube.com/watch?v=BKorP55Aqvg

faq731-376 forum1529 Entire Forum list

http://www.eng-tips.com/forumlist.cfm

 

Trying to read and interpret PhD-level research papers on your own is only going to frustrate you

No kidding. Especially since PhD is the new Masters.

"Everyone is entitled to their own opinions, but they are not entitled to their own facts."