Benchmarks¶
Complex Benchmark- Lightweight Piston Connecting Rod¶
This comparison is for a complex geometry with a lattice. The goal is to compare the displacement and stress results for a similar number of elements. The stresses are compared away from stress singularity as stresses in areas of stress concentration do not converge.
📌 See the file Example_StaticConnectingRod.ntop in the Getting Started\Static Structural folder. Update the Project Directory variables and manually run the unloaded lattice block to generate the geometry.
Number of Elements |
Displacement (mm) |
Total Time (secs) |
|
|---|---|---|---|
nTop mesh-based FEA |
321,000 |
1.24 |
350 (includes meshing) |
Intact IMM FEA |
326,000 |
1.20 |
111 |
von Mises Stress comparison
Standard Benchmark- Beam¶
📌 See the file Benchmark_PlateWHole.ntop in the Getting Started\Static Structural folder. Update the Project Directory variables and manually run any necessary unloaded blocks.
Displacement from Intact IMM vs nTop mesh-based FEA
Analytical |
nTop mesh-based FEA |
Intact IMM FEA |
|
|---|---|---|---|
Beam Bending |
59.19 mm |
58.98 mm |
58.57 mm |
Beam Twisting |
- |
15.78 mm |
15.77 mm |
Standard Benchmark- Plate with a Hole¶
📌 See the file Benchmark_PlateWHole.ntop in the Getting Started\Static Structural folder. Update the Project Directory variables and manually run any necessary unloaded blocks.
The theoretical stress concentration (Stress XX) value can be computed using the analytical formulation, giving a stress concentration value of 3.72 Pa.
The figure below compares stress concentration due to the hole in a plate as obtained from mesh-based FEA and Intact IMM FEA, both for approximately 400k linear elements.
Standard Thermal Benchmark - Cylinder with Convection¶
📌 See the file Benchmark_ThermalCylinder.ntop in the Getting Started\Thermal folder. Update the Project Directory variables and manually run any necessary unloaded blocks.
Reference* |
nTop mesh-based FEA |
Intact IMM FEA |
|
|---|---|---|---|
Inner Temperature (K) |
545.45 |
545.36 |
545.44 |
Outer Temperature (K) |
478.25 |
477.96 |
477.66 |
Inner Convection (W/m^2) |
34,160 |
33,294 |
33,605 |
Outer Convection (W/m^2) |
26,280 |
27,164 |
26,478 |
*Societe Francaise des Mecaniciens. Guide de validation des progiciels de calcul de structures. Paris, Afnor Technique, 1990. Test No. TPLA03/89.
Temperature:
Heat Flux:
Standard Modal Benchmark - Free Plate¶
📌 See the file Benchmark_FreePlate.ntop in the Getting Started\Modal folder.
Frequency (Hz) Comparison
Mode |
Reference |
nTop Results |
|---|---|---|
1 |
1.622 |
1.621 |
2 |
2.360 |
2.361 |
3 |
2.922 |
2.925 |
4,5 |
4.233 |
4.193 |
6 |
7.416 |
7.372 |
Standard Thermoelastic Benchmark - Uniform Temp Beam¶
This problem studies a straight beam with dimensions of 1×1×10 mm subjected to a uniform temperature change.
📌 See the file Benchmark_ThermoelasticBeam.ntop in the Getting Started\Thermoelastic folder.
Theory (Compressive) |
Intact (Compressive) |
|
|---|---|---|
Stress xx (Pa) |
2.52e8 |
2.516e8 |
