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第頁ANSYS中使用COMBIN39單元的實例1轉(zhuǎn)貼個例子吧finish/clear/units,si/prep7antype,staticet,1,solid65r,1,MPTEMP,,,,,,,,MPTEMP,1,0MPDATA,EX,1,,1.97e9MPDATA,PRXY,1,,0.27TB,BKIN,1,1,2,1TBTEMP,0TBDATA,,1.97e6,,,,,TB,CONC,1,1,9,TBTEMP,0TBDATA,,0,1,0.4e6,-1,,TBDATA,,,,,,,blc4,,,300,300,1400*do,i,1,8,1lesize,i,50*enddo*do,i,9,12,1lesize,i,100*enddovmesh,1et,2,link8!是否應(yīng)用PIPE單元r,2,0.000576mp,ex,2,2.1e11mp,prxy,2,0.3type,2mat,2real,2k,11,150,150k,12,150,150,1400l,11,12lesize,13,100lmesh,13et,3,combin39keyopt,3,3,3mp,ex,3,36534r,3,0.012,340.98,0.023144013,676.822,0.041007667,1009.222rmore,0.060508355,1329.6,0.078506,1669.288667,0.13106,2019.533333rmore,0.201904,2332.511333,0.297857,2678.866667,0.381036,3004.466667rmore,0.491887,3340.466667,0.634276,3667.711333,2.961887,3864.733333rmore,2.989726,3982.733333,3.05323,4143.8,3.141894,4204.355333rmore,3.16088,4294.266667,3.232973,4385.644667,3.244492,4473.044667rmore,3.333723,4047.6,type,3mat,3real,3e,37,736e,86,737*do,i,567,579,1e,i,i+171*enddosaveet,4,shell63r,4,0.015,0.015,0.015,0.015mp,ex,4,2.5e4mp,prxy,4,0.3type,4mat,4real,4asel,,,,3,6,1aatt,4,4,4,amesh,3,6,1allselfinish/solunsel,s,loc,z,1400nsel,r,loc,x,0d,all,allallselnsel,s,loc,z,1400nsel,r,loc,x,300d,all,allallseltime,0*do,i,1,11,1time,if,737,fz,5000*icnvtol,f,,0.1,2nropt,fulloutres,all,allnsubst,10nlgeom,onsolvefdele,all*enddo*do,i,12,25,1f,737,fz,55000+2500*(i-11)time,icnvtol,f,,0.05,2nropt,fulloutres,all,allnsubst,10nlgeom,onsolvefdele,all*enddoANSYS中使用COMBIN39單元的實例2/PREP7ANTYPE,TRANS!NONLINEARTRANSIENTDYNAMICANALYSISET,1,COMBIN39,,,2!ELEMENTWITHDISPLACEMENTALONGNODALY-AXISET,2,MASS21,,,4!MASSWITHOUTROTARYINERTIAR,1,0.0,0.0,.1,.204,.2,.432!SPRINGDATAR,2,2588E-6!MASSDATAN,1N,2E,1,2TYPE,2REAL,2E,2D,1,ALLD,2,UXIC,2,UY,-1!INITIALDISPLACEMENTANDVELOCITYKBC,1!STEPLOADINGSAVEFINISH/SOLUSOLCONTROL,0CNVTOL,F,1,1E-4!FORCECONVERGENCECRITERIAOUTRES,NSOL,1NSUBST,5OUTPR,BASIC,NONETIME,.0002!TIMETOALLOWINITIALCHANGEINACCELERATIONLSWRITE!WRITELOADSTEPFILE1NSUBST,40OUTPR,BASIC,LASTTIME,0.18!TIMEARBITRARILYSELECTEDLSWRITE!WRITELOADSTEPFILE2LSSOLVE,1,2,1!READIN2LOADSTEPSANDSOLVEFINISH/POST26TIMERANGE,.003,.18NSOL,2,2,U,Y,2UYPRVAR,2!PRINTDISPLACEMENTS*GET,PER,VARI,2,EXTREM,TMIN*status,parmFINISHfrp鋼筋混凝土加固梁的粘結(jié)滑移問題我最近在做frp鋼筋混凝土加固梁的剝離問題,采用ansys建立模型。solid65模擬混凝土,combin39單元來模擬frp與混凝土之間的粘結(jié)滑移,有一些錯誤,希望高手們有時間幫我看看。多謝了
很多人說,采用ansys算粘結(jié)滑移很難算到收斂,但是不知道有沒有算出來的,只要有可能,我就不放棄了。
命令流如下:
!第一組
/prep7
!定義參數(shù)和單元類型
!混凝土參數(shù)
*SET,hntra,20.5
*SET,ec,28800
*SET,possible,0.3
*SET,hntrl,2.35
!FRP參數(shù)
*SET,ff,1800
!抗拉強(qiáng)度
*SET,ef,220000
!彈性模量
!FRP纖維布的極限拉應(yīng)變
*SET,ckf,ff/ef
!FRP厚度
*SET,tf,0.121*2
et,1,solid65
!混凝土單元
KEYOPT,1,1,1
!不考慮大變形
KEYOPT,1,7,1
!考慮應(yīng)力松弛,有助于計算收斂
et,2,link8
!鋼筋單元
et,3,shell43
!模擬frp布
et,4,solid45
!剛性墊塊
!定義實常數(shù)
r,1,50.3
!縱向受拉鋼筋實常數(shù)
r,2,28.3
!縱向受壓鋼筋,箍筋實常數(shù)
r,3
!混凝土
R,4,tf,tf,tf,tf,,,
!frp的實常數(shù)
RMORE,,
r,5
!墊塊
ET,5,COMBIN39
!法向彈簧
keyopt,5,1,0
keyopt,5,2,1
KEYOPT,5,3,3
r,6,0,0,0.0005,29340,0.001,41577
!粘結(jié)滑移關(guān)系
rmore,0.005,92970,0.01,131478,0.015,161028
rmore,0.02,185939,0.025,207886,0.029214,224725
!定義材料屬性
mp,ex,1,ec
!混凝土材料屬性
mp,prxy,1,possible
tb,conc,1
!混凝土自帶的破壞準(zhǔn)那么
tbdata,,0.5,0.9,hntrl,-1
!混凝土本構(gòu)關(guān)系
tb,miso,1,,23
tbpt,,0.000005,hntra*0.0074627
tbpt,,0.00001,hntra*0.00992537
tbpt,,0.00005,hntra*0.0491293
tbpt,,0.0001,hntra*0.0970149
tbpt,,0.0002,hntra*0.19
tbpt,,0.0004,hntra*0.36
tbpt,,0.0006,hntra*0.51
tbpt,,0.0008,hntra*0.64
tbpt,,0.0010,hntra*0.75
tbpt,,0.0012,hntra*0.84
tbpt,,0.0014,hntra*0.91
tbpt,,0.0016,hntra*0.96
tbpt,,0.0018,hntra*0.99
tbpt,,0.0020,hntra*1.00
tbpt,,0.0022,hntra*0.98
tbpt,,0.0024,hntra*0.97
tbpt,,0.0026,hntra*0.95
tbpt,,0.0028,hntra*0.93
tbpt,,0.003,hntra*0.92
tbpt,,0.0032,hntra*0.9
tbpt,,0.0034,hntra*0.88
tbpt,,0.0036,hntra*0.87
tbpt,,0.0038,hntra*0.85
mp,ex,2,1.94e5
!縱向受拉鋼筋
mp,prxy,2,0.3
tb,bkin,2,1,2,1
tbdata,,368.3,2000
mp,ex,3,1.97e5
!橫向箍筋,受壓鋼筋材料屬性
mp,prxy,3,0.3
tb,bkin,3,1,2,1
tbdata,,410.6,2000
!定義FRP
mp,ex,4,ef
mp,prxy,4,0.3
mp,ex,5,ec
!墊塊材料屬性
mp,prxy,5,possible
!建模
blc4,,,100,200,-1100
k,9,20,40,0
!鋼筋
k,10,20,40,-1100
l,9,10
lgen,2,13,,,60
lsel,s,line,,13,14
LPLOT
CM,zlj,LINE
allsel,all
lgen,2,13,,,,120
lgen,2,14,,,,120
lsel,s,line,,15,16
lplot
cm,zyj,line
allsel,all
k,17,20,40,-500
!箍筋
k,18,80,40,-500
k,19,20,160,-500
l,17,18
l,17,19
lgen,2,17,,,,120
lgen,2,18,,,60
lsel,s,line,,17,20,1
LPLOT
*do,ii,1,5
lgen,2,17,20,1,,,-ii*100
ii=ii+1
*enddo
LPLOT
cm,gj,line
WPAVE,0,0,0
!CFRP
wprota,,90
!旋轉(zhuǎn)工作平面yz,90°
wpoffs,,,0.835
!偏移工作平面z
cfrp面與混凝土面之間距離為0.835mm
blc4,,,100,-1000
wpoffs,,,-0.835
!支座面與cfp下外表距離為0.835mm
wpoffs,,-1100
blc4,,,100,100,20
!支座處混凝土墊塊100*100*20
wpoffs,,600
wpoffs,,,-200
wprota,,-90
blc4,,,100,20,-100
!荷載處混凝土墊塊是100*100*20
allsel,all
!劃分單元
VSEL,s,volu,,1
!混凝土網(wǎng)格劃分較細(xì)為25*50*25
VATT,1,3,1
LSEL,s,line,,12
LSEL,a,line,,7
LSEL,a,line,,8
LESIZE,12,50,,,,,,,0
LESIZE,7,20,,,,,,,0
LESIZE,8,20,,,,,,,0
MSHAPE,0,3D
MSHKEY,1
VMESH,1
cmsel,s,zlj,line
!主la筋劃分為50mm
lATT,2,1,2
LESIZE,all,50,,,,,,,0
LMESH,all
cmsel,s,zyj,line
!主ya筋劃分為50mm
lATT,3,2,2
LESIZE,all,50,,,,,,,0
LMESH,all
cmsel,s,gj,line
!箍筋為20mm
lplot
lATT,3,2,2
LESIZE,all,20,,,,,,,0
LMESH,all
asel,s,area,,7
!CFRP劃分單元為四邊形20*50
aplot
AATT,3,4,3
lsel,s,,,42
lsel,a,,,43
LESIZE,42,50,,,,,,,0
LESIZE,43,20,,,,,,,0
mshape,0,2D
MSHKEY,1
AMESH,7
allsel,all
!劃分支座墊塊為25*50*20
VSEL,s,,,2
!選擇體2
VATT,5,3,4
LESIZE,50,50,,,,,,,0
LESIZE,51,20,,,,,,,0
LESIZE,55,20,,,,,,,0
LESIZE,47,50,,,,,,,0
LESIZE,49,20,,,,,,,0
LESIZE,53,20,,,,,,,0
MSHAPE,0,3D
MSHKEY,1
VMESH,all
/VIEW,1,1,1,1
allsel,all
!劃分支座墊塊為25*50*20
VSEL,s,,,3
!選擇體2
VATT,5,3,4
LESIZE,67,50,,,,,,,0
LESIZE,62,20,,,,,,,0
LESIZE,61,20,,,,,,,0
LESIZE,66,50,,,,,,,0
LESIZE,57,20,,,,,,,0
LESIZE,58,20,,,,,,,0
MSHAPE,0,3D
MSHKEY,1
VMESH,all
allsel,all
nsel,s,loc,y,-0.835,0
!彈簧單元0
nplot
TYPE,5
REAL,6
ESYS,
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