Hi Sahil,
Thanks for you reply. The material I used is linear material as shown in the image below.
I did turn on the large deflection and auto time stepping option. I add more time steps as you mentioned, but it still shows error like this. It seems that my contact regions has some problem, but I don't know why this happened. If I change the rubber thickness from 1/16 inch to 2 inches, there's no error.
*** ERROR *** CP = 3.891 TIME= 16:56:20
Element 10417 has excessive thickness change.
*** LOAD STEP 1 SUBSTEP 1 NOT COMPLETED. CUM ITER = 2
*** BEGIN BISECTION NUMBER 1 NEW TIME INCREMENT= 7.0000
*** NOTE *** CP = 3.891 TIME= 16:56:20
Predictor is ON by default for structural elements with rotational
degrees of freedom. Use the PRED,OFF command to turn the predictor
OFF if it adversely affects the convergence.
*************************************************
SUMMARY FOR CONTACT PAIR IDENTIFIED BY REAL CONSTANT SET 28
*** NOTE *** CP = 4.969 TIME= 16:56:21
Contact pair is inactive.
*************************************************
SUMMARY FOR CONTACT PAIR IDENTIFIED BY REAL CONSTANT SET 29
*** NOTE *** CP = 4.969 TIME= 16:56:21
No contact was detected.
Max. Pinball distance 6.093701855E-03.
One of the contact searching regions contains at least 8 target
elements.
*************************************************
*************************************************
SUMMARY FOR CONTACT PAIR IDENTIFIED BY REAL CONSTANT SET 30
*** NOTE *** CP = 4.969 TIME= 16:56:21
Contact pair is inactive.
*************************************************
SUMMARY FOR CONTACT PAIR IDENTIFIED BY REAL CONSTANT SET 31
*** NOTE *** CP = 4.969 TIME= 16:56:21
No contact was detected.
Max. Pinball distance 6.093701855E-03.
One of the contact searching regions contains at least 8 target
elements.
*************************************************
*************************************************
One of the contact searching regions contains at least 220 target
elements. You may reduce the pinball radius (current value
9.972265941E-03) for contact pair identified by real constant set 40
to speed up contact searching.
Range of element maximum matrix coefficients in global coordinates
Maximum = 6781141.29 at element 16858.
Minimum = 12160.5806 at element 8110.
FORCE CONVERGENCE VALUE = 1.634 CRITERION= 0.8334E-02
MOMENT CONVERGENCE VALUE = 0.3343E-12 CRITERION= 0.5102E-04
SPARSE MATRIX DIRECT SOLVER.
Number of equations = 97485, Maximum wavefront = 60
Memory allocated for solver = 312.443 MB
Memory required for in-core solution = 299.944 MB
Memory required for out-of-core solution = 116.053 MB
*** NOTE *** CP = 5.234 TIME= 16:56:21
The Sparse Matrix Solver is currently running in the in-core memory
mode. This memory mode uses the most amount of memory in order to
avoid using the hard drive as much as possible, which most often
results in the fastest solution time. This mode is recommended if
enough physical memory is present to accommodate all of the solver
data.
curEqn= 84522 totEqn= 97485 Job CP sec= 5.562
Factor Done= 68% Factor Wall sec= 0.000 rate= 0.0 GFlops
curEqn= 97485 totEqn= 97485 Job CP sec= 5.578
Factor Done= 100% Factor Wall sec= 0.030 rate= 424.3 GFlops
Sparse solver maximum pivot= 9636186.61 at node 1650 UY.
Sparse solver minimum pivot= 1.425333714E-04 at node 7549 ROTY.
Sparse solver minimum pivot in absolute value= 1.425333714E-04 at node
7549 ROTY.
DISP CONVERGENCE VALUE = 8.242 CRITERION= 0.4205
EQUIL ITER 1 COMPLETED. NEW TRIANG MATRIX. MAX DOF INC= 22.82
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