# OS-E: 0835 Failsafe Topology Optimization of 3D Column

Demonstrates Failsafe topology optimization of a 3D column, using OptiStruct.

FSO divides the structure into damage zones and generates multiple models (equal to the
number of failure zones), wherein each model is the same as the original model minus one
failure zone. In this process, the FSO method is applied by running Topology Optimization
simultaneously for all such generated models and a final design is output which is optimized
to account for all generated models.

Note: If the number of damage zones is large, which
means the number of SPMD domains is high. Such a job typically requires
to be run on multiple nodes with cluster setup.

## Model Files

Before you begin, copy the file(s) used in this example to
your working directory.

## Model Description

Conduct a FSO topology optimization of the 2D plate which is undergoing a compression
loading (force applied in negative Z-direction). The design space is shown in green in Figure 1. The column is modeled using first order Hexa elements.

- Objective
- Minimize the compliance
- Constrains
- Minimize 30% of the volume
- Design Variables
- Topology Design Variable

## Results

Regular Topology optimization runs may not account for the feasibility of a design in
situations where a section of the structure fails, and the regular topology optimization
design fails even if one column fails. However, with FSO that is not case.