Contour plot doesn't match legend

rvprrone76 · Jan 3, 2022

Hello all,

I modeled the simple torque a shaft. The results should be linear but my contour plot shows the change to have only occurred through the first element of the shaft and not the entire shaft. The values of the output (UR, UR3) are correct, but the contour plot of the whole shaft should reflect the linear change seen in the legend not just the first element. I plotted the angle of twist along a path of nodes which confirms the increasing angle of twist is linear. Is there a way to get the contour plot to reflect this more accurately?

Kind regards,

RP

Screen_Shot_2022-01-03_at_12.14.50_PM_uhbpqa.png

FEA way · Jan 4, 2022

If you probe the values in this contour plot you will see that they are non-zero only on this one face colored red (the rest is an interpolation). Nodes belonging to this face are likely part of the rigid body constraint and that’s why you can see the rotation there. The path plot that you show here in fact consists of two points - first and last node, where rotation is non-zero (as discussed above) and zero, respectively. Nothing in between. If you check the box to include intersections for this path plot, you will see that the values are zero in the middle of the bar. Keep in mind that nodes of solid elements don’t have the rotational degrees of freedom (and that’s why we have to use a rigid body or other constraints to apply torque).

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Contour plot doesn't match legend

rvprrone76

Student

FEA way

Mechanical

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