Are there any examples of using the GAP and FSLIDE features of COMBIN40 elements?
|
Yes, please see the attached ANSYS 10.0 SP1 example. The model consists of a single COMBIN40 element. The order of the nodal connectivity determines how the element will behave, based on the nodal coordinate system. In this example, three cases were analyzed: 1) no initial gap, 2) an initial gap, and 3) an initial interference. In all three, a cut-off value (FSLIDE) of 10 force units was included. The results seem to make sense. In the first case (no initial gap), FSLIDE is reached at 0.1 displacement units (10 = 100 * 0.1). For the next case (0.05 gap), node 2 must move 0.25 units before the element stiffness kicks in. For the last case, (0.05 initial interference), there is already a preload built in, so a very short travel distance reaches the FSLIDE value in the element. The reaction load is shown below for each case. . No Initial Gap TIME 2 FX n2rfx 0.10000 2.00000 0.20000 4.00000 0.30000 6.00000 0.40000 8.00000 0.50000 10.0000 0.60000 10.0000 0.70000 10.0000 0.80000 10.0000 0.90000 10.0000 1.0000 10.0000 . Initial Gap = 0.05 (positive gap) TIME 2 FX n2rfx 0.10000 0.00000 0.20000 0.00000 0.30000 1.00000 0.40000 3.00000 0.50000 5.00000 0.60000 7.00000 0.70000 9.00000 0.80000 10.0000 0.90000 10.0000 1.0000 10.0000 . Initial Interference = -0.05 (negative gap) TIME 2 FX n2rfx 0.10000 7.00000 0.20000 9.00000 0.30000 10.0000 0.40000 10.0000 0.50000 10.0000 0.60000 10.0000 0.70000 10.0000 0.80000 10.0000 0.90000 10.0000 1.0000 10.0000 . |
||
|