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Abaqus中接触分析(显示求解 Explicit)

目录

  1. 引言
  2. 通用接触通用接触(general contact)
  3. 接触对(contact pair)

引言

  与隐式求解(Abaqus中接触分析(隐式求解Standard))中接触类似,显示求解中接触类型主要分为两类:

  • 通用接触(general contact)
  • 接触对(contact pair)

通用接触(general contact)

  显式中通用接触的关键字同样为*CONTACT,具体信息如下,*CONTACT INCLUSIONS表示设置需要接触的区域,而ALL EXTERIOR参数表示设置整个模型为接触区域。

*CONTACT
**定义整个模型为自接触
*CONTACT INCLUSIONS, ALL EXTERIOR

  对于排除无需设置接触区域,使用关键字*CONTACT EXCLUSIONS排除该区域,具体信息如下:

*CONTACT
*CONTACT INCLUSIONS, ALL EXTERIOR
**排除无需设置接触的区域
*CONTACT EXCLUSIONS, surface_2

  在定义局部接触区域时,可直接定义目标区域的接触;在设置目标区域的接触前,需要通过*SURFACE,  TYPE = ELEMENT,NAME = Contact_Surface_Name,关键字信息如下:

**定义接触面
*Surface, NAME = Contact_Surface_Name01, TYPE = ELEMENT
...
*Surface, NAME = Contact_Surface_Name02, TYPE = ELEMENT
...
*CONTACT
*CONTACT INCLUSIONS
Contact_Surface_Name01, Contact_Surface_Name02

通用接触的属性定义

 显式中的通用接触的属性定义的关键字如下,*CONTACT PROPERTY ASSIGNMENT关键字设置接触的属性,定义摩擦属性的关键字为*SURFACE INTERACTION和*FRICTION。

*SURFACE INTERACTION, NAME=contProp1
*FRICTION
0.1
*SURFACE INTERACTION, NAME=contProp2
*FRICTION
0.15
*SURFACE INTERACTION, NAME=contProp3
*FRICTION
0.20
*CONTACT
*CONTACT INCLUSIONS, ALL EXTERIOR
**定义整个模型的接触属性
*CONTACT PROPERTY ASSIGNMENT, , contProp1 **定义目标接触区的属性
surf1, surf1, contProp2 
**定义目标接触区无属性
surf2, surf3,, surf4, contProp3

通用接触中问题分析

  在显式计算中,定义接触的关键字后,可直接提交计算获取结果。虽然计算中不存在收敛的问题,但是显示计算中会因为模型设置的问题,导致求解的结果误差增大。

  针对模型之间出现的间隙(GAP)穿透(OVERCLOSURE)问题,同样可通过设置关键字(INP文件中修改)在初始接触状态消除这些情况,*CONTACT CLEARANCE关键字设置处理初始接触的算法,*CONTACT CLEARANCE ASSIGNMENT关键字指定目前接触区域使用的算法,关键字信息如下:

**指定调整初始接触和穿透间距
*CONTACT CLEARANCE, NAME=c2, ADJUST=YES, SEARCH BELOW=1.5,
SEARCH ABOVE=0.0
...
*CONTACT
*CONTACT CLEARANCE ASSIGNMENT
surf3, surf4, c2

  其中*CONTACT CLEARANCE关键字的使用不会产生额外的应力和应变,而*CONTACT CLEARANCE ASSIGNMENT关键字使用时,必须指定接触面。

FEA模型

  如下图的FEA模型,该模型模拟了冲压成形的过程,而且采用了通用接触(general contact)。

image image

左(中面接触)右(中面偏移接触

image

通用接触面的信息

INP文件(通用接触)

  通用接触关键字(*CONTACT)

  中面接触模型设置

Middle Contact(General Contact)
  **HM_PROP_ID          3
**HM_comp_by_property "blank"    24
*SOLID SECTION, ELSET=blank, MATERIAL=blank
**HM_PROP_ID          1
**HM_comp_by_property "mold01"    20
*SHELL SECTION, ELSET=mold01Bottom, MATERIAL=Steel
2.0       ,
**HM_PROP_ID          2
**HM_comp_by_property "mold02"    21
*SHELL SECTION, ELSET=mold02Top, MATERIAL=Steel
2.0       ,
**HM_PROP_ID          4
**HM_Rigid_Body "RigidPro01"         52
*RIGID BODY, REF NODE = 1291, ELSET = mold02Top
**HM_PROP_ID          5
**HM_Rigid_Body "RigidPro02"         53
*RIGID BODY, REF NODE = 1292, ELSET = mold01Bottom
**HMNAME MATS          2 blank     3
*MATERIAL, NAME=blank
*DENSITY
4.5500E-09,0.0       
*ELASTIC, TYPE = ISOTROPIC
210000.0  ,0.3       ,0.0       
*PLASTIC
41.82     ,0.0       ,0.0       
46.35     ,2.0000E-04,0.0       
91.32     ,4.0000E-04,0.0       
139.42    ,6.0000E-04,0.0       
204.25    ,9.0000E-04,0.0       
229.69    ,1.0125E-03,0.0       
271.87    ,0.0012    ,0.0       
294.17    ,0.0013    ,0.0       
344.02    ,0.001525  ,0.0       
360.06    ,0.0016    ,0.0       
409.2     ,0.001825  ,0.0       
469.5     ,0.0021    ,0.0       
522.48    ,0.00235   ,0.0       
541.65    ,0.00245   ,0.0       
557.69    ,0.00255   ,0.0       
595.33    ,0.010425  ,0.0       
635.41    ,0.02095   ,0.0       
659.11    ,0.0333    ,0.0       
**HMNAME MATS          1 Steel     4
*MATERIAL, NAME=Steel
*DENSITY
7.8900E-09,0.0       
*ELASTIC, TYPE = ISOTROPIC
210000.0  ,0.3       ,0.0       
**HMNAME PROPERTY          1 fri
*SURFACE INTERACTION, NAME = fri
*FRICTION
0.1       , 0.0       ,0.0       ,0.0       
**HWNAME LOADCOL          1 BC
**HWCOLOR LOADCOL          1    25
*BOUNDARY
711,1,6,
712,1,6,
713,1,6,
714,1,6,
1292,1,6,
1620,1, ,
1620,2, ,
1620,3, ,
1620,4, ,
1620,5, ,
1620,6, ,
1621,1, ,
1621,2, ,
1621,3, ,
1621,4, ,
1621,5, ,
1621,6, ,
1622,1, ,
1622,2, ,
1622,3, ,
1622,4, ,
1622,5, ,
1622,6, ,
1623,1, ,
1623,2, ,
1623,3, ,
1623,4, ,
1623,5, ,
1623,6, ,
1624,1, ,
1624,2, ,
1624,3, ,
1624,4, ,
1624,5, ,
1624,6, ,
1625,1, ,
1625,2, ,
1625,3, ,
1625,4, ,
1625,5, ,
1625,6, ,
1626,1, ,
1626,2, ,
1626,3, ,
1626,4, ,
1626,5, ,
1626,6, ,
1627,1, ,
1627,2, ,
1627,3, ,
1627,4, ,
1627,5, ,
1627,6, ,
1628,1, ,
1628,2, ,
1628,3, ,
1628,4, ,
1628,5, ,
1628,6, ,
1512,1, ,
1512,2, ,
1512,3, ,
1512,4, ,
1512,5, ,
1512,6, ,
1513,1, ,
1513,2, ,
1513,3, ,
1513,4, ,
1513,5, ,
1513,6, ,
1514,1, ,
1514,2, ,
1514,3, ,
1514,4, ,
1514,5, ,
1514,6, ,
1515,1, ,
1515,2, ,
1515,3, ,
1515,4, ,
1515,5, ,
1515,6, ,
1516,1, ,
1516,2, ,
1516,3, ,
1516,4, ,
1516,5, ,
1516,6, ,
1517,1, ,
1517,2, ,
1517,3, ,
1517,4, ,
1517,5, ,
1517,6, ,
1518,1, ,
1518,2, ,
1518,3, ,
1518,4, ,
1518,5, ,
1518,6, ,
1519,1, ,
1519,2, ,
1519,3, ,
1519,4, ,
1519,5, ,
1519,6, ,
1520,1, ,
1520,2, ,
1520,3, ,
1520,4, ,
1520,5, ,
1520,6, ,
**HMNAME LOADSTEP          1 MoldShappe_Step
*STEP, NLGEOM = YES
*DYNAMIC, EXPLICIT,1.0000E-03,          ,
*AMPLITUDE, NAME = Disp_Mold, DEFINITION = SMOOTH STEP
0.0       ,0.0       
1.0000E-03,1.0       
0.002     ,12.0      
0.003     ,25.0      
**HMNAME CURVE          1 curve1
**HWNAME LOADCOL          2 DispMove
**HWCOLOR LOADCOL          2    57
*BOUNDARY, AMPLITUDE = Disp_Mold
1291,1, ,0.0            
1291,2, ,25.0           
1291,3, ,0.0            
1291,4, ,0.0            
1291,5, ,0.0            
1291,6, ,0.0            
*CONTACT
*CONTACT INCLUSIONS, ALL EXTERIOR
*CONTACT PROPERTY ASSIGNMENT
, , fri
*OUTPUT, FIELD, NUMBER INTERVAL = 5
*NODE OUTPUT
U
*ELEMENT OUTPUT
S,PEEQ
*END STEP

  中面偏移接触设置

Middle offset Contact(General Contact)
  **HM_PROP_ID          3
**HM_comp_by_property "blank"    24
*SOLID SECTION, ELSET=blank, MATERIAL=blank
**HM_PROP_ID          1
**HM_comp_by_property "mold01"    20
*SHELL SECTION, ELSET=mold01Bottom, OFFSET= SPOS, MATERIAL=Steel
2.0       ,
**HM_PROP_ID          2
**HM_comp_by_property "mold02"    21
*SHELL SECTION, ELSET=mold02Top, OFFSET= SPOS, MATERIAL=Steel
2.0       ,
**HM_PROP_ID          4
**HM_Rigid_Body "RigidPro01"         52
*RIGID BODY, REF NODE = 1291, ELSET = mold02Top
**HM_PROP_ID          5
**HM_Rigid_Body "RigidPro02"         53
*RIGID BODY, REF NODE = 1292, ELSET = mold01Bottom
**HMNAME MATS          2 blank     3
*MATERIAL, NAME=blank
*DENSITY
4.5500E-09,0.0       
*ELASTIC, TYPE = ISOTROPIC
210000.0  ,0.3       ,0.0       
*PLASTIC
41.82     ,0.0       ,0.0       
46.35     ,2.0000E-04,0.0       
91.32     ,4.0000E-04,0.0       
139.42    ,6.0000E-04,0.0       
204.25    ,9.0000E-04,0.0       
229.69    ,1.0125E-03,0.0       
271.87    ,0.0012    ,0.0       
294.17    ,0.0013    ,0.0       
344.02    ,0.001525  ,0.0       
360.06    ,0.0016    ,0.0       
409.2     ,0.001825  ,0.0       
469.5     ,0.0021    ,0.0       
522.48    ,0.00235   ,0.0       
541.65    ,0.00245   ,0.0       
557.69    ,0.00255   ,0.0       
595.33    ,0.010425  ,0.0       
635.41    ,0.02095   ,0.0       
659.11    ,0.0333    ,0.0       
**HMNAME MATS          1 Steel     4
*MATERIAL, NAME=Steel
*DENSITY
7.8900E-09,0.0       
*ELASTIC, TYPE = ISOTROPIC
210000.0  ,0.3       ,0.0       
**HMNAME PROPERTY          1 fri
*SURFACE INTERACTION, NAME = fri
*FRICTION
0.1       , 0.0       ,0.0       ,0.0       
**HWNAME LOADCOL          1 BC
**HWCOLOR LOADCOL          1    25
*BOUNDARY
711,1,6,
712,1,6,
713,1,6,
714,1,6,
1292,1,6,
1620,1,6,
1621,1,6,
1622,1,6,
1623,1,6,
1624,1,6,
1625,1,6,
1626,1,6,
1627,1,6,
1628,1,6,
1512,1,6,
1513,1,6,
1514,1,6,
1515,1,6,
1516,1,6,
1517,1,6,
1518,1,6,
1519,1,6,
1520,1,6,
**HMNAME LOADSTEP          1 MoldShappe_Step
*STEP, NLGEOM = YES
*DYNAMIC, EXPLICIT,1.0000E-03,          ,
*AMPLITUDE, NAME = Disp_Mold, DEFINITION = SMOOTH STEP
0.0       ,0.0       
1.0000E-03,1.0       
0.002     ,12.0      
0.003     ,25.0      
**HMNAME CURVE          1 curve1
**HWNAME LOADCOL          2 DispMove
**HWCOLOR LOADCOL          2    57
*BOUNDARY, AMPLITUDE = Disp_Mold
1291,1, ,0.0            
1291,2, ,25.0           
1291,3, ,0.0            
1291,4, ,0.0            
1291,5, ,0.0            
1291,6, ,0.0            
*CONTACT
*CONTACT INCLUSIONS, ALL EXTERIOR
*CONTACT PROPERTY ASSIGNMENT
, , fri
*OUTPUT, FIELD, FREQUENCY=1
*NODE OUTPUT
U
*ELEMENT OUTPUT
S,PEEQ
*END STEP

   关键字信息(*CONTACT CLEARANCE)设置

*CONTACT CLEARANCE(Strain-free)
  **HM_PROP_ID          3
**HM_comp_by_property "blank"    24
*SOLID SECTION, ELSET=blank, MATERIAL=blank
**HM_PROP_ID          1
**HM_comp_by_property "mold01"    20
*SHELL SECTION, ELSET=mold01Bottom, OFFSET= SPOS, MATERIAL=Steel
2.0       ,
**HM_PROP_ID          2
**HM_comp_by_property "mold02"    21
*SHELL SECTION, ELSET=mold02Top, OFFSET= SPOS, MATERIAL=Steel
2.0       ,
**HM_PROP_ID          4
**HM_Rigid_Body "RigidPro01"         52
*RIGID BODY, REF NODE = 1291, ELSET = mold02Top
**HM_PROP_ID          5
**HM_Rigid_Body "RigidPro02"         53
*RIGID BODY, REF NODE = 1292, ELSET = mold01Bottom
*ELSET, ELSET = _Shell_Surface_Top_SPOS
858,849,848,847,846,859,860,861,
862,863,864,865,866,867,868,869,
870,871,872,873,874,875,876,877,
878,879,880,881,882,883,884,885,
886,887,888,889,890,891,892,893,
894,895,896,897,898,899,900,901,
902,903,904,905,906,907,908,909,
912,913,916,917,918,919,920,921,
922,923,924,925,926,927,928,929,
930,931,932,933,934,935,936,937,
938,939,940,941,942,943,944,945,
946,947,948,949,950,951,952,953,
954,955,956,957,958,959,960,961,
962,963,964,965,966,967,968,969,
970,971,972,973,974,975,976,977,
978,979,980,981,982,983,984,985,
986,987,988,989,990,991,992,993,
994,995,996,997,998,999,1000,1001,
1002,1003,1004,1005,1006,1007,1008,1009,
1010,1011,1012,1013,1014,1015,1016,1017,
1018,1020,1022,1023,1024,1025,1026,1028,
1030,1031,1032,1033,4889,4890,4891,4892,
4893,4894,4895,4896,4897,4898,4899,4900,
4901,4902,4903,4904,4905,4906,4907,4908,
4909,4910,4911,4912,4913,4914,4915,4916,
4917,4918,4919,4920,4921,4922,4923,4924,
4925,4926,4927,4928,4929,4930,4931,4932,
4933,4934,4935,4936,
*Surface, NAME = Shell_Surface_Top, TYPE = ELEMENT
_Shell_Surface_Top_SPOS,SPOS
*ELSET, ELSET = _Solid_Surface_Bottom_S2, GENERATE
2833,3832,1
*Surface, NAME = Solid_Surface_Bottom, TYPE = ELEMENT
_Solid_Surface_Bottom_S2,S2
*ELSET, ELSET = _Shell_Surface_Bottom_SPOS
246,245,244,243,186,185,184,183,
182,181,180,179,178,177,176,175,
174,173,172,171,170,169,168,167,
166,165,164,163,162,161,160,159,
158,157,156,155,154,153,152,151,
150,149,148,147,146,145,144,143,
142,141,140,139,138,137,136,135,
130,129,124,123,247,248,249,250,
251,252,253,254,255,256,257,258,
259,260,261,262,263,264,265,266,
267,268,269,270,271,272,273,274,
275,276,277,278,279,280,281,282,
283,284,285,286,287,288,289,290,
291,292,293,294,295,296,297,298,
299,300,301,302,303,304,305,306,
307,308,309,310,311,312,313,314,
315,316,317,318,319,320,321,322,
323,324,325,326,327,328,329,330,
331,332,333,334,335,336,337,338,
339,340,341,342,343,344,345,346,
347,349,351,352,353,354,355,357,
359,360,361,362,4848,4846,4844,4842,
4840,4838,4836,4834,4849,4850,4851,4852,
4853,4854,4855,4856,4857,4858,4859,4860,
4861,4862,4863,4864,4865,4866,4867,4868,
4869,4870,4871,4872,4873,4874,4875,4876,
4877,4878,4879,4880,4888,4887,4886,4885,
4884,4883,4882,4881,
*Surface, NAME = Shell_Surface_Bottom, TYPE = ELEMENT
_Shell_Surface_Bottom_SPOS,SPOS
*ELSET, ELSET = _Solid_Surface_Top_S2, GENERATE
3833,4832,1
*Surface, NAME = Solid_Surface_Top, TYPE = ELEMENT
_Solid_Surface_Top_S2,S2
**HMNAME MATS          2 blank     3
*MATERIAL, NAME=blank
*DENSITY
4.5500E-09,0.0       
*ELASTIC, TYPE = ISOTROPIC
210000.0  ,0.3       ,0.0       
*PLASTIC
41.82     ,0.0       ,0.0       
46.35     ,2.0000E-04,0.0       
91.32     ,4.0000E-04,0.0       
139.42    ,6.0000E-04,0.0       
204.25    ,9.0000E-04,0.0       
229.69    ,1.0125E-03,0.0       
271.87    ,0.0012    ,0.0       
294.17    ,0.0013    ,0.0       
344.02    ,0.001525  ,0.0       
360.06    ,0.0016    ,0.0       
409.2     ,0.001825  ,0.0       
469.5     ,0.0021    ,0.0       
522.48    ,0.00235   ,0.0       
541.65    ,0.00245   ,0.0       
557.69    ,0.00255   ,0.0       
595.33    ,0.010425  ,0.0       
635.41    ,0.02095   ,0.0       
659.11    ,0.0333    ,0.0       
**HMNAME MATS          1 Steel     4
*MATERIAL, NAME=Steel
*DENSITY
7.8900E-09,0.0       
*ELASTIC, TYPE = ISOTROPIC
210000.0  ,0.3       ,0.0       
*CONTACT
*CONTACT INCLUSIONS
Shell_Surface_Top, Solid_Surface_Top
Shell_Surface_Bottom, Solid_Surface_Bottom
*CONTACT PROPERTY ASSIGNMENT
, , fri
*CONTACT CLEARANCE ASSIGNMENT
Shell_Surface_Bottom, Solid_Surface_Bottom, clearancJust,    
**HMNAME PROPERTY          2 fri
*SURFACE INTERACTION, NAME = fri
*FRICTION
0.1       , 0.0       ,0.0       ,0.0       
*CONTACT CLEARANCE, NAME = clearancJust, ADJUST = YES
**HWNAME LOADCOL          1 BC
**HWCOLOR LOADCOL          1    25
*BOUNDARY
711,1,6,
712,1,6,
713,1,6,
714,1,6,
1292,1,6,
1620,1,6,
1621,1,6,
1622,1,6,
1623,1,6,
1624,1,6,
1625,1,6,
1626,1,6,
1627,1,6,
1628,1,6,
1512,1,6,
1513,1,6,
1514,1,6,
1515,1,6,
1516,1,6,
1517,1,6,
1518,1,6,
1519,1,6,
1520,1,6,
**HMNAME LOADSTEP          1 MoldShappe_Step
*STEP, NLGEOM = YES
*DYNAMIC, EXPLICIT,1.0000E-03,          ,
*AMPLITUDE, NAME = Disp_Mold, DEFINITION = SMOOTH STEP
0.0       ,0.0       
1.0000E-03,1.0       
0.002     ,12.0      
0.003     ,25.0      
**HMNAME CURVE          1 curve1
**HWNAME LOADCOL          2 DispMove
**HWCOLOR LOADCOL          2    57
*BOUNDARY, AMPLITUDE = Disp_Mold
1291,1, ,0.0            
1291,2, ,25.0           
1291,3, ,0.0            
1291,4, ,0.0            
1291,5, ,0.0            
1291,6, ,0.0            
*OUTPUT, FIELD
*NODE OUTPUT
U
*ELEMENT OUTPUT
S,PEEQ
*END STEP

FEA结果(通用接触)

  根据下图FEA结果可知,中面接触中面偏移接触应力的分布基本一致,但还是存在一些区别;关键字(*Contact Clearance)设置可处理初始的间隙(Clearance)和穿透(Overclosure)问题,提高仿真的精度。 

image

显式中通用接触结果

接触对(contact pair)

  显示接触中,设置接触对的关键字如下,使用*Contact pair关键字前需要定义接触面(*Surface);在使用接触面时需要注意主从面的区分(Master&Slave)。

  在设置接触面时:

  • 刚性面必须为主面(Master surface)
  • 柔性面必须为从面(Slave surface)
  • 点面中必须为从面(Slave surface)
*STEP
Step2
*DYNAMIC, EXPLICIT
…
*CONTACT PAIR, INTERACTION=GRATING,OP=DELETE
ASURF, BSURF
**接触属性定义(可定义在分析步step之前)
*SURFACE INTERACTION, NAME=GRATING_NEW
*FRICTION
0.5
**接触对
*CONTACT PAIR, INTERACTION=GRATING_NEW
ASURF, BSURF

   定义接触的属性时,同样使用关键字*SURFACE INTERACTION*FRICTION

接触对接触中问题分析

  在显式分析中,使用接触对时,中面偏移接触会导致求解报错,需要在关键字(*SURFACE中设置NO THICK)忽略厚度,否则需要调整2D单元到合适的间距上。

*Surface, NAME = SurfaceName, TYPE = ELEMENT,NO THICK
SetName,SPOS

INP文件(接触对)

  显式接触对分析关键字*CONTACT PAIR, INTERACTION = fri,并且接触对设置在分析步中*Step。

  无厚度中面直接接触

MiddleSurface_ContactPair
 **HM_PROP_ID          3
**HM_comp_by_property "blank"    24
*SOLID SECTION, ELSET=blank, MATERIAL=blank
**HM_PROP_ID          1
**HM_comp_by_property "mold01"    20
*SHELL SECTION, ELSET=mold01Bottom, OFFSET= SPOS, MATERIAL=Steel
2.0       ,
**HM_PROP_ID          2
**HM_comp_by_property "mold02"    21
*SHELL SECTION, ELSET=mold02Top, OFFSET= SPOS, MATERIAL=Steel
2.0       ,
**HM_PROP_ID          4
**HM_Rigid_Body "RigidPro01"         52
*RIGID BODY, REF NODE = 1291, ELSET = mold02Top
**HM_PROP_ID          5
**HM_Rigid_Body "RigidPro02"         53
*RIGID BODY, REF NODE = 1292, ELSET = mold01Bottom
*ELSET, ELSET = _mold01Bottom_S_S2, GENERATE
2833,3832,1
*Surface, NAME = mold01Bottom_S, TYPE = ELEMENT
_mold01Bottom_S_S2,S2
*ELSET, ELSET = _mold01Bottom_M_SPOS
246,245,244,243,186,185,184,183,
182,181,180,179,178,177,176,175,
174,173,172,171,170,169,168,167,
166,165,164,163,162,161,160,159,
158,157,156,155,154,153,152,151,
150,149,148,147,146,145,144,143,
142,141,140,139,138,137,136,135,
130,129,124,123,247,248,249,250,
251,252,253,254,255,256,257,258,
259,260,261,262,263,264,265,266,
267,268,269,270,271,272,273,274,
275,276,277,278,279,280,281,282,
283,284,285,286,287,288,289,290,
291,292,293,294,295,296,297,298,
299,300,301,302,303,304,305,306,
307,308,309,310,311,312,313,314,
315,316,317,318,319,320,321,322,
323,324,325,326,327,328,329,330,
331,332,333,334,335,336,337,338,
339,340,341,342,343,344,345,346,
347,349,351,352,353,354,355,357,
359,360,361,362,4848,4846,4844,4842,
4840,4838,4836,4834,4849,4850,4851,4852,
4853,4854,4855,4856,4857,4858,4859,4860,
4861,4862,4863,4864,4865,4866,4867,4868,
4869,4870,4871,4872,4873,4874,4875,4876,
4877,4878,4879,4880,4888,4887,4886,4885,
4884,4883,4882,4881,
*Surface, NAME = mold01Bottom_M, TYPE = ELEMENT,NO THICK
_mold01Bottom_M_SPOS,SPOS
*ELSET, ELSET = _mold02Top_S_S2, GENERATE
3833,4832,1
*Surface, NAME = mold02Top_S, TYPE = ELEMENT
_mold02Top_S_S2,S2
*ELSET, ELSET = _mold02Top_M_SPOS
858,849,848,847,846,859,860,861,
862,863,864,865,866,867,868,869,
870,871,872,873,874,875,876,877,
878,879,880,881,882,883,884,885,
886,887,888,889,890,891,892,893,
894,895,896,897,898,899,900,901,
902,903,904,905,906,907,908,909,
912,913,916,917,918,919,920,921,
922,923,924,925,926,927,928,929,
930,931,932,933,934,935,936,937,
938,939,940,941,942,943,944,945,
946,947,948,949,950,951,952,953,
954,955,956,957,958,959,960,961,
962,963,964,965,966,967,968,969,
970,971,972,973,974,975,976,977,
978,979,980,981,982,983,984,985,
986,987,988,989,990,991,992,993,
994,995,996,997,998,999,1000,1001,
1002,1003,1004,1005,1006,1007,1008,1009,
1010,1011,1012,1013,1014,1015,1016,1017,
1018,1020,1022,1023,1024,1025,1026,1028,
1030,1031,1032,1033,4889,4890,4891,4892,
4893,4894,4895,4896,4897,4898,4899,4900,
4901,4902,4903,4904,4905,4906,4907,4908,
4909,4910,4911,4912,4913,4914,4915,4916,
4917,4918,4919,4920,4921,4922,4923,4924,
4925,4926,4927,4928,4929,4930,4931,4932,
4933,4934,4935,4936,
*Surface, NAME = mold02Top_M, TYPE = ELEMENT,NO THICK
_mold02Top_M_SPOS,SPOS
**HMNAME MATS          2 blank     3
*MATERIAL, NAME=blank
*DENSITY
4.5500E-09,0.0       
*ELASTIC, TYPE = ISOTROPIC
210000.0  ,0.3       ,0.0       
*PLASTIC
41.82     ,0.0       ,0.0       
46.35     ,2.0000E-04,0.0       
91.32     ,4.0000E-04,0.0       
139.42    ,6.0000E-04,0.0       
204.25    ,9.0000E-04,0.0       
229.69    ,1.0125E-03,0.0       
271.87    ,0.0012    ,0.0       
294.17    ,0.0013    ,0.0       
344.02    ,0.001525  ,0.0       
360.06    ,0.0016    ,0.0       
409.2     ,0.001825  ,0.0       
469.5     ,0.0021    ,0.0       
522.48    ,0.00235   ,0.0       
541.65    ,0.00245   ,0.0       
557.69    ,0.00255   ,0.0       
595.33    ,0.010425  ,0.0       
635.41    ,0.02095   ,0.0       
659.11    ,0.0333    ,0.0       
**HMNAME MATS          1 Steel     4
*MATERIAL, NAME=Steel
*DENSITY
7.8900E-09,0.0       
*ELASTIC, TYPE = ISOTROPIC
210000.0  ,0.3       ,0.0       
**HMNAME PROPERTY          1 fri
*SURFACE INTERACTION, NAME = fri
*FRICTION
0.1       , 0.0       ,0.0       ,0.0       
**HMNAME PROPERTY          5 fri1
*SURFACE INTERACTION, NAME = fri1
*FRICTION
0.1       , 0.0       ,0.0       ,0.0       
**HWNAME LOADCOL          1 BC
**HWCOLOR LOADCOL          1    25
*BOUNDARY
711,1,6,
712,1,6,
713,1,6,
714,1,6,
1292,1,6,
1620,1,6,
1621,1,6,
1622,1,6,
1623,1,6,
1624,1,6,
1625,1,6,
1626,1,6,
1627,1,6,
1628,1,6,
1512,1,6,
1513,1,6,
1514,1,6,
1515,1,6,
1516,1,6,
1517,1,6,
1518,1,6,
1519,1,6,
1520,1,6,
**HMNAME LOADSTEP          1 MoldShappe_Step
*STEP, NLGEOM = YES
*DYNAMIC, EXPLICIT,1.0000E-03,          ,
*AMPLITUDE, NAME = Disp_Mold, DEFINITION = SMOOTH STEP
0.0       ,0.0       
1.0000E-03,1.0       
0.002     ,12.0      
0.003     ,25.0      
**HMNAME CURVE          1 curve1
**HWNAME LOADCOL          2 DispMove
**HWCOLOR LOADCOL          2    57
*BOUNDARY, AMPLITUDE = Disp_Mold
1291,1, ,0.0            
1291,2, ,25.0           
1291,3, ,0.0            
1291,4, ,0.0            
1291,5, ,0.0            
1291,6, ,0.0            
**HMNAME GROUPS          3 Contact_Pair01
*CONTACT PAIR, INTERACTION = fri
mold02Top_S,mold02Top_M
**HMNAME GROUPS          4 Contact_Pair02
*CONTACT PAIR, INTERACTION = fri1
mold01Bottom_S,mold01Bottom_M
*OUTPUT, FIELD
*NODE OUTPUT
U
*ELEMENT OUTPUT
S,PEEQ
*END STEP

 

FEA结果(接触对结果)

image

显式中接触对结果

  根据上面接触参数设置的结果可知,在显式接触对中,需要注意使用 2D单元时,注意中面的影响,如考虑厚度影响,需要设置正确的中面位置。

INP文件

 FEA的网格信息

参考

Contact pairs in Abaqus/Explicit

http://www.jsqmd.com/news/418106/

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