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MOMENTS OF RESISTANCE SECTION

Lecture



The axial moment of resistance is the ratio of the moment of inertia about a given axis to the distance from the axis to the most distant point of the cross section
  MOMENTS OF RESISTANCE SECTION
The polar moment of resistance is the ratio of the polar moment of inertia to the distance from the pole to the most distant point of the cross section
  MOMENTS OF RESISTANCE SECTION
The center of gravity of the cross section of the rod is taken as the pole.
Axial moments of resistance for the simplest sections (I xc and I yc are the central moments of inertia of the sections):
1. For a rectangle (fig. 4.10).
  MOMENTS OF RESISTANCE SECTION
2. For a triangle (Fig. 4.11).
  MOMENTS OF RESISTANCE SECTION
  MOMENTS OF RESISTANCE SECTION
(for upper fibers).
Similarly, you can calculate the moments of resistance about the axis of the left and right fibers W St , W pack
3. For the circle (Fig. 4.12).
  MOMENTS OF RESISTANCE SECTION
4. For the semicircle (Fig.4.13).
  MOMENTS OF RESISTANCE SECTION
  MOMENTS OF RESISTANCE SECTION
5. For tubular section (Fig. 4.14).
  MOMENTS OF RESISTANCE SECTION
Polar moment of resistance for tubular section.
  MOMENTS OF RESISTANCE SECTION

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GEOMETRIC CHARACTERISTICS OF FLAT SECTIONS

Terms: GEOMETRIC CHARACTERISTICS OF FLAT SECTIONS