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ST7-1.57.20.17 Curved Pipe Element Stress
When a beam is curved, the neutral axis shifts in towards the centre of curvature. This results in higher stress on the inner edge of the curved beam. Strand7 has a curved beam element that considers this effect, which is the pipe element with a Pipe Radius attribute applied (Attributes/Beam/Pipe/Radius). The magnitude of the shift away from the neutral axis is generally calculated from elasticity theory.
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