August 30, 2018 at 2:20 pm
August 30, 2018 at 5:50 pmRahul KumbharAnsys Employee
From the image, the beam without radius R will have stress singularity in the corner. The stresses will be very high and unreal. Try increasing the radius, you may get closely matching result.
August 31, 2018 at 3:25 ampeteroznewmanSubscriber
You have made an error in geometry construction.
If the inner radius is 1 mm and the thickness is 2 mm, then the outer radius must be 3 mm. You used 2 mm.
You were also missing the 4 and 6 mm dimensions.
You quote only one calculated stress, but there are two Sigma Y values, one on the left and one on the right,
because the bending moment is +/- c but the Fy/A is only a compressive stress.
August 31, 2018 at 6:50 am
August 31, 2018 at 3:27 pmssridharAnsys Employee
In addition to the geometry changes that Peter pointed out, consider performing this as a 2D analysis. Here are the results that I got making the geometry changes + performing this as a 2D analysis. I think this way the out of plane Poisson's effect that might be present in a 3D model will be ignored.
August 31, 2018 at 9:53 pm
September 3, 2018 at 1:51 pmAdisaSubscriber
Peter, can you see the analysis of the first post. I got the results of bending stress on the longer beam.
September 3, 2018 at 4:05 pmpeteroznewmanSubscriber
The equations you showed above are for the combined bending and axial load on the short vertical column and are reported as Normal Stress in the Y direction.
The bending stress on the longer beam would be the Normal Stress in the X direction and the simple handbook equation you show for bending stress is correct for the straight section. Once you get to the radius section, that equation is not sufficient.
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