About the Crane Hook Example

Tosca Structure.morph allows the easy setup and analysis of model variants. Morphing areas are defined through groups of surface nodes.

This page discusses:

About the Model

Task morphing (creation of model variants)
Options morphing displacement, morphing area
Commands MORPH_AREA, MORPH

In this crane hook example, the maximum stresses for both load cases are in an area that cannot be modified, for example, by a shape optimization. The outer side of the crane hook can be modified to reduce the stresses on the inner side:



Load case definition for load case 1 and 2



Stress distribution for load case 1 and 2

Tosca Structure.morph is used to examine model variants where areas on the outer side of the crane hook are modified. These morphing areas Morphing_1, ... Morphing_7 as well as the critical area (= with high stresses) are defined as groups as shown in the following figure in your preprocessor:



Critical area(left) and morphing areas (right)

The morphing areas are then modified, based on the user-defined design of experiment. In this experiment plan a constant displacement (positive, negative or zero) for each morphing area is defined. The modified model is analyzed by your FE solver.

Procedure Summary

Model: cranehook_morph.ext
Design Area: DESIGN_NODES (combination of all MORPH_AREAs)
Mesh Smooth: Three layers based on DESIGN_NODES
Design Variable Constraint: Plane symmetry restriction
Objective: Minimize the stresses in the critical area
Morphing: Morph the morphing area with the experiment plan cranehook_morph.csv