29.2. Problem Description

Since the geometry and the loads for the model have cyclic symmetry, a 1° sector of the full geometry is modeled under the assumption that the thermal and structural solutions are axisymmetric. 3-D solid elements with the capability to model layers are used.

A steady-state thermal analysis is performed using a homogeneous material option, followed by an analysis using the 4-layer material option. The temperature solution from these analyses serve as thermal loads for a static structural analysis (both homogeneous and 4-layer material option). Ansys Composite PrepPost is used to define the composite layered material that the Nozzle and Ring are composed of (see Use of Ansys Composite PrepPost to Model Composite Layers). The Workbench project schematic below shows the workflow. A total of four structural solutions will be obtained.

Figure 29.1: Project Schematic in Workbench

Project Schematic in Workbench

To ensure an axisymmetric solution for the thermal run, the temperature is constrained to be the same along the theta direction. Axisymmetric DOF constraints are specified to ensure an axisymmetric solution for the structural run.