a can crusher
Post Reply   Forum
Posted by: ex03134 ®

11/26/2005, 09:37:32
Author Profile Mail author Edit
i am investigating the effects of a can being crushed not from the top but from the side of a can. I calculated the force using by calculating the 2nd moment of area for a hollow cylinder using the equation I=pi*R^3*t
I-2nd moment of area
R-external radius
t-wall of thickness
Then i calculated the bending moment using
tensile stress = My/I
M-bending moment
y-distance from neutral axis
and from that calculated the force using
F=4M/L
where L is the distance between the two reaction forces acting up from the can supports. However i got an extremely large value for force. I realised this was because i assumed that it was a simply supported beam.but in reality the top side of the can bends independtly of the bottom.
I was wondering if there was an alternative method to calculating the force to be a much smaller one.
Can anyone help me?






Post Reply | Recommend | Alert View All   | Next |

Replies to this message


Re: a can crusher
Re: a can crusher -- ex03134 Post Reply Top of thread Forum
Posted by: devitg ®
Bart
11/27/2005, 18:13:01
Author Profile Mail author Edit
here is my prior post
/engineering-forum/forum.php/?cmd=get&cG=43836313&zu=33383434&v=2&gV=0&p=#4861






Post Reply | Recommend | Alert Where am I? Original Top of thread
Re: a can crusher
Re: a can crusher -- ex03134 Post Reply Top of thread Forum
Posted by: devitg ®
Bart
11/27/2005, 18:11:45
Author Profile Mail author Edit
As in my other post, where you post too
It far from bending or flexing
It is near BUCKLING .
I supposs that if you want to crush it , it will be do between two plates.
A can have a great diameter to thicknes ratio and it will be buckled before bend.







Post Reply | Recommend | Alert Where am I? Original Top of thread | |
Re: a can crusher
Re: Re: a can crusher -- devitg Post Reply Top of thread Forum
Posted by: ex03134 ®

11/29/2005, 12:27:32
Author Profile Mail author Edit
thank you for your reply. so if the can is buckling, is there an alternative way of calculating the force for it to buckle?...sorry if im bothering you..






Post Reply | Recommend | Alert Where am I? Original Top of thread | |
Re: a can crusher
Re: Re: a can crusher -- ex03134 Post Reply Top of thread Forum
Posted by: devitg ®
Bart
11/29/2005, 16:27:44
Author Profile Mail author Edit
Hi, As far as I know , that kind of form ,the can , fall off calculus, a small.
All you need is a small force to make a deformation on one side and the the can will colapse .
As I told you , do a try and error test.






Post Reply | Recommend | Alert Where am I? Original Top of thread

Powered by Engineers Edge

© Copyright 2000 - 2024, by Engineers Edge, LLC All rights reserved.  Disclaimer