Rigid Link geometrically constrains the relative movements between the Master and Slave Nodes without being affected by large stiffness of other members. Therefore, when the model contains an element, which has large stiffness to replicate a rigid action, it is recommended that Rigid Link be used rather than Rigid Type Elastic Link. Such exceptionally large stiffness may cause a numerical error because of the relatively large stiffness of the link element. Rigid type Elastic Link vs Rigid Link In case of Rigid Type Elastic Link, the element stiffness is automatically calculated based on the working model, assigning a large stiffness value of magnitude 105~108 times the stiffness of neighboring elements. However, the user must be cautious in using them because their internal processes are different in the program RIGID LINK ELASTIC LINK 1. Rigid Type of Elastic Link and Rigid Link are similar in that both are used to simulate rigid behavior.
While an Elastic link connects two nodes to act as an element, where the user defines its stiffness. In this case, relative nodal displacements are kept constant. The relative movements of the master node and slave nodes are such as if they are interconnected by a three dimensional rigid body.
How is it different from defining the link as Rigid Link Rigid link constraints geometric, relative movement of a structure, where degrees of freedom of subordinated nodes called Slave Nodes are constraint by a particular reference node called Master Node. When defining a elastic link, under certain conditions Rigid type Elastic link may be defined.
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