** This test verifies energy type damage evolution with linear ** softening considering energy mode mix measure. ** The following have been incorporated in the test: ** 1. Uncoupled modes => *ELASTIC, TYPE=TRACTION ** 2. DAMAGE INITIATION CRITERION = MAXE ** 3. Deformation in each test case is considered either purely normal ** (Mode 1) or purely in the first (Mode 2) or second (Mode 3) shear ** direction. ** 4. No temperature dependence ** 5. Isotropic shear behavior ** 6. Thickness direction = Global 2 direction ** 7. Thickness = 1.0 => Nominal strain = Separation *HEADING Damage test for COH3D6 *PREPRINT, MODEL=YES **##################################### **TEST CASE I: PURE TENSILE (MODE 1) **TEST CASE II: SIMPLE SHEAR (MODE 2) **TEST CASE III: SIMPLE SHEAR (MODE 3) **##################################### *NODE, NSET=SPEC1_MODE1 11, 0., 0., 0. 12, 1., 0., 0. 13, 1., 0., 1. 14, 0., 0., 1. 15, 0., 1., 0. 16, 1., 1., 0. 17, 1., 1., 1. 18, 0., 1., 1. *SYSTEM 2, 0, 0 *NODE, NSET=SPEC1_MODE2 21, 0., 0., 0. 22, 1., 0., 0. 23, 1., 0., 1. 24, 0., 0., 1. 25, 0., 1., 0. 26, 1., 1., 0. 27, 1., 1., 1. 28, 0., 1., 1. *SYSTEM 4, 0, 0 *NODE, NSET=SPEC1_MODE3 31, 0., 0., 0. 32, 1., 0., 0. 33, 1., 0., 1. 34, 0., 0., 1. 35, 0., 1., 0. 36, 1., 1., 0. 37, 1., 1., 1. 38, 0., 1., 1. *NSET, NSET=SPEC1_MODE1_TOP 15, 16, 17, 18 *NSET, NSET=SPEC1_MODE1_BOT 11, 12, 13, 14 *NSET, NSET=SPEC1_MODE2_TOP 25, 26, 27, 28 *NSET, NSET=SPEC1_MODE2_BOT 21, 22, 23, 24 *NSET, NSET=SPEC1_MODE3_TOP 35, 36, 37, 38 *NSET, NSET=SPEC1_MODE3_BOT 31, 32, 33, 34 *ELEMENT, TYPE=COH3D6, ELSET=SPEC1_MODE1 11, 14, 13, 11, 18, 17, 15 12, 12, 11, 13, 16, 15, 17 *ELEMENT, TYPE=COH3D6, ELSET=SPEC1_MODE2 21, 24, 23, 21, 28, 27, 25 22, 22, 21, 23, 26, 25, 27 *ELEMENT, TYPE=COH3D6, ELSET=SPEC1_MODE3 31, 34, 33, 31, 38, 37, 35 32, 32, 31, 33, 36, 35, 37 *ELSET, ELSET=EALL_TAB SPEC1_MODE1, SPEC1_MODE2, SPEC1_MODE3 ** *COHESIVE SECTION, RESPONSE=TRACTION SEPARATION, ELSET=EALL_TAB, MATERIAL=COH_TAB *MATERIAL, NAME=COH_TAB *ELASTIC,TYPE=TRACTION 4.0E6,2.0E6,2.0E6 *DAMAGE INITIATION, CRITERION=MAXE 0.002, 0.001, 0.001 *DAMAGE EVOLUTION, TYPE=ENERGY, MODE MIX RATIO=ENERGY, MIXED MODE BEHAVIOR=TABULAR, SOFTENING=LINEAR 32.0, 0.0 8.0, 1.0 *DENSITY 100. ** **##################################### **TEST CASE IV: PURE TENSILE (MODE 1) **TEST CASE V: SIMPLE SHEAR (MODE 2) **TEST CASE VI: SIMPLE SHEAR (MODE 3) **##################################### *SYSTEM 0, 2, 0 *NODE, NSET=SPEC2_MODE1 41, 0., 0., 0. 42, 1., 0., 0. 43, 1., 0., 1. 44, 0., 0., 1. 45, 0., 1., 0. 46, 1., 1., 0. 47, 1., 1., 1. 48, 0., 1., 1. *SYSTEM 2, 2, 0 *NODE, NSET=SPEC2_MODE2 51, 0., 0., 0. 52, 1., 0., 0. 53, 1., 0., 1. 54, 0., 0., 1. 55, 0., 1., 0. 56, 1., 1., 0. 57, 1., 1., 1. 58, 0., 1., 1. *SYSTEM 4, 2, 0 *NODE, NSET=SPEC2_MODE3 61, 0., 0., 0. 62, 1., 0., 0. 63, 1., 0., 1. 64, 0., 0., 1. 65, 0., 1., 0. 66, 1., 1., 0. 67, 1., 1., 1. 68, 0., 1., 1. *NSET, NSET=SPEC2_MODE1_TOP 45, 46, 47, 48 *NSET, NSET=SPEC2_MODE1_BOT 41, 42, 43, 44 *NSET, NSET=SPEC2_MODE2_TOP 55, 56, 57, 58 *NSET, NSET=SPEC2_MODE2_BOT 51, 52, 53, 54 *NSET, NSET=SPEC2_MODE3_TOP 65, 66, 67, 68 *NSET, NSET=SPEC2_MODE3_BOT 61, 62, 63, 64 *ELEMENT, TYPE=COH3D6, ELSET=SPEC2_MODE1 41, 44, 43, 41, 48, 47, 45 42, 42, 41, 43, 46, 45, 47 *ELEMENT, TYPE=COH3D6, ELSET=SPEC2_MODE2 51, 54, 53, 51, 58, 57, 55 52, 52, 51, 53, 56, 55, 57 *ELEMENT, TYPE=COH3D6, ELSET=SPEC2_MODE3 61, 64, 63, 61, 68, 67, 65 62, 62, 61, 63, 66, 65, 67 *ELSET, ELSET=EALL_POWER SPEC2_MODE1, SPEC2_MODE2, SPEC2_MODE3 ** *COHESIVE SECTION, RESPONSE=TRACTION SEPARATION, ELSET=EALL_POWER, MATERIAL=COH_POWER *MATERIAL, NAME=COH_POWER *ELASTIC,TYPE=TRACTION 4.0E6,2.0E6,2.0E6 *DAMAGE INITIATION, CRITERION=MAXE 0.002, 0.001, 0.001 *DAMAGE EVOLUTION, TYPE=ENERGY, MODE MIX RATIO=ENERGY, MIXED MODE BEHAVIOR=POWER, SOFTENING=LINEAR, POWER=1.5 32.0, 8.0, 8.0 *DENSITY 100. **##################################### **TEST CASE VII: PURE TENSILE (MODE 1) **TEST CASE VIII: SIMPLE SHEAR (MODE 2) **TEST CASE IX: SIMPLE SHEAR (MODE 3) **##################################### *SYSTEM 0, 4, 0 *NODE, NSET=SPEC3_MODE1 71, 0., 0., 0. 72, 1., 0., 0. 73, 1., 0., 1. 74, 0., 0., 1. 75, 0., 1., 0. 76, 1., 1., 0. 77, 1., 1., 1. 78, 0., 1., 1. *SYSTEM 2, 4, 0 *NODE, NSET=SPEC3_MODE2 81, 0., 0., 0. 82, 1., 0., 0. 83, 1., 0., 1. 84, 0., 0., 1. 85, 0., 1., 0. 86, 1., 1., 0. 87, 1., 1., 1. 88, 0., 1., 1. *SYSTEM 4, 4, 0 *NODE, NSET=SPEC3_MODE3 91, 0., 0., 0. 92, 1., 0., 0. 93, 1., 0., 1. 94, 0., 0., 1. 95, 0., 1., 0. 96, 1., 1., 0. 97, 1., 1., 1. 98, 0., 1., 1. *NSET, NSET=SPEC3_MODE1_TOP 75, 76, 77, 78 *NSET, NSET=SPEC3_MODE1_BOT 71, 72, 73, 74 *NSET, NSET=SPEC3_MODE2_TOP 85, 86, 87, 88 *NSET, NSET=SPEC3_MODE2_BOT 81, 82, 83, 84 *NSET, NSET=SPEC3_MODE3_TOP 95, 96, 97, 98 *NSET, NSET=SPEC3_MODE3_BOT 91, 92, 93, 94 *ELEMENT, TYPE=COH3D6, ELSET=SPEC3_MODE1 71, 74, 73, 71, 78, 77, 75 72, 72, 71, 73, 76, 75, 77 *ELEMENT, TYPE=COH3D6, ELSET=SPEC3_MODE2 81, 84, 83, 81, 88, 87, 85 82, 82, 81, 83, 86, 85, 87 *ELEMENT, TYPE=COH3D6, ELSET=SPEC3_MODE3 91, 94, 93, 91, 98, 97, 95 92, 92, 91, 93, 96, 95, 97 *ELSET, ELSET=EALL_BK SPEC3_MODE1, SPEC3_MODE2, SPEC3_MODE3 ** *COHESIVE SECTION, RESPONSE=TRACTION SEPARATION, ELSET=EALL_BK, MATERIAL=COH_BK *MATERIAL, NAME=COH_BK *ELASTIC,TYPE=TRACTION 4.0E6,2.0E6,2.0E6 *DAMAGE INITIATION, CRITERION=MAXE 0.002, 0.001, 0.001 *DAMAGE EVOLUTION, TYPE=ENERGY, MODE MIX RATIO=ENERGY, MIXED MODE BEHAVIOR=BK, SOFTENING=LINEAR, POWER=1.5 32.0, 8.0, 8.0 *DENSITY 100. ** *NSET, NSET=NALL_BOT SPEC1_MODE1_BOT, SPEC1_MODE2_BOT, SPEC1_MODE3_BOT, SPEC2_MODE1_BOT, SPEC2_MODE2_BOT, SPEC2_MODE3_BOT, SPEC3_MODE1_BOT, SPEC3_MODE2_BOT, SPEC3_MODE3_BOT *BOUNDARY NALL_BOT, 1, 3 SPEC1_MODE1_TOP, 1, 1 SPEC1_MODE1_TOP, 3, 3 SPEC1_MODE2_TOP, 2, 3 SPEC1_MODE3_TOP, 1, 2 SPEC2_MODE1_TOP, 1, 1 SPEC2_MODE1_TOP, 3, 3 SPEC2_MODE2_TOP, 2, 3 SPEC2_MODE3_TOP, 1, 2 SPEC3_MODE1_TOP, 1, 1 SPEC3_MODE1_TOP, 3, 3 SPEC3_MODE2_TOP, 2, 3 SPEC3_MODE3_TOP, 1, 2 *ELSET, ELSET=QA_TEST_EALL EALL_TAB, EALL_POWER, EALL_BK *NSET, NSET=QA_TEST_NALL_TOP SPEC1_MODE1_TOP, SPEC1_MODE2_TOP, SPEC1_MODE3_TOP, SPEC2_MODE1_TOP, SPEC2_MODE2_TOP, SPEC2_MODE3_TOP, SPEC3_MODE1_TOP, SPEC3_MODE2_TOP, SPEC3_MODE3_TOP **##################################### **STATIC STEP **##################################### *STEP, INC=1000 *STATIC 0.001, 1.0, 1.0E-5, 0.01 *BOUNDARY SPEC1_MODE1_TOP, 2, 2, 0.01 SPEC1_MODE2_TOP, 1, 1, 0.01 SPEC1_MODE3_TOP, 3, 3, 0.01 SPEC2_MODE1_TOP, 2, 2, 0.01 SPEC2_MODE2_TOP, 1, 1, 0.01 SPEC2_MODE3_TOP, 3, 3, 0.01 SPEC3_MODE1_TOP, 2, 2, 0.01 SPEC3_MODE2_TOP, 1, 1, 0.01 SPEC3_MODE3_TOP, 3, 3, 0.01 *OUTPUT, FIELD *ELEMENT OUTPUT, ELSET=QA_TEST_EALL S, E, SDEG, DMICRT, STATUS *NODE OUTPUT, NSET=QA_TEST_NALL_TOP U, RF *OUTPUT, HISTORY *ELEMENT OUTPUT, ELSET=QA_TEST_EALL S, E, SDEG, DMICRT, STATUS *ENERGY OUTPUT, ELSET=SPEC1_MODE1 ALLSE, ALLKE, ALLDMD, ALLIE *ENERGY OUTPUT, ELSET=SPEC1_MODE2 ALLSE, ALLKE, ALLDMD, ALLIE *ENERGY OUTPUT, ELSET=SPEC1_MODE3 ALLSE, ALLKE, ALLDMD, ALLIE *ENERGY OUTPUT, ELSET=SPEC2_MODE1 ALLSE, ALLKE, ALLDMD, ALLIE *ENERGY OUTPUT, ELSET=SPEC2_MODE2 ALLSE, ALLKE, ALLDMD, ALLIE *ENERGY OUTPUT, ELSET=SPEC2_MODE3 ALLSE, ALLKE, ALLDMD, ALLIE *ENERGY OUTPUT, ELSET=SPEC3_MODE1 ALLSE, ALLKE, ALLDMD, ALLIE *ENERGY OUTPUT, ELSET=SPEC3_MODE2 ALLSE, ALLKE, ALLDMD, ALLIE *ENERGY OUTPUT, ELSET=SPEC3_MODE3 ALLSE, ALLKE, ALLDMD, ALLIE *ENERGY OUTPUT ETOTAL, ALLWK *END STEP