Supriya Ghosh (Editor)

Radial stress

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Radial stress is stress towards or away from the central axis of a component.

Contents

Pressure vessels

The walls of pressure vessels generally undergo triaxial loading. For cylindrical pressure vessels, the normal loads on a wall element are:

  • the longitudinal stress
  • the circumferential (hoop) stress
  • the radial stress.
  • The radial stress for a thick-walled cylinder is equal and opposite to the gauge pressure on the inside surface, and zero on the outside surface. The circumferential stress and longitudinal stresses are usually much larger for pressure vessels, and so for thin-walled instances, radial stress is usually neglected.

    Formula

    The radial stress for a thick walled pipe is given by σr = [(pi ri2 - po ro2) / (ro2 - ri2)] + [ri2 ro2 (po - pi) / r2 (ro2 - ri2)] where ri is the inner radius, ro is the outer radius, pi is the inner absolute pressure and po is the outer absolute pressure.

    References

    Radial stress Wikipedia


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