Differents results from linear to quadratic elements
Question:
Answer:
You will understand that higher order elements will give results closer to exact results than linear elements. Also, if we make finer mesh with linear elements we will obtain results closer to exact results.
Hi,
We are testing solid model with linear VS quadratic elements, if you confront slide 3 and 5 you can see wide difference in the results, why?
Regards
Answer:
You will understand that higher order elements will give results closer to exact results than linear elements. Also, if we make finer mesh with linear elements we will obtain results closer to exact results.
Let me give you my test results which shows above. This test model is simplified from your model.
1. Linear element model: 1457 N/mm2 (Nodal average)
2. High order element (Quadratic): 2162 N/mm2 (Nodal average)
3. Finer mesh with linear element: 2095 N/mm2 (Nodal average)
Nodo Solido in acciaio.7z
DataImage64.png
High order element model.fea
Finer mesh with linear element model.fea
Linear element model.fea
DataImage41.png
DataImage17.png
DataImage11.png
| Files | ||
|---|---|---|
|
|
||
|
|
DataImage64.png
219 KB
|
|
|
|
||
|
|
||
|
|
||
|
|
DataImage41.png
156 KB
|
|
|
|
DataImage17.png
126 KB
|
|
|
|
DataImage11.png
124 KB
|