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  • Users: Aled87
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  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

    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...
  5. 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
  6. 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
  7. 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...
  8. 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...
  9. 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...
  10. 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...
  11. 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
  12. 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,
  13. 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...
  14. 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
  15. Aled87

    Simulating cam-follower stresses in FEA

    I'm attempting to simulate a cam lobe moving across a flat follower face in FEA to determine contact stresses, whats the best way to go about applying the forces? I have the tappet fully constrained, do i use a bearing force, or idealised geometry to apply a force?? Some advice would be great...
  16. Aled87

    Dynacam software Student Edition

    Does anybody know if the student edition of dynacam software is any good, i'd like to buy the original version but it's quite expensive. If anyone knows where i can get it cheaper or le tme know if the student version is any good. would be appreciated many thanks
  17. Aled87

    Compression springs in NX

    I'm attempting to model a compression spring in NX i have the main coil sections done using a swept feature and sketches, however i am having difficulty modelling the ends of the springs as the pitch at the spring ends is different to the main coils. Any help in how this problem can be solved...
  18. Aled87

    Rotating parts within part files

    I have used the mirror body feature to generate the lobes on a camshaft, i wondered if there is a way i can rotate each section of the mirrored parts to have the cam lobes for each cylinder 90degrees apart, help would be appreciated, thanks
  19. Aled87

    Camshaft design book

    I'm looking for a good book that explains really well the principles of camshaft/cam profile design. Which will hopefully include: calculations/maths, types of cam, materials, manufacturing,applications, etc....thanks
  20. Aled87

    Calculate shaft diameters

    I have a fixed compound geartrain design consisting of an input gear of 44teeth, a second and third gear joined on a layshaft with 14 and 44 teeth respecively and an output gear of 14 teeth. GR1=44 GR2=14 GR3=44 GR4=14. My question is how do i work out appropriate shaft diameters when a torque...

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