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  • Users: Mr_Curious
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  1. Mr_Curious

    How can such a part be made from steel?

    Hello everyone. Designed a fun but don't know whether is it possible to make such part from steel. How can such a part be made from steel? Sizes in mm. Thank you.
  2. Mr_Curious

    Thermal conductivity and difference interference fit

    Hello. Does the thermal conductivity between steel parts vary with increasing interference fit? For example steel parts with fits H7/p6 and with tighter fits H7/r6 have the sale thermal conductivity? Can anyone provide guidance here?
  3. Mr_Curious

    Threaded hole with cutout on the outer surface of a rotor

    I want to connect the walls of a groove in the rotor with screws so that the size of the groove does not change during rotation. (The groove was machined by mistake). I want to make threaded holes in the groove and screw screws into them. The threaded holes are obtained with a cutout. Have you...
  4. Mr_Curious

    Dehumidifier inside azipod (pod propulsion system)

    Hello. I am seeking information about does pod propulsion system (azipod) have dryer inside in order to reduce humidity so that the insulation of electric motor does not deteriorate. If it is installed there where dryers (heaters) are usually attached ?
  5. Mr_Curious

    Radial load in a vertically mounted thrust bearing

    Hello everyone. A bearing catalog says that it is important that a bearing is applied a required minimum radial load in order to work correctly. I have a vertical electric motor. Thrust bearing is installed at the top of the motor. My question is how to calculate what radial load is applied...
  6. Mr_Curious

    Bearing Limiting speed

    Hello Dear Engineers. I am designing a traction motor and have selected SKF NJ 2228 bearings for them. I am wondering what is the Bearing Limiting Speed and how to calculate it? SKF catalog says that limiting speed of the bearing is 4800 rpm. I think it is for oil lubrication. I'm wondering...
  7. Mr_Curious

    Stress in lifting lug is above yield

    Hello Dear Experts. I have a construction with lifting lugs. FEA analysis showed an area with the stress in lifting lugs higher than yield strength. The area is shown in the picture below (red color). The lugs were tested in real-life successfully. But I need to write a conclusion for my FEA...
  8. Mr_Curious

    Help me please evaluate a stress under bolt head

    Hello everyone. I am designing a machine which has a bolt connection, and there is stress on one of the part under the bolt head, exceeding a yield strength. The stress is caused by bolt head preload pressure only, because external loads have no influence on the point of interest. The yield...
  9. Mr_Curious

    static coefficient of friction between two steel milled surfaces

    Hello everyone. I am looking for a static coefficient of friction between two milled dry A 516-55 steel surfaces for calculating a threaded connection. I have found a table of friction coefficients in Nasa's Fasteners design manual (below). There two types of steel I can choose from. Which is...
  10. Mr_Curious

    Mesh failed

    Hello everyone. I have no idea how to create the mesh on my model. I've tried to create it by default and with some face sizing adjustment on tiny faces, also i've tried with different values of Element size from 85 to 40. I've checked mistakes by Fault Detection in Design Modeler and...
  11. Mr_Curious

    Weld seam around a part in Design Modeler

    Hi everyone. I need help. I faced with a tricky issue. I need to model the weld seam around the part in Design Modeler, like in the picture below. Does anyone know how to do it?[cyclops]
  12. Mr_Curious

    Need advice on FEA settings. Result is not satisfied of required safety factor.

    Hi everyone [smile]. I am making stress analysis of an electric motor. The problem is i have gotten the higest stress near the weld connection which is the reason why my construction is not satisfied the required safety factor. The highest stress is situated at one fourth of the part depth...
  13. Mr_Curious

    Weld calculation

    Hello everyone. I am new at weld calculation. And I am looking for an information on how to calculate weld connections properly. In particular, I have an electric motor with a terminal box that is welded on the side. There are two welds, inside and outside of the box. I have tried to calculate...
  14. Mr_Curious

    dynamic viscosity coefficient iso vg 32

    Hello dear friends. Please, share an information of dynamic viscosity coefficien for iso vg 32 oil for various temperature.
  15. Mr_Curious

    Critical speed rotor calculation

    Good day engineers. I am looking for a procedure of rotor critical speed calculation. Could you advise me some useful books or a links? Thanks in advance!

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