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Recent content by Aled87

  1. Aled87

    Measuring angular deviations of an object submersed in fuel using accelerometers

    Dear all, I have a project that i am working on where i need to measure the tilt/angle of an object at high pump speeds over 6000rpm. I was wondering if anybody had any experience of using a wireless accelerometer to dynamically measure angle. And also has to be located in fluid medium and so...
  2. Aled87

    Measuring angular deviations of an object submersed in fuel using accelerometers

    Dear all, I have a project that i am working on where i need to measure the tilt/angle of an object at high pump speeds over 6000rpm. I was wondering if anybody had any experience of using a wireless accelerometer to dynamically measure angle. And also has to be located in fluid medium and so...
  3. Aled87

    measuring air content in fuel backleak

    Im looking at instrumenting a fuel pump to measure the amount of air ingress/bubbles in the backleak flow. I as thinking of using a mass flow meter but im not sure how i distinguish from massair or mass of fuel. My other thought is to direct the fuel into a container where i Can measure the...
  4. Aled87

    stribeck curve over velocity --> speed (rev/s)

    simunanut, whats the name of the empirical model that you have found for sliding friction? i would like to check it out for help on my final year project which is based on engine friction, many thanks
  5. Aled87

    Problems with mesh mating conditions in NX

    Lately i have been trying to solve some fairly large assemblies in NX 7.0 using mesh mating conditions between joints, however whenever i try to solve i get this error message: DOF 1 of node 188323 is set as dependent by element 191646 in mesh "auto_mmc_3_mesh" and by element 188438 in mesh...
  6. Aled87

    Simulation of oil film stiffness in NX?

    Hi guys, Is there a way that NX 7.0 can simulate the effect of oil stiffness in bearings for dynamic analysis of a crankshaft. If not is there some form of spring elements i could you to represent this, Many thanks
  7. Aled87

    KX2 1100 Bolt, what does it mean??

    I have a bolt where the head is marked KX2 1100, does anybody have any specifications of this bolt. im trying to find ultimate tensile strengths and yeild strengths, thank you
  8. Aled87

    Stress concentrations in threaded fasteners

    Dear all. Im currently trying to find stress concentration factors for thread dimensions and having no luck whatsoever!! I can't seem to find anything anywhere, which seems impossible? I have attempted an FEA of the fastener but it won't solve due to the mesh size. Please help, any...
  9. Aled87

    Bolt thread stress concentration factors

    Dear all, I'm attempting to determine stress concentration factors in screw threads for con rod bolts. I Have the nominal stresses defined but need to account for stress concentration due to notches. I am unable to find any methods that account for notches in bolts so any advice would be...
  10. Aled87

    Smoothing FEA results

    I have a set of FEA results in NX 7.0 for a con rod under load, however the mesh is notchy and inaccurate, i know there is a mesh smoothing option or averaging tool that displays the results better. However I just can't seem to find it. If anyone knows which tab this would be under would be...
  11. Aled87

    Surface contact mesh error message in NX

    I am attempting to model stresses due to contact between two cylinders under an applied force, using a surface contact mesh in NX 7.0. I am using a 3d tet mesh with contacts between the two cylinders, however when i solve the model i get an error message stating "contact orientation vector...
  12. Aled87

    Measuring the area of a face in NX 7.0

    I need to measure the area of a face in NX 7.0 i have found face analysis but see no option for measuring the area of the face. Can anyone help me with this issue Many thanks
  13. Aled87

    Connecting rod design

    Hi, I'm looking for a good book on connecting rod design, i.e. forces, fatigue stress, optimisation, etc. Does anyone know if there are any out there? some guidance would be appreciated Many thanks,
  14. Aled87

    Simple bearing friction equations

    iM Trying to calculate friction loss in a camshaft journal bearing based on a basic coefficient of friction of 0.1, what equations do i use to calculate friction in a bearing? I know that the change in velocity at a constant speed is zero therefore work done is zero? Although there must be a...
  15. Aled87

    Motion Simulation of Valvetrains

    Hi guys I'm attempting to generate movement of rotation into translation between cams and tappets in a valvetrain in NX motion simulation, what kind of joints would i need to use for this?, any constraints to be applied? many thanks

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