** Test to verify damage evolution independent of mode mix. 
*HEADING
  Damage evolution independent of mode mix
*PREPRINT, MODEL=YES
**
*PART, NAME=SPEC1
*NODE
11, 1., 0.
12, 2., 0.
13, 2., 1.
14, 1., 1.
*NSET, NSET=FRONT
12, 13
*NSET, NSET=BACK
11, 14
*ELEMENT, TYPE=COHAX4, ELSET=EALL
11, 11, 12, 13, 14
*COHESIVE SECTION, RESPONSE=TRACTION SEPARATION, ELSET=EALL, MATERIAL=COH_DISP, STACK DIRECTION=1
*END PART
**
**###########################################################
**INSTANCE I: PURE TENSILE (MODE 1)
**INSTANCE II: SIMPLE SHEAR (MODE 2)
**###########################################################
*ASSEMBLY, NAME=SPEC_ASSY
*INSTANCE, NAME=SPEC1_MODE1, PART=SPEC1
0., 0., 0.
*END INSTANCE
*INSTANCE, NAME=SPEC1_MODE2, PART=SPEC1
0., 2., 0.
*END INSTANCE
*NSET, NSET=NALL_BACK
SPEC1_MODE1.BACK, SPEC1_MODE2.BACK
*NSET, NSET=QA_TEST_NALL_FRONT
SPEC1_MODE1.FRONT, SPEC1_MODE2.FRONT
*ELSET, ELSET=QA_TEST_EALL
SPEC1_MODE1.EALL, SPEC1_MODE2.EALL
*END ASSEMBLY
**
*MATERIAL, NAME=COH_DISP
*ELASTIC,TYPE=TRACTION
4.0E6, 2.0E6, 2.0E6
*DAMAGE INITIATION, CRITERION=MAXS
8000., 2000.
*DAMAGE EVOLUTION, TYPE=DISPLACEMENT, SOFTENING=LINEAR
0.006
*DENSITY
100.
**
*BOUNDARY
NALL_BACK, 1, 2
SPEC1_MODE1.FRONT, 2, 2
SPEC1_MODE2.FRONT, 1, 1
**#####################################
**DYNAMIC, EXPLICIT  STEP
**#####################################
*STEP
*DYNAMIC, EXPLICIT
, 1.0
*BOUNDARY, TYPE=VELOCITY
SPEC1_MODE1.FRONT, 1, 1, 0.01
SPEC1_MODE2.FRONT, 2, 2, 0.01
*OUTPUT, FIELD, NUMBER INTERVAL=20, TIME MARKS=YES
*ELEMENT OUTPUT, ELSET=QA_TEST_EALL
S, SDEG, LE, NE, DMICRT, STATUS
*NODE OUTPUT, NSET=QA_TEST_NALL_FRONT
U, RF
*OUTPUT, HISTORY, TIME INTERVAL=0.01
*ELEMENT OUTPUT, ELSET=QA_TEST_EALL
S, SDEG, LE, NE, DMICRT, STATUS
*END STEP