OS-V: 1205 Twisted Cantilever Beam (Explicit Results)
MacNeal-Harder TestA twisted cantilever beam solved with solid and shell elements using Explicit Analysis. A twisted beam model is made with each element type to investigate the effect of distorted elements with a high aspect ratio.
Benchmark Model
As shown in Figure 1, the beam is constrained in x, y and z directions for translational motion. The end of the beam is applied with Force Load. Four types of elements are used for this problem. In-plane bending is used for all the elements.
- Material Properties
- Young's modulus
- 29E+06 Psi
- Poisson's ratio
- 0.22
- Density
- 1E-04 lbm/in3
Results
Element Type | Analytical Result | OptiStruct Explicit Analysis Results | |
---|---|---|---|
Absolute Value | Normalized Value | ||
CQUAD4 | 1.754E-03 | 1.895E-03 | 1.0804 |
CTRIA3 | 1.802E-03 | 1.0274 | |
CHEXA8 | 1.793E-03 | 1.022 | |
CTETRA10 | 1.790E-03 | 1.020 |
Model Files
The model files used in this problem include:
- /CHEXA8.fem
- /CQUAD4.fem
- /CTETRA10.fem
- /CTRIA3.fem
Reference
MacNeal, R.H., and Harder, R.L., A Proposed Standard Set of Problems to Test Finite Element Accuracy, Finite Elements in Analysis and Design, 1 (1985) 3-20.