Creation of CCX *SPRING

Tim_Gowing

Victor,
I frequently use linear springs in my CCX models to ensure constraint and alignment of assemblies containing contact, but perhaps without friction. An example may be a component with a bore into with a sleeve is installed with an interference fit. The addition of friction can increase the solution time, and a reasonable simulation may perhaps be obtained without friction. The problem is how to constrain the sleeve so that it doesn't float axially or rotate about the axis, when the component has general displacement; here it is convenient to attach weak springs to couple the two components.
The CCX *SPRING is a 2-node element. Can this be created in Mecway currently? Can a 'line2' element be manipulated via custom model definition/don't generate keywords?
The CCX example input file spring1.inp is listed below.
Tim

**
** Structure: spring.
** Test objective: static calculation of a linear spring.
**
*NODE,NSET=NALL
1,0.,0.,0.
2,1.,0.,0.
*ELEMENT,TYPE=SPRINGA,ELSET=EALL
1,1,2
*BOUNDARY
1,1,3
2,2,3
*SPRING,ELSET=EALL

10.
*STEP,NLGEOM
*STATIC
*CLOAD
2,1,1.
*NODE PRINT,NSET=NALL
U
*END STEP

Victor

Yep, you can use the spring-damper mechanical material type on a line2 element in Mecway to make a SPRINGA element for CCX as shown in the attachment.