Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

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

Applying Gravity in FEA

Status
Not open for further replies.

mj345

Mechanical
Joined
Jan 9, 2019
Messages
82
Location
US
Hello All,

Could anybody explains me the application of Gravity load in FEA,
when can I need to apply or not?
Appreciate all your time and help.

Thanks,
 
The rule is actually pretty straightforward. If applied loads are much higher than gravity load then gravity can be ignored in the simulation. In other case you should include it. However a good practice is to always apply gravity load in case of large structures. Especially that its application in FEA programs is very simple and it shouldn’t cause any problems with convergence or increased computational cost.
 
Is the gravity applied in terms of acceleration? I have an airframe and one of the conditions involves a vertical acceleration of 2.25 g. Do I have to apply 2.25 the acceleration for GRAVITY?

Also, every material has its density defines. Do I have to define the weight of the structure of it's implicit?
 
You can apply 2.25g using gravity load. Just multiply gravitational acceleration by 2.25 and enter the value in the appropriate Component term (depending on the orientation of coordinate system). When you define gravity load and specify material density then there's no need to input mass directly since Abaqus will calculate it using volume and density.
 
Status
Not open for further replies.

Part and Inventory Search

Sponsor

Back
Top