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  1. #41
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    Default Re: The marvel of modern CAD

    Quote Originally Posted by faniedup View Post
    I also use Inventor Pro, as the total path from solid modeling, Nastran FEM, CAM to CNC machine works really great and the yearly subscription is kinder to the budget than paying for all of that in a once off payment for Solidworks and its modules.
    Just for interest sake, what are you running on Nastran that you canít get from Stress Analysis. We use both, but for different problems. Interested to hear your take. From what I remember you are involved in die cast wheels, or am I confused?

  2. #42
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    Default Re: The marvel of modern CAD

    They must have full full package including Nastran. All add on packages in these 3D modelling programs are limited. They do reasonable job but cannot do for instance thermal analysis. I design items where limited scope FEA is OK most of the time but not for high end types like FCCU units. Basic difference is the temperature. We are looking now something where the fluid temperature is well over 1600 C Cannot do the full design on limited scope FEA.

    Unfortunately that full full package cost more than arm and a leg.

    Quote Originally Posted by BruceB View Post
    Just for interest sake, what are you running on Nastran that you canít get from Stress Analysis. We use both, but for different problems. Interested to hear your take. From what I remember you are involved in die cast wheels, or am I confused?
    Jouko
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    2003 Grand Cherokee 4.7l
    2012 Smart
    Never drive a normal car 8)

  3. #43
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    Default Re: The marvel of modern CAD

    Quote Originally Posted by ViperR View Post
    Fusion is free for the basic DIY'er. Some limitations but nothing you can't do without.
    Hasnt this changed?

  4. #44
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    Default Re: The marvel of modern CAD

    Quote Originally Posted by plunger View Post
    Hasnt this changed?
    They have tightened the belt and limited what a person can do, but I think it's still the best option out there for the average Joe.
    GaryG


    Honda Civic Type R
    - Daily Drive
    Isuzu KB 250 Xrider - Swambo
    Grand Cherokee WK2 Hemi - Sold
    4.0 XJ Jeep Cherokee - Sold

  5. #45
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    Thumbs up Re: CAD bumper design

    Uys do you have drawings for Discovery 2 bumpers? willing to pay a fee. Thanks Mike 0824473699

  6. #46
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    Default Re: CAD bumper design

    Quote Originally Posted by mike cullen View Post
    Uys do you have drawings for Discovery 2 bumpers? willing to pay a fee. Thanks Mike 0824473699

    No I do not have any.
    Everything is a hammer.
    Unless it is a screw driver.

    Then it it a chisel.

    083 399 2046

  7. #47
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    Default Re: The marvel of modern CAD

    Quote Originally Posted by Jouko View Post
    They must have full full package including Nastran. All add on packages in these 3D modelling programs are limited. They do reasonable job but cannot do for instance thermal analysis. I design items where limited scope FEA is OK most of the time but not for high end types like FCCU units. Basic difference is the temperature. We are looking now something where the fluid temperature is well over 1600 C Cannot do the full design on limited scope FEA.

    Unfortunately that full full package cost more than arm and a leg.
    We have the full Nastran package, itís not that much more

  8. #48
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    Default Re: The marvel of modern CAD

    Quote Originally Posted by BruceB View Post
    Just for interest sake, what are you running on Nastran that you canít get from Stress Analysis. We use both, but for different problems. Interested to hear your take. From what I remember you are involved in die cast wheels, or am I confused?
    I'm in composite materials. The solidworks version I worked on a few years ago did not have composite elements or failure criteria.

    Inventors Nastran is also more user friendly in its meshing than Solidworks FEM.

  9. #49
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    Default Re: The marvel of modern CAD

    I last worked in Solidworks in ~2008. Composites makes sense in Nastran the inbuilt Inventor FEA doesn't do non isotropic elements.

    But along the line of Uys' original post of ~8 years ago. Try drawing something like this in 2D or on paper:

    Click image for larger version. 

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    Which is a single component in this upper frame:
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    Or the ability to build an accurate virtual prototype that you can take this:
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    to this:
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    with almost zero rework. We were even able to hit the required axle weights within about 5%. We're allowed 39t all up with 16t on the front axles and 23t on the rears and we were 15.9t on the front and 22.995t on the rear in the end. No way in hell you do this with 2D, zero chance.

    With a decent FEA package like Nastran you can run a buckling analysis to determine buckling mode shapes, particularly in local plate buckling. When you work in an industry where you sell your prototypes this along with a fatigue analysis is vital.

    Click image for larger version. 

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    These tools also then allow you to take this FEA model and develope the manufacturing model straight off it, CNC plasma cut plates bent straight off the part drawing just fit into the weldment. Again something impossible when I started my career in the 90's.

    The other thing that has helped is the massive increase in computing power. The average PC user will not have noticed any real improvement in processor speeds. When I work on my wife's little laptop to do email/word/zoom it feels the same as my desktop, but start running a big FEA or open that rig model above and you want one of the machines in the office with 64GB of RAM the 32GB machines start to struggle quickly.

  10. The Following 3 Users Say Thank You to BruceB For This Useful Post:


  11. #50
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    Default Re: CAD bumper design

    Quote Originally Posted by mike cullen View Post
    Uys do you have drawings for Discovery 2 bumpers? willing to pay a fee. Thanks Mike 0824473699
    Quote Originally Posted by Uys View Post
    No I do not have any.
    I have what was told to me are D2 bumpers, but they are not well set out, so if Uys can tidy them up for us, I'd be happy to let you have them.

    Meneer Uys, kan jy miskien hulp gee?
    Cheers,
    John Kilfoil

    Rover P6
    Land Rover Discovery II Td5 Manual
    Range Rover P38 HSE
    Moto Guzzi LeMans
    Aprilia Tuono V2

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