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Plane Frame 1
Step
00
2-D Linear Static Analysis
Model
- 1/4 symmetric Model
- Unit: N, mm
- Isotropic Elastic Material
- Membrane
Loads and Boundary
Conditions
- Edge Pressure
- Constraint (Symmetric)
Results Verification
-
Displacement/Deformation
- Probe Result
Plate with a Hole
¼
Model
Summary
Summary
Plane Frame 2
Step
00 Problem
Plane Frame 3
Step
This problem has 2 planes of symmetry, so we will cut the model in 2 in order
to:
-Reduce the size of the problem
-Reduce model time
-Introduce a blocking of movement of this plate which is only submitted to
pressure load
00 Problem reduction due to symmetry
Plane Frame 17
Step
17
Total Solutions for True Analysis-driven Design
Analysis of results
Plane Frame 18
Step
18
Total Solutions for True Analysis-driven Design
Comparison for different mesh sizes and types
Plane Frame 19
Step
19
Total Solutions for True Analysis-driven Design
We will use 2 types of mesh:
-Linear Triangle mesh (TRI3) has 3 nodes/element
-Quadratic Triangle mesh has 6 nodes/element
Linear and quadratic elements
Plane Frame 20
Step
20
Total Solutions for True Analysis-driven Design
Results for linear triangle elements
Plane Frame 21
Step
21
Total Solutions for True Analysis-driven Design
Results for quadratic triangle elements
Plane Frame 22
Step
22
Total Solutions for True Analysis-driven Design
Comparison between triangle elements
Plane Frame 23
Step
23
Total Solutions for True Analysis-driven Design
Comparison between quad elements
Plane Frame 24
Step
24
Total Solutions for True Analysis-driven Design
Results for linear triangle elements
Plane Frame 25
Step
25
Total Solutions for True Analysis-driven Design
Results for quadratic triangle elements
Plane Frame 26
Step
26
Total Solutions for True Analysis-driven Design
Comparison between triangle elements
Plane Frame 27
Step
27
Total Solutions for True Analysis-driven Design
Meshing adapted to the geometry
To get better accuracy and be efficient (less number of elements), use adapted mesh
Plane Frame 28
Step
28
Total Solutions for True Analysis-driven Design
Conclusion
-Always prefer linear quad elements to linear triangle elements
-To get superior accuracy for ordinary displacement analysis, use 2nd order
triangle elements
-For stress analysis, linear elements converge more slowly than for simple
displacement analysis
-> When performing stress analysis, always use 2nd order elements
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