DesignModeler-Mid Surface Creation

Goal

– Familiarize users with mid-surface capabilities

– Demonstrate manual and automatic pair detection

– Demonstrate surface extension for interfaces

Model Description

– 2 part bracket with consistent cross sections

– Since the model has consistent cross sections, shell elements will be used to mesh the model. This saves time and CPU resources.

Project Page> Component Systems> Geometry

Project Page> Component Systems> Geometry

DM will Open. When prompted choose “mm” as the length unit

Import the Parasolids file “bracket_mid_surface.x_t”

1. [Main menu] >File> Import External Geometry File . . . Browse to file “bracket_mid_surface.x_t” and open.
2. “Generate” the import.

In the Model Tree, note that there are 2 separate parts:

1. Each body of this model has different thicknesses. These thickness dimensions will be entered into the Maximum Threshold and Minimum Threshold fields in the Details of the MidSurf object.
   Menu Bar > Selection Filter – Edges.
   Use the status bar measuring tools to verify these thicknesses.

1. Insert a mid-surface object Main Menu > Tools > Mid-Surface

1. In the Details of MidSurf1, change the Selection Method to Automatic

1. Enter the Minimum Threshold of 1mm and Maximum Threshold of 2mm obtained from step 3.

1. Set “Find Face Pairs Now?” to “Yes”

1. The Face Pair Automatic Selection method will select 11 face pairs. However, the automatic selection method has incorrectly identified the following features:

a) A face pair that is not needed.
b) A face pair whereby the normal will need to be reversed

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