Pietatura

[jackal1134]

Hello.

I am a mechanical engineering student, these days I am studying for the examination of mechanical technology. for now having read in depth the theory, I can not perform the exam exercises.
I have annexed some questions that have been asked to explain where I go in total paranoia.
I hope someone can give me useful elements to be able to understand how to do these questions.

Thank you in advance for availability



p.s. if someone can recommend me a better text than those I have (they are made of micari) is well accepted.

 

[meccanicamg]

I would say that on university books well made there are all information to solve these problems since in the end we talk about bending force and curves of deformation of materials.
I don't remember what it's called the book I used at the time but it was written with the typewriter and still now there are in university dispensers the strawberries with the explanation drawings. ...it was done very well and it seems to me that someone on the forum mentioned it

 

[jackal1134]

thank you for the answer and for the help.... now I will look for this dispensation... .
Unfortunately, on the books that I have I cannot understand how to do these kinds of exercises, because it alone gives me the general formulas.
like for example I do not know when the rmax can be zero, and what material you need to use to have this value.

Thanks again for the answer

 

[jackal1134]

Unfortunately I couldn't find the dispenses you recommended to me, and so I tried to do these questions... but there's something I don't explain.
knowing that the formula of the bending force brings me a factor that varies according to the type of bending, trying to insert the value of 1 to this factor comes out a force in both cases greater than the 150 n provided by the track. In this case, how do I behave?

n.b. I did the question that is in the third image