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• ANSYS 12 - Beam - Step 6

# ANSYS 12 - Beam - Step 6

Author: Rajesh Bhaskaran & Yong Sheng Khoo, Cornell University

## Step 6: Results

#### Total Deformation

Let first look at Total Deformation. Under Solution (A6), click on Total Deformation. The Total Deformation plot is then shown in the Graphics window.

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You can also animate the deformation by clicking play button right under Graphics window.

#### Bending Stress

Now let's look at the stress on  the beam. Let's expand Beam Tools and click on Direct Stress.

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The direct stress is the stress component due to axial load encountered by the beam element. Since there is not axial load, we expect a direct stress of zero value throughout the beam.

Next let's look at the  Maximum Bending Stress of the beam. Click on Maximum Combined Stress.

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Maximum Combined Stress is combination of direct stress and maximum bending stress. Since we have pure bending problem, the maximum combined stress will be the maximum bending stress.
We expect a pure bending stress in the central region between the two applied forces. Elementary beam theory predicts the bending stress as σxx =My/I. Here

M = 4000*0.1 = 400 N m

I =bh3/12 =(1)*(0.05)3/12 = 1.04e-5 m4 (assuming unit thickness in the z direction)

For this geometry, we expect the neutral axis to be at y =h/2 =0.025 m. So the max value of σxx= M*(h/2)/I = 9.6e5 Pa. This is exact solution to the computational solution.

#### Force Reaction, Moment Reaction

If we click on the Force Reaction, we see that the force reaction at point A and B is 4000, which is what we are expecting. The moment reaction at A and B is also zero, as expected.

Go to Step 7: Verification & Validation

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