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Recent content by bljnv

  1. bljnv

    Fatigue in welded structures

    I am referring to BS 7608-1993 standard. I would like to follow this standard for fabricated structures used in mobile equipments. In section 3.1, it says the fatigue analysis procedure for welded structures is based on the assumption that only ranges of cyclic stress are considered for...
  2. bljnv

    Fatigue in welds

    I am referring to BS 7608-1993 standard. In section 3.1, it says the fatigue analysis procedure for welded structures is based on the assumption that only ranges of cyclic stress are considered for evaluating fatigue life i.e. mean stresses are neglected. But for unwelded parts the mean stress...
  3. bljnv

    Fatigue in welded joints

    I am referring to BS 7608-1993 standard. In section 3.1, it says the fatigue analysis procedure for welded structures is based on the assumption that only ranges of cyclic stress are considered for evaluating fatigue life i.e. mean stresses are neglected. But for unwelded parts the mean stress...
  4. bljnv

    PRV spring range

    For a relief valve to be set at a pressure which is on the higher side for the given spring range, the spring is comparatively soft for the given set pressure load. This can cause the valve to achieve an early lift and longer blow down. Conversely if the spring is comparatively stiff, the valve...
  5. bljnv

    Brass plastic combination parts

    I am in the job of designing a plastic casing. The casing is designed to hold air upto 200 psig. The casing interfaces with adjoining threaded parts of M10 and M12 size made of brass. Essentially I would like to have interfacing portions of the plastic part in Brass. Can the experts here provide...
  6. bljnv

    Suggestion

    I want to 3D print a tyre valve which will be used for functional tests. The regular material is brass. I request suggestions on the following. (a) What can be the material for 3D printing? The part made using this material should withstand air pressures upto 10 bar. (b) The valves will have...
  7. bljnv

    Single Well and double well rims

    Thanks CapriRacer for your views. But I am sorry for not communicating the requirement properly. When I said tyre assembly, I meant assembly of tyre over the rim and not the wheel mounting to the axle/hub. In essence, I am asking if tyre assembly over a double well rim is easier than assembling...
  8. bljnv

    Single Well and double well rims

    For some tyres (eg: 500/70R24) we have both W16 and DW16 rims approved. What kind of effect do these rims have during the tyre assembly. What will be the effect on strength between the two design rims. Experts please advise.
  9. bljnv

    Impact load

    I am currently working on a hydraulic cylinder project. The customer specification calls for design adequacy checking of the cylinder against impact of 2800 KN/s. What is this meaning? Is it loading rate? Can somebody provide guidance to approach this problem so that I understand this...
  10. bljnv

    Clamps for wheel

    Thank you Chris
  11. bljnv

    Clamps for wheel

    Mike Thanks for the feedback?! I consider myself dumb enough to understand your elaborate reply for two simple questions. I did not refer to off-high way at least in my second post mainly to avoid repeating "same question in the same words" Regards
  12. bljnv

    Valve flow with given Cv and Inlet Pressure

    Operating pressure differential of 0 psig would not yield any flow across the valve.
  13. bljnv

    Welded bush on taper pole

    Oh! Can you try this. Have a ring of suitable outer diameter and thickness. The inside should have a taper matching the pole, with larger and smaller end dismeter matching the diameters of the pole at locations where you need to have the bush. The bush shall be fixed to the outer diameter...
  14. bljnv

    Welded bush on taper pole

    Is it possible to drill holes with a counter bore to suit the diameter of the bushes. The bush should register inside the counter bore on the taper pole such that the face of the bush butts against the counter bore bottom. The bush face and counter bore face should be machined with reasonable...
  15. bljnv

    Clamps for wheel

    I have seen on internet information regarding the wheel clamps.How much do they cost? What are the points to be looked to ensure their quality and reliability? Do they create any marks on the wheels after the clamps are removed? Who are the reputed manufacturers of these clamps? Do we have...
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