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  • Users: morris9791
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  1. morris9791

    Rule of thumb for sub modelling cut boundary

    Dear Experts, Is there a rule of thumb regarding the distance of the cut boundary relative to the point of interest. I find I have to try different distances /re analyse to verify that the cut boundaries of the submodel are far enough away from the concentration Thanks Eddie
  2. morris9791

    Stress Life - Strain Life Fatigue Query

    Dear Experts, We have experimentally tested fatigue data of cast steel notched and unnotched dumbell specimens to which there is a stress life curve. Is this stress life curve suitable for stress above yield of the material as we have determined from our FEA? I realise strain life curve would...
  3. morris9791

    Run Flats Material Density Query

    Dear All, As part of my work to get some rotational inertias, does anyone know what the typical density of run flats such as the VFI by Hutchinson for off road vehicles? I believe it is a composite of rubber and carbon fibre, i tried search for density of it but no luck Thanks eddie
  4. morris9791

    FEA simulation of residual stress from Shot peening process

    Dear All, Is it possible to simulate the effects of shot peening using FEA methods. Would applied uniform displacement to the surface be a suitable method? Or is custom non linear material data like kinematic strain hardening required? Thanks
  5. morris9791

    Stress Concentration on shaft w/ tranverse hole

    I currently have an FEA of a solid pin with a hole drilled perpendicular to shaft axis of rotation and located centrally long shaft length. The shaft is subject to pure bending. Mesh refinement was performed on the hole feature until convergence. As expected stress concentrations occur on the...
  6. morris9791

    Pros and cons of 8*8 against 6*6 wheeled vehicles

    Dear Experts, Does any know of a source to get info regarding the advantages/disadvantages regarding the ride/handling, weight transfer comparison of 6*6 against 8*8 etc? Thanks eddie
  7. morris9791

    ISO SAE standards for Heavy Vehicle Ride and Handling

    Dear Experts, Are there any standards for the testing of heavy vehicles subjected to sine wave road profiles? ISO or SAE? I currently have standards for open loop test methods and steady state circular tests methods Any information appreciated. Thanks
  8. morris9791

    Ansys nCode Design life

    Dear Experts, Does anyone know the basic price of this new Fatigue predictor integrated into Ansys WB provide by HBM-ncode? Thanks Eddie
  9. morris9791

    Selecting components in graphics area / PDMworks

    Hi Folks, In the past (Solidworks 2009), there was a very useful feature where one could select a part or sub assembly in the graphics area and it would automatically highlight that selection in the PDM works tree. This is not working correctly anymore in Solidowrks 2010 SP4. IT might...
  10. morris9791

    LMS Simulation Vehicle Drift

    Dear Experts, I am using LMS Virtual.Lab to simulate straight line motion of an 8*8 vehicle. However, this model is drifting significantly and I cannot find the culprit. I have checked the following • steering system (wheel yaw ~ 0.15 etc) • weight distribution (rear bogie heavier loaded...
  11. morris9791

    Mathematics Forum

    Dear Experts, Can anyone point me towards a useful Maths Forum website for Scientists and Engineers for submitting Math problems? Thanks Eddie
  12. morris9791

    Dynamic Wheel Forces for subsequent Component Design

    Dear Experts, I have just come across products online that capture dynamic wheel forces for cars and heavy vehicles by attaching the device to wheels etc. Is data from such a device commonly used by OEM's to help design suspension and hub components due to forces acting on the wheel? Or what...
  13. morris9791

    SAE or European Equivalent for brake performance of Heavy Vehicles

    Dear Experts, As part of our tapered wheel bearing approval, I wish to determine a target figure for braking in km which is based on average deceleration, velocity and the number of km travelled per brake application. Can anyone direct me to sources or standards used for guidelines on braking...
  14. morris9791

    Calculation of Pin bending Stress inside a collar

    Dear Folks, Is it possible to do a hand calc to determine the bending moment of a pin which is inside a collar? (See Schematic attached) The collar is in the form of a bushing that surrounds the pin. I ultimately want to calculate the pin stress due to bending and shear etc. I can calculate...
  15. morris9791

    Fatigue Data - 50% Probability Query

    Dear Experts, I have a general query regarding approaches to take when there is a lack of sufficient data for fatigue analysis. Is it the case that most fatigue data corresponds to average stress-life or strain-life curves fitted to a set of test data which relates to 50% survival probability...
  16. morris9791

    Recommend Mechanical Engineering Design Books

    Dear Experts, I wish to buy a good engineering design book for use as reference. Currently my workplace has the following: • Machine Design: An integrated approach by Norton. • Mechanical Engineering Design by Joseph Shigley. • 27th Edition of Machinery's Handbook. • Mechanics of Materials by...
  17. morris9791

    Dog Clutch Calculations

    Dear Experts, Is there a standard available for the design dog clutch teeth and calculating the strength of same? Any resources I can follow up? Best Regards Eddie
  18. morris9791

    Surface Hardness-Case Depth Query

    Dear Experts, I have 2 drawings (Pinion and Gear) which illustrates materials of class 86xx and 41xx with core yield of 500MPa and 850MPa respectively. Both have the same hardness specifications e.g. 30-45 HRc, case depth in mm with 50HRc and surface hardness up to 62HRc. I need to do an...
  19. morris9791

    Gear Design criteria for Momentary Overload

    Dear Experts, I have to size a gear that is sufficient for momentary overload, for example a max stall torque. According to AGMA, the gear material yield stress (Say) should be used to determine the max allowable stress instead of the fatigue bending strength (Sat). 1) By how much is one...
  20. morris9791

    Suitable Rubber mounts for Axle attachment to chassis

    Dear Experts, What products are normally used for mounting the axle housings onto the chassis? We use trelleborg anti vibration cab mounts. What is the normal way of sizing these mounts? My method: An FEA analysis on the housing which contains the reaction bearing loads due to applied torques...

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