OS-E: 0845 Control Arm with Local Stress Constraint
Demonstrates the use of Stress Constraint in Topology Optimization on a control arm.
The finite element mesh containing designable (red) and non-designable regions (brown) is
shown in Figure 1.
Model Files
Before you begin, copy the file(s) used in this example to
your working directory.
Model Description
Topology optimization of control arm is solved for:
- Analysis Type
- Linear Static
- SPC
- Optimization
- Topology
- Objective: Min Volume
New stress responses for Topology and Free-Size optimization can be defined via the DRESP1 Bulk Data Entry. The Stress Responses are internally aggregated using the Stress-NORM approach to maintain the number of created responses at a reasonable number.
The Stress-NORM method is used to approximately calculate the maximum value of the stresses
of all the elements included in a particular response. This is also scaled with the stress
bounds specified for each element. Therefore, to minimize the maximum stresses in a
particular element set, the resulting Stress NORM value is internally constrained to a value
lower than 1.0. For more information on the Stress-NORM method, refer to the
DRESP1 Bulk Data Entry in the Reference Guide.
- FE Model
- Elements Types
- CTETRA
The linear material properties are:
- MAT1
- Young’s Modulus
- 1.6E5 MPa
- Poisson's Ratio
- 0.25
- Initial Density
- 7.1E-9 Mg/mm3