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  • Calculating Shear Stress: Choosing Between Ixx and Iyy for Point P
    If the shear were applied horizontally, then the shear stress at P would depend on Iyy instead of Ixx The shear stress at P is ##\tau = \frac {V ⋅ Q_x}{I_{xx} ⋅ t}##, where V is the shear force, Q x is the first moment of the area between P and the top of the cross section, calculated w r t the neutral axis, I xx is as discussed above
  • Moment of inertia Ixx, Iyy, Izz, Ixy, Ixz, Iyz, etc? - Physics Forums
    Help: Moment of inertia Ixx, Iyy, Izz, Ixy, Ixz, Iyz, etc?? Hi all, Can someone help with a few equations?, i need to know the moment of inertia of a section The section is a column which in the Z direction have 3m, on the X direction has 0 3m and on the Y direction has 0 6m
  • Explaining Mass Moment of Inertia: Izz Different from Ixx and Iyy?
    Ix c x c is of the same form as Izz, but Ixx needs the parallel axes theorem giving, Ixx = Ix c x c + M(L 2)² which gives, Ixx = (1 12)Ma² + (1 3)ML² So, my working was right after all Oh, yes And that web page is also correct
  • How to use my data of Ixx, Iyy and Izz? - Physics Forums
    Using CAD I have the vehicle modeled, and through the model analysis and with the help of excel I have a CG value for the whole car, and I have inertia momentum values for each sub assembly which I combined using the parallel axis theorem to get Ixx Iyy and Izz for the whole car Roll Pitch Yaw General Questions:
  • Determine Mass moment of inertia about any axis given Ixx. . .
    Hello, I am analyzing human motion for each body segment, I have measured values for Ixx, Iyy, and Izz in local coordinate system I want to transfer all body properties from one coordinate system to another using a transformation matrix My question is that, is there a way to calculate mass
  • Moment of Inertia, difference between Ixc, Ix, and Io? - Physics Forums
    So I understand that Ix resistance to rotation around the X axis, Ixc is resistance to rotation around the center of gravity of the shape on its X axis, and Io I was told is also resistance to rotation around the object's center of gravity So, I'm completely confused as to the difference
  • Solved Determine the moments of inertia Ixx, lyy, Izz for - Chegg
    Determine the moments of inertia Ixx, lyy, Izz for the bent rod The rod has a mass per unit length of 2 kg m 400 mm 600 mm 500 mm Select one: a Ixx = 6 26 kgm², lyy = 5 47 kgm2, Izz = 10 9 kgm?
  • Second moments of area Izz and Ixx - Physics Forums
    a) The second central moments of area IZZ and Ixx b) The maximum values of compressive and tensile stresses c) The position on the cross section where the stress is zero Homework Equations The Attempt at a Solution I have done part a and got: Ixx = 5 48E+5 IZZ = 1 75E+5 for part b i know the formulas for compressive stress and tensile stress
  • Calculating Second Moment of Area: How-To Examples - Physics Forums
    how do calculate send moment of area here is the exampel I do understand the way one calculate Ixx and Iyy and Ixy the smaller part has thikness t and the biggest part 3t I get : if you place global coordinate system on the top you will get the position of center of gravity to
  • Second moment of inertia of upside down t beam - Physics Forums
    Then calculate Ixx for the first rectangle about its centroid , add Ad^2 to it, where A is its area and d is the distance from its centroid to the neutral axis, (d=50mm), and add the Ixx for the lower rectangle about its centroid, and add A d^2 to it, where A is the area of the lower rectangle, and d, the distance from its centroid to the





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