My STEP:
*STEP, INC = 3000, NAME = Step-3, NLGEOM = YES *VISCO, CETOL = 0.05 , STABILIZE =2.0000E-04, ALLSDTOL = 0.05 1.0000E-03, 1.0,1.0000E-15, 0.005 *CONTACT CONTROLS, STABILIZE
And this is the interation infomation in .msg file:
CONVERGENCE CHECKS FOR EQUILIBRIUM ITERATION 5
MAX. PENETRATION ERROR 59.5408E-06 AT NODE 6474224 OF CONTACT PAIR
(CSURF_TOP-COVER-PORON_4,CSURF_AMOLED16-PATTERN_19)
MAX. CONTACT FORCE ERROR 10.5187E-06 AT NODE 6474224 OF CONTACT PAIR
(CSURF_TOP-COVER-PORON_4,CSURF_AMOLED16-PATTERN_19)
THE CONTACT CONSTRAINTS HAVE CONVERGED.
AVERAGE FORCE 5.743E-02 TIME AVG. FORCE 5.743E-02
LARGEST RESIDUAL FORCE -5.210E-07 AT NODE 27194 DOF 1
LARGEST INCREMENT OF DISP. -2.747E-02 AT NODE 114399 DOF 1
LARGEST CORRECTION TO DISP. -4.446E-05 AT NODE 6474224 DOF 1
THE FORCE EQUILIBRIUM EQUATIONS HAVE CONVERGED
AVERAGE MOMENT 1.977E-03 TIME AVG. MOMENT 1.977E-03
LARGEST RESIDUAL MOMENT 1.965E-07 AT NODE 6476799 DOF 5
LARGEST INCREMENT OF ROTATION -4.777E-04 AT NODE 6473769 DOF 5
LARGEST CORRECTION TO ROTATION 5.806E-09 AT NODE 193333 DOF 5
THE MOMENT EQUILIBRIUM EQUATIONS HAVE CONVERGED
COMPATIBILITY ERRORS:
TYPE NUMBER EXCEEDING TOLERANCE MAXIMUM ERROR IN ELEMENT
VOLUMETRIC 0 2.983E-11 12299027
ASYNCHRONOUS TRACKING ELEMENT LOOP STARTED
CONVERGENCE CHECKS FOR EQUILIBRIUM ITERATION 6
MAX. PENETRATION ERROR -241.712E-06 AT NODE 6474224 OF CONTACT PAIR
(CSURF_TOP-COVER-PORON_4,CSURF_AMOLED16-PATTERN_19)
MAX. CONTACT FORCE ERROR -50.7683E-06 AT NODE 6474224 OF CONTACT PAIR
(CSURF_TOP-COVER-PORON_4,CSURF_AMOLED16-PATTERN_19)
PENETRATION ERROR TOO LARGE COMPARED TO DISPLACEMENT INCREMENT.
AVERAGE FORCE 5.743E-02 TIME AVG. FORCE 5.743E-02
LARGEST RESIDUAL FORCE -9.266E-07 AT NODE 6476799 DOF 3
LARGEST INCREMENT OF DISP. -2.747E-02 AT NODE 114399 DOF 1
LARGEST CORRECTION TO DISP. -4.446E-05 AT NODE 6474224 DOF 1
THE FORCE EQUILIBRIUM EQUATIONS HAVE CONVERGED
AVERAGE MOMENT 1.976E-03 TIME AVG. MOMENT 1.976E-03
LARGEST RESIDUAL MOMENT 1.360E-06 AT NODE 6476799 DOF 5
LARGEST INCREMENT OF ROTATION -4.777E-04 AT NODE 6473769 DOF 5
LARGEST CORRECTION TO ROTATION 5.806E-09 AT NODE 193333 DOF 5
THE MOMENT EQUILIBRIUM EQUATIONS HAVE CONVERGED
COMPATIBILITY ERRORS:
TYPE NUMBER EXCEEDING TOLERANCE MAXIMUM ERROR IN ELEMENT
VOLUMETRIC 0 8.716E-11 12299027
It indicates that the constarints and all fields converge in EQUILIBRIUM ITERATION 5, but ABAQUS/STANDARD continues the interation. This is so wield for me.
Has anyone encountered this situation before? Any comment is valuable!
