Eng-Tips is the largest forum for Engineering Professionals on the Internet.

Members share and learn making Eng-Tips Forums the best source of engineering information on the Internet!

  • Congratulations dmapguru on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

NX 11.0: Wrong beam deflection results

Status
Not open for further replies.

thakurai

Mechanical
Joined
Oct 11, 2017
Messages
14
Location
US
Hi,
I am doing a simple problem of a beam fixed at both ends and carrying a uniform distribiuted load, material is steel. The results given by NX are different from the results I get using beam deflection formulas (Theoretical).
In attachments I have attached the beam problem, Beam theory formulas used to calculate deflection and results given by NX.
Since the Moment of Inertia, Modulus of Elasticity values are taken as given by NX itself, and also values of load and beam dimensions are displayed by NX itself , it does not make much sense why both the results are different.
Deflection (Y) given by beam theory is : 1.350E-5 mm and by NX is 2.286E-5 mm which is an error of 69 %.
Whereas the results for Bending stress is coming exactly same from both theory formulas and NX. Can anybody explain why am I getting theses kind of results.
Thanks,
Ashwani Thakur.
 
 http://files.engineering.com/getfile.aspx?folder=9a7e96fd-deaf-41be-8465-1246f4658c47&file=NX11.0_Beam_deflection.PNG
Status
Not open for further replies.

Part and Inventory Search

Sponsor

Back
Top