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  • Users: JSF
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  1. JSF

    Bent Column End Moments and Pcr

    The picture you are showing at the joint C is a flexible joint?? It is unstable and you do not want to design that way. Looks like you have two beams are joined at C. is that what your design is? JSF
  2. JSF

    Trouble with Bruhn, A17

    Sparweb, What type of Antenna? I agreed with Philcondit. Any antenna may have vibration and side loads. The antenna installation is not correct. Either it tied to frame or have stiffeners to take the side load moment out. Skin can not take the large side load and due to the vibration the...
  3. JSF

    Extrusion vs milling

    Dan, You have to check what is the origanl part extrusion. If the extrusion is 7075T6511 you need to check what is the dimension of the extrusion. If you machine the part out of 7075T73 Plate you need to check the Ftu, Fty property to make sure your orignal applied load and material allowable...
  4. JSF

    Short ED, again

    Koopas, When you calculate your SED material shear allowable the formula Pso = Fsu_mat'l*2*t*(Edge Distance-0.383*D_hole) Edge Distance should be measure from the center of the hole to the edge of the part. This allowable is for your material shear out. If you have ED is less than 2D, you need...
  5. JSF

    NAS1097AD Rivets

    To Rob, Nigel, and SparWeb The NAS1097 rivet is developed by Douglas aircraft with a reduced countersunk head. The MS20427 rivet is a larger countersunk head which can knife-edge the skin (sheet). MIL HB-5 provide the bearing/shear failure of the joint strength. MIL HB-5H (Latest J) table...

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