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  1. ArunKumar Bala

    Moment of inertia using Coordinate system

    Hi all, I am trying generate one spreadsheet program which will give answer for moment of inertia using the inputted coordinates. can any body guides me how can we input the formulas for coordinate systems. I have come across various books like Niu, Megson, Bruhn which all tells for particular...
  2. ArunKumar Bala

    Drag counts

    How to calculate the drag counts due to the installation of rivets on the Aircraft structure?
  3. ArunKumar Bala

    Crippling stress - Plasticity factor

    Hi all, How to find the plasticity reduction factor for crippling stress. I have seen such factors only available for Buckling stress in Bruhn C5.7 or C5.8 and the same in Niu. Can anyone suggest a way forward for crippling stress? And which method is efficient to find the crippling stress of...
  4. ArunKumar Bala

    Shear strength data

    swcomposites thanks for your reply. But those websites are not standard ones to refer to in the design analysis.
  5. ArunKumar Bala

    Aerospace strength Volume I & 2 by Todd Coburn PDF copy

    Does anybody have a PDF copy of Aerospace Strength Volume 1 and 2 written and published by Todd Coburn. If anybody has kindly share it with me.
  6. ArunKumar Bala

    Shear strength data

    Can anybody tell me the shear strength of the NAS1669 Jo-Bolt fastener? I checked in the fastener specification I am not getting the value and I have gone through MMPDS-09 also. Nowhere I am to find the shear strength value.
  7. ArunKumar Bala

    Edge distance vs material thickness

    It is not about a thinner part or thicker part edge distance. The issue is which part is having lowest bearing allowable value as per design and which part is affected in your NCR. Need to re-evaluate the NCR bearing allowable value with the reported edge distance and check it is far above the...
  8. ArunKumar Bala

    LN Specifications

    Hi all, Where I can download the LN Series specifications for free.??
  9. ArunKumar Bala

    Countersink filler

    Hi SWComposite, Thanks for your reply.
  10. ArunKumar Bala

    Countersink filler

    HI SWComposite, My issue is with a single part only. Not a joint. The issue here is during the assembly process, the operator has done the wrong countersink on the other side of the part. now we need to correct with doing countersink as per design and thinking of producing the csk filler on the...
  11. ArunKumar Bala

    Countersink filler

    Hi all, Did anyone come across the usage of CSK filler in repair? If yes can we use it in both sides on a single part providing enough thickness on the part?
  12. ArunKumar Bala

    Which Type of Stringers cross section is most preferred in aircraft wing and fuselage

    As for my knowledge, Stringer profiles are selected based on the failure mode and stress to be withstood when it is attached to the skin. And in more the cross-section area of the stringer plays a major role in the design stage. Based on FEA extracted stress acting on the particular area, and...

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