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!

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

Search results for query: *

  • Users: Grill
  • Order by date
  1. Grill

    FEA analysis on Roto Moulded PE underground Rainwater Tanks

    P.S. Im fully aware of the joys of creep in PE!! It is the bane of my life. We use a reduced modulus approach which is extrapolated from a creep curve depending on the average stress teh product is seeing. I believe there is some method of simulating creep within Cosmos Works ADV Prof that i...
  2. Grill

    FEA analysis on Roto Moulded PE underground Rainwater Tanks

    Thanks for all the insight guys. I have done an example calc and posted it on here. Is this the right way to go? From further discussion my two loading conditons are as follows. (1) Concrete backfill with a high water table - I have to analyse the tank when it is being installed due to weight...
  3. Grill

    FEA analysis on Roto Moulded PE underground Rainwater Tanks

    Yeah i take on board what you are saying about the difference in height but im planning to do it in 100 mm increments as the tank will only be 1200 mm in diameter. The difference in the values should be minimal. I dont know how to scan and attach but it is Ph=Koyh Ko an K1 i cant type out...
  4. Grill

    FEA analysis on Roto Moulded PE underground Rainwater Tanks

    Hi All, Im just about to embark on designing some underground cylindrical rainwater tanks roto moulded using Polyethylene. The tanks will be backfilled with pea gravel. I have tried to do as much research as i can on loading of undeground tanks as this is a brand new area for me. I have...
  5. Grill

    Yield stress in PE

    I have ran a non linear analysis on a plastic rotomoulded tank where the tank is pressurised up to 0.3 bar for 30 mins. The tank is made out of polyethylene which we are assuming has a yield stress of 17 Mpa. The analysis is telling me that one section of the tank will see a stress of 20 Mpa...
  6. Grill

    Exceeded yield stress

    I have ran a non linear analysis on a plastic rotomoulded tank where the tank is pressurised up to 0.3 bar for 30 mins. The tank is made out of polyethylene which we are assuming has a yield stress of 17 Mpa. The analysis is telling me that one section of the tank will see a stress of 20 Mpa...
  7. Grill

    FEA in Rotational Moulding

    I am about to embark on using FEA (Cosmos works) with Rotational Moulded Products i.e Oil tanks, fuel tanks,large hollow objects made out of Polyethylene. I am only concentrating on linear analysis using long term creep data. Anyone know any useful links/books specific to roto moulding to help...
  8. Grill

    FEA software

    (I have posted this question 3 times as visitor and no response so i decided to join the bloody thing to try and get an answer) Currently using solidworks and about to purchase FEA software. I design Roto moulded products using plastic and have been advised to purchase non-linear analysis...

Part and Inventory Search

Back
Top