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!

Axial pulling test

Status
Not open for further replies.

Ingife

Civil/Environmental
Joined
Mar 31, 2015
Messages
4
Location
GR
Hello everybody,

I'm modelling an axial pulling test i.e. longitudinal soil pipe interaction. I'm using:

- C3D8 elements for the sand
- S4 elements for the pipe
- Mohr coulomb constitutive model

While I was doing a sensitivity analysis varying some soil parameters I noticed that the model is not `perfect`. If I increase the friction angle from 40 degrees to 45 degrees the soil reaction force measured during the axial pulling decrease. Obviously if the friction angle increase the soil reaction must increase. From .odb file it is evident an increase of stress around the pipe much higher in the case 40 degrees respect to the case 45 degrees. At the same manner if I increase the dilation angle over 10 degrees the reaction force start to decrease.

Any suggestion?

Thank you for your time


 
 http://files.engineering.com/getfile.aspx?folder=e99f65b1-6cf1-4ac6-9047-13935d8ccb07&file=pulling.png
Status
Not open for further replies.

Part and Inventory Search

Sponsor

Back
Top