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In a dynamic system consisting of only rigid bodies and including contact elements, rigid bodies connected to specific contact elements can be easily converted into flexible bodies for simulation. This is one of the key advantages of RecurDyn's MFBD (Multi-Flexible Body Dynamics) technology.
First, contact elements in a rigid body system use Geo Contacts. For more information on Geo Contact, please refer to the link below.
If you use RecurDyn V8R5 or later versions, you can use the G-Modeling feature to simplify the following process.
First, with the Geo Surface Contact defined in the figure below, select the body on which the Mesh operation will be performed to convert into an FFlex body, and run Mesher through the right-click menu.
Click the Assist icon in the Mesher group In the top menu, and click the Assist Modeling icon. The Assist Modeling function allows for the automatical settings of the elements required for maintaining Contact and Joints during the Mesh operations.
If you select the target body as the body on which the Mesh operation will be performed In the Assist Modeling Properties window, the ‘Preserve Constraint’ and ‘Pre-Create Patch (Line) Set & Preserve Contact’ options are automatically set. Click ‘OK’ to close the Assist Modeling Properties window and then click the Mesh icon for mesh operation with the desired element and size.
In such cases, it is necessary to check the ‘Include Assist Modeling’ option to maintain Contacts and Joints.
After completing the mesh operation, exit the Mesher function. Then, you can see that both Joints and Contacts are maintained, and the simulation can be executed immediately.
