Design and Engineering Forum

Home
Engineering Forum Home
Engineering Design Data
Engineers Store


Forum Moderators: randykimball, Administrator | POSTING POLICY / RULES

shaft deflection
Post Reply   Forum
Posted by: vicky612 ®

08/30/2006, 02:12:50

Author Profile
eMail author
Edit

I am a student doing my bachelor and currently doing my final year project.It is a bearing test rig where load will be applied on a test bearing which placed on a stepped down shaft.there will be 4 bearings where 2 bearing in the middle will be apllied with load and the other 2 bearings at about 25-30mm from the side of each end of the shaft acts as a support for the shaft.can someone guide me to calculate the shaft deflection and give the formula which required to be used as im worried i will choose the wrong formula and the shaft will deflect too much and fail the test.thank you so much in advance and i looking forward for someone's guide.






Modified by Administrator at Fri, Sep 08, 2006, 19:50:59


Post Reply
Tell a Friend (must be logged in)
Alert Admin About Post
View All   | Next |

Replies to this message

Re: shaft deflection
Re: shaft deflection -- vicky612 Post Reply Top of thread Forum
Posted by: vicky612 ®

09/01/2006, 11:48:52

Author Profile
eMail author
Edit

I have uploaded a sketch of mine.i hope this would be helpful to guide me.please guide to how to calculate the deflection of the shaft.

 

1_sketch.jpg (39.4 KB)  






Post Reply
Tell a Friend (must be logged in)
Alert Admin About Post
Where am I? Original Top of thread
Re: shaft deflection
Re: shaft deflection -- vicky612 Post Reply Top of thread Forum
Posted by: Kelly Bramble ®

08/30/2006, 12:10:23

Author Profile
eMail author
Edit

A free-body load diagram would be helpfull.







Post Reply
Tell a Friend (must be logged in)
Alert Admin About Post
Where am I? Original Top of thread | |
Re: shaft deflection
Re: shaft deflection -- vicky612 Post Reply Top of thread Forum
Posted by: Scooter ®

08/30/2006, 11:56:54

Author Profile
eMail author
Edit

Where in respect to the horozontial shaft will the load be placed ? Will the load be concentrated ? If not, over what length will the uniformity be ???







Post Reply
Tell a Friend (must be logged in)
Alert Admin About Post
Where am I? Original Top of thread | |
Re: Re: shaft deflection Question
Re: Re: shaft deflection -- Scooter Post Reply Top of thread Forum
Posted by: vicky612 ®

08/31/2006, 11:25:04

Author Profile
eMail author
Edit

I have sketched and save it in word document.i hope that would give a better idea of the problem.I couldnt upload here as it says have some error,so i uploaded in different website.Please have a look and guide me with appropriate formula and steps of how to find the deflection and how to calculation where to place the bearing so that the deflection of the shaft will be minimum.
Here is the link.
####################
thank you for all the reply.

Admin: Links to that website are not allowed - please attach file here...







Modified by Administrator at Thu, Aug 31, 2006, 11:33:54


Post Reply
Tell a Friend (must be logged in)
Alert Admin About Post
Where am I? Original Top of thread | |
Re: Re: Re: shaft deflection
Re: Re: Re: shaft deflection -- vicky612 Post Reply Top of thread Forum
Posted by: zekeman ®

08/31/2006, 12:09:07

Author Profile
eMail author
Edit

Administrator,
It would be more helpful if you tell the poster how she can post her sketch. I'm sure this comes up a lot and would be useful to others as well







Post Reply
Tell a Friend (must be logged in)
Alert Admin About Post
Where am I? Original Top of thread
Re: shaft deflection
Re: shaft deflection -- vicky612 Post Reply Top of thread Forum
Posted by: zekeman ®

08/30/2006, 10:20:21

Author Profile
eMail author
Edit

The conservative way (giving the largest deflection) is to consider the end bearings simply supported and put a force in the middle. The more accurate way is to split the beam in the center yielding two symmetrical beams with 1/2 load guided at the split end and the opposite end built-in; this will yield a smaller value.
The actual value would be somewhere in between.







Post Reply
Tell a Friend (must be logged in)
Alert Admin About Post
Where am I? Original Top of thread | |

Powered by Engineers Edge

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