Close this search box.
Clear all

LLDPE 40lbs Air Cart Tank FEA

2 Posts
2 Users
0 Reactions
Posts: 1
Topic starter
New Member
Joined: 6 years ago

[FONT=Calibri, sans-serif]I am currently working a stress FEA model (linear analysis) for a 40lbs Air Cart Tank (height of the tank is 5 feet and thickens is 0.3125 inches). The material of this tank [FONT=Calibri, Helvetica, sans-serif]is LLDPE (Linear Low Density Polyethylene). The load applied is [/FONT]hydro static[FONT=Calibri, Helvetica, sans-serif] (fluid fertilizer)[/FONT].

I need to evaluate the stresses and deflections developed in this plastic tank. Upon running the simulation (NASTRAN IN CAD ) I got large displacements (for example, max displacement 10.76 inches).

The Von Misses stresses were much higher than the Yield Strength of this material.

I am wondering if you have any suggestions or comments on what [U][B]failure theory[/B][/U] I could use to determine the stress limits for this LLDPE material.[/FONT]

Best Regards,

Bogdan Chivulescu

Mechanical Engineer

Topic Tags
1 Reply
Posts: 3998
Joined: 5 years ago

I would use either a mises stress condition, or an effective strain that is dependent on the strain-rate and the stress triaxiality.


Topic Tags
1 Reply