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Henry Kurniadi

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Henry Kurniadi last won the day on November 17 2017

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  1. If some of you know or experienced with fluid (air, water, oil, etc) come here

    This means "pressure vessel", right? You need to design the pressure vessel based on your usage (dimension, materials, fluid density, corrosive-ness, etc.) The design shall follow ASME Section VIII. The output is what is the wall thickness, welding location/throat, flange dimension/thickness, openings and other accessories (faucets, valve, etc.). I had done one design for a client company that plan to use it for sewage water treatment a few years ago. Service comes at a cost, though.
  2. 99.99999999% You don't design a bearing as a mechanical engineer. You choose your bearing based on your engineering calculation. Unless of course, you are working in SKF, NTN or other bearing manufacturers.
  3. Harmonics...

    Harmonics typically related to vibration. Something, say "A", will vibrate erratically under a certain condition. When "A" vibrate erratically, it will likely to fail due to excessive deformation. This "certain condition" could be related to wind flow (for lighting pole), machine rotation (for a shaft) or other factors. Let's say you design a lighting pole equipped with a small windmill on top, in location X. You want to design the whole system (i.e. design the pole) to avoid them having harmonics (excessive vibration) when it installed with local wind condition at location X. (difficult, wind always varied and difficult to predict) You also want to design the pole to avoid them having harmonics with the windmill operational rotation. (Easier to predict)
  4. Screw jacks with long throws

    Not quite understand what you trying to say. But, I take a shot here. Let's say you want to select screw jack for lifting purpose. Typically, the manufacturer of the screw jack has catalog that define the safe limit to lift and max limit. You could start from contacting these manufacturers. Usually though, forklift or other lifting device uses (telescopic) hydraulic cylinders. One manufacturer: http://www.princehyd.com/Products/Hydraulic-Cylinders/Telescopic
  5. Gear Train Control

    Google "Mechanical Governor". There's your answer.
  6. Measuring device range

    You have range switches of 2, 20 and 200. Case 1: If you put the switch to 2, then your measuring device has usage for measuring down to 2/200 = 0.01 (i.e. you could measure from 0 to 2 with minimum measurement of 0.01) For something with exact measure of 1.57, you get 1.57 Case 2: If you put the switch to 20, then your measuring device has usage for measuring down to 20/200 = 0.1 (i.e. you could measure from 0 to 20 with minimum measurement of 0.1) For something with exact measure of 1.57, you get 1.6 Case 3: If you put the switch to 200, then your measuring device has usage for measuring down to 200/200 = 1 (i.e. you could measure from 0 to 200 with minimum measurement of 1) For something with exact measure of 1.57, you get 2
  7. CFD simulation

    Drawing real-life objects in directly in ANSYS usually rather not convinient. People often use SolidWorks or other 3D Modeling software to draw these objects, before importing them to ANSYS Workbench for analysis.
  8. Seeking a mechanical engineer in New York City

    Most of people here coming from the other side of the world... Only a few coming from the New World. But good luck with that, grasshopper
  9. Inverted U or C channel ?

    See here, airfoil cross-section of Mitsubishi A6M3 Zero, a carrier-based fighter, used in World War II Pacific theatre by the Imperial Japanese Navy. C-channel and Z-channel steels are used along with the more common I-beam.
  10. Want to know about Go kart Analysis

    There are: (typically) 1. dead load (structure weight, engine weight) 2. live load (driver weight) 3. wind load Load 3 will be varied according to working conditions. Some working conditions: normal conditions (max speed/rpm), extreme conditions (over-speed rpm), braking conditions.
  11. Tool-Material Interaction: Material Removal Rate

    It’s from a Manufacturing Processes book by Serope Kalpakjian. (Kinda reference for most major college in Manufacturing Processes course) your reference practically replacing my feed rate v=f*N, with object length L. Also using Davg.
  12. Tool-Material Interaction: Material Removal Rate

    Do = 100 mm d = 1 mm f = 0.1 mm/rev N = 2000 rpm v = f*N = 0.1 mm/rev * 2000 rpm = 200 mm/min d = (Do - Df)/2 => Df = 98 mm Davg = (Do + Df)/2 = 99 mm MRR = pi*Davg*d*f*N = pi * 99mm * 1mm * 200 mm/min = 62203 mm3/min = 0.0622 cm3/min
  13. Which CAD package I chose for my professional career?

    1) Never use it 2) Decent, with capability of generating 2D design, 3D design, structural simulation (add-ins), fluid simulation (add-ins) 3) Never use it 4) Use the 2D in college, never know that they could be used for simulation 5) first time heard it from you.
  14. Solidworks - Two parts joined together with table bearing

    Let say the assembly consist of A - contact area - A (one part) Bearing (one part) C - contact area - C (one part) Make two simulations... A with applied force on top; contact area as fixed support. C with applied force on contact area; bottom leg as fixed support Contact area with bearing could be made by using "split" function. Defined as "face" in drawing below.
  15. Solidworks - Two parts joined together with table bearing

    You can do either. Option 1 usually took longer simulation time and you need a good geometry for that to solve.(pic 1 and 2 of your attachment) Option 2 is preferable when you design actual component (you need to know which has which support though) (pic 3 of your attachment). Btw, in this case, Your load should be modeled on the bearing contact area, instead of the whole flat area.