Ansys Learning Forum › Forums › Discuss Simulation › General Mechanical › My result does not match for verification of compression test, any body can help me to understand? › Reply To: My result does not match for verification of compression test, any body can help me to understand?
September 6, 2021 at 5:54 pm
peteroznewman
Subscriber
Dear
Good.
You set the Element Size as a Parameter and select a Result as a Parameter then let the Parameter Study automatically run through a set of element sizes. It might be the number of elements through the thickness: 1, 2, 3, 4 linear elements and then repeat for quadratic elements. The problem is you will need a big computer with lots of RAM and storage to run this, or do it on a 1/8 symmetry model to reduce your model size.
Have to look into that more closely. Investigations should be done on a 1/8 symmetry model to get results more quickly.
Yes, I was wrong when I said it matched. It clearly does not. I believe you used linear tetrahedral elements and have only 2 elements through the thickness, so that is overly stiff compared with using quadratic elements and more elements through the thickness. I think the Mesh convergence study on the 1/8 symmetry model may show how the slope of the linear elastic portion of the graph changes with element order and number of elements through the thickness.
You set the Element Size as a Parameter and select a Result as a Parameter then let the Parameter Study automatically run through a set of element sizes. It might be the number of elements through the thickness: 1, 2, 3, 4 linear elements and then repeat for quadratic elements. The problem is you will need a big computer with lots of RAM and storage to run this, or do it on a 1/8 symmetry model to reduce your model size.
Have to look into that more closely. Investigations should be done on a 1/8 symmetry model to get results more quickly.
Yes, I was wrong when I said it matched. It clearly does not. I believe you used linear tetrahedral elements and have only 2 elements through the thickness, so that is overly stiff compared with using quadratic elements and more elements through the thickness. I think the Mesh convergence study on the 1/8 symmetry model may show how the slope of the linear elastic portion of the graph changes with element order and number of elements through the thickness.
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