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: SkyD
  • Order by date
  1. SkyD

    Future of MSC ?

    Personnally I think MSC are starting to get what they deserve!!! They have been very arrogant over the years thinking that just having the recognition of some industries, they could do nothing to improve their products and keep the same market share and the same prices. I've got a friend who has...
  2. SkyD

    Need formulas (longitudinal tensile/compressive strength)

    I would tend to agree with what SWComposite said. I would be extremely careful in trying to obtain values for strength of a composite laminate with just an equation. There are far too many parameters. If you are doing a very top level study then maybe it is worth it but if you are looking at...
  3. SkyD

    Cad Drawing of a Wortman FX66-17 anyone?

    I totally agree with you berkshire! Michael Selig's database is your best guess. It contains a vast amount of airfoils including some less known... What you'll get from there is a text file with a list of points... I don't know what's available in SolidWorks to enter large series of...
  4. SkyD

    Modeling bolts

    Thanks rb1957 for correcting my answer there on the pre-tension of bolts. When I said we didn't consider the pre-tension loads in our calcs, I was referring to a static analysis of a shear joint... I mainly wanted to emphasise the fact that we do not take into account any load transfer through...
  5. SkyD

    Modeling bolts

    Thanks Guys, I think all this is pretty useful. Aerodesign, I think your method is appropriate for what I want to do. I believe that some people also add an RBE2 to the springs with only RX,RY and RZ as connected degrees of freedom. I would argue that RZ (being the axis of the bolt) may not be...
  6. SkyD

    Modeling bolts

    Hi All! Has anybody got any experience with modelling bolts in FE? We're currently looking at the Main Landing Gear rib attachment to the spar and covers of our wing. We are using shell elements to model the parts (which are all composites) but we would like to assess bolt loads on the various...
  7. SkyD

    Torque Required for an hydraulic motor

    Thanks guys, all this is very useful! I think I should be able to sort it out now... your help is much appreciated! Cheers, SkyD.
  8. SkyD

    Wing spar stress calculations

    I'd also suggest you take a look at "Aircraft Loading and Structural Layout" by Denis Howe. It's quite a detailed book on basic prelimirary sizing and aircraft loading. It's got details of the analysis performed for the Cranfield A1. This is going to be a hell of a lot of work in any case! But...
  9. SkyD

    Interlaminar shear strength of 0 deg UD laminate vs multiaxial.

    Hi RPstress, I don't quite understand why you would knock down the ILSS allowable between a 0deg and a multiaxial laminate... This property is linked to the resin properties. i.e. the resin properties don't change whether your fibres are at an angle to the load or not. Now, on the other hand...
  10. SkyD

    Torque Required for an hydraulic motor

    Thanks Guys! I thought about F=ma obviously or the equivalent... but my reasonning was this: if the speed is constant there is no torque applied... That's obviously in theory with no friction... But obviously if you've ever tried to turn a 4tons tool, you'll know that you can't do it by hand...
  11. SkyD

    Torque Required for an hydraulic motor

    Hi guys, One of the designers in my office has asked me to calculate the torque required to turn a tool around. I must admit I'm a bit rusty when it comes to general mechanics like that... Basically the tool has a prism shape with a horizontal axis of rotation passing through its CG when...
  12. SkyD

    Bicycle design - Load Cases?

    Hi All, I'm a composite stress engineer for an aircraft company. As a mean to develop my knowledge of composite stress and also because I'm really interested by bikes, I have decided to try and design a composite bicycle. Remember Miguel Indurain's Espada made by Pinarello? That's what I'm...
  13. SkyD

    Aerodynamics Without using CFD

    You're right guys, text book are your best guest. For me your best Guess Carla is "Race Car Aerodynamic, Designing for Speed" by Joseph Katz. Definitely a must have in terms of car aerodynamic. You can complete that by another one of his books: "Low Speed Aerodynamic" which is a bit more...

Part and Inventory Search

Back
Top