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  • Users: MarkUMSU
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  1. MarkUMSU

    Flex an Assembly in SW2009

    I have some nested tubes in an assembly. (Picture a coaxial cable.) I'm looking for a way to use the Flex feature efficiently so they will bend as a group. Is there a better way than defining a Flex feature in each of the components? What would you recommend? Thanks!
  2. MarkUMSU

    Mechanical rates and contracts

    I have 2 questions. I've recently incorporated a company to do some product design and development consulting work and am on the verge of starting a small project with my first client. I'm wondering a bit about liability since hearing about people suing McDonalds over spilled coffee. Is it...
  3. MarkUMSU

    Silver plated Nitinol

    I'm looking for someone experienced in plating nitinol wire. I'm looking for 6' pieces and long lengths of wire 500+ feet. Any suggestions? Thanks Mark
  4. MarkUMSU

    Soldiworks on a Macbook

    Has anyone tried running solidworks on a macbook?
  5. MarkUMSU

    ProE on a Macbook

    Has anyone tried running ProE on a macbook?
  6. MarkUMSU

    elastic strain limits

    I'm comparing different metals that could be used to make a particular spring/flexure. In this case the amount of strain possible without plastic deformation is an important parameter. Does anyone know of a material that could be comparable to NiTi (Which I believe can undergo about 8% strain...
  7. MarkUMSU

    viscous pore/orifice flow

    I'm looking for a guideline for approximating flow velocity through a pore or orifice for a given pressure and viscosity. eg My pressure differential is 13 kPa The pore/orifice size is 0.5mm Will a fluid with a viscosity of 1000cP be able to flow through this hole? What would be its...
  8. MarkUMSU

    Training your replacement

    What would you do if you suspected you were going to be laid off at the end of the month and were being asked to begin training your successor?
  9. MarkUMSU

    Phsycal Wire Selection

    I'm looking for a thorough wire design/selection reference from a mechanical point of view. More specifically, I would like to select the best type of electric wire (~AWG 24) to survive bending fatigue over a temperature range from about 0-100C. Recommendations vendors?
  10. MarkUMSU

    Becoming better at tolerancing

    I would like to learn more about tolerancing from the perspective of design for: functionality, manufacturing, reliability, and cost. Do you believe the books referenced here would be appropriate? Do you have a different suggestion? http://www.eng-tips.com/viewthread.cfm?qid=179123&page=1...
  11. MarkUMSU

    Slip Ring Noise

    I want to use a slip ring to carry vibration data from the end of a rotor mounted on a slightly unbalanced shaft but have some reservations as I've seen other posts mentioning slip ring noise contaminating data. I'm considering the Moog model AC6231. They claim acceptably low noise levels...
  12. MarkUMSU

    Mechanics Calculators

    Sometimes I see people asking for various online calculators. Here's one that you may want to add to your database. http://emat.eng.hmc.edu/Calculators/calculators_index.htm
  13. MarkUMSU

    Prototyping materials

    I'm looking for a company that carries and ships an array of materials and components in Europe (Italy). Something like www.mcmaster.com would be ideal. Any suggestions? Thanks Mark
  14. MarkUMSU

    Mac CAD

    I just wanted to ping you guys if anyone has any new news of success or failures running Solidworks on an intel macbook. Cheers Mark
  15. MarkUMSU

    Mac CAD

    I just wanted to ping you guys if anyone has any new news of success or failures running ProE on an intel macbook. Cheers Mark
  16. MarkUMSU

    Hardness from Tempering

    I was looking at some metals on MatWeb and saw several examples where different tempers seem to change the hardness, yield, and ultimate strength, but the elastic modulous appears the same. I'm baffled by how this could be possible unless the data is in error. Does anyone have a better...
  17. MarkUMSU

    energy = f(amplitude, freq)

    What is the relationship to express power required to force an object to vibrate a varying amplitude and frequency for a known mass, spring constant, and damping value? Thanks
  18. MarkUMSU

    Solidworks on a Mac

    Has anyone tried to run solidworks or other CAD programs on a new macbook that can run windows? Does it work? Does it work well?
  19. MarkUMSU

    CAD on an Apple

    Has anyone tried to run Pro/E, Solidworks, or other CAD software on one of the macs that can run windows? How did it work out? I'm considering getting one, but the only concern is that I won't be able to use it for engineering.
  20. MarkUMSU

    Potting: Converting Durometer to Elastic Modulus

    I'm working to select an elastomer to pot some electronics for use in high vibration. It could be helpful to know the elastic modulous of resins, but manufacturers typically report hardness. I know that there's no direct anylitical conversion between durometer and modulus of elasticity, but...

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