ANSYS裂缝扩展模拟程序.doc

1、！裂纹扩展程序/prep7 et,1,plane82mptemp, mptemp,1,0 mpdata,ex,1,2.07e5mpdata,prxy,1,0.3 k,101,0,0, k,102,200,0, k,103,200,50, k,104,0,50,k,105,100,50,k,106,80,0,k,107,80,0, k,108,80,10, l,106,108 l,103,104 lextnd,1,108,100,1 lsbl,2,3lplot a,101,106,108,2,104 a,107,102,103,105,2,108 kscon,108,0.2,1,08,1, ms

2、hape,1,2d !自由划分网格mshkey,0amesh,1amesh,2 dk,101,all dk,102,all fk,105,fy,-200finish /solsolve finish nplot local,11,0,80,10,0,-90, , ,1,1, ！建立以裂尖为原点的局部坐标系，裂纹面平行于x轴nsel,s,loc,y,0 !在cs坐标系(当前坐标系)下选择y=0的结点nsel,r,loc,x,0,0.2 !根据kscon命令可知沿裂纹面路径的x坐标nlist !共选择5个点*get,nnub,node,count !获取节点总数nnub *dim,aa,array

3、,nnub*get,aa(1),node,num,min*do,i,2,nnub*get,aa(i),node,aa(i-1),nxth*enddoflst,2,nnub,1 *do,i,1,nnubfitem,2,aa(i)*enddopath,101,nnub,30,20, ！定义路径ppath,p51x,1path,stat kcalc,1,1,3,0 ！计算裂纹强度因子finish *get,ki1,kcalc,k,1 !分别读取应力强度因子ki1,ki2*get,ki2,kcalc,k,2*afun,deg !改变角度的单位为度theta1=2*atan(0.25*(ki1/ki2-

4、sqrt(ki1/ki2)*2+8) !计算裂纹扩展角 坐标the=abs(theta1)*dim,kt,array,20,3kt(1,1)=ki1kt(1,2)=ki2kt(1,3)=theta1*do,i,2,10 !循环的步数aclear,1,2 !清除网格划分adele,1,2,0 !仅删除面1,2，保留线（如果直接删除线，关键点也将随之删除）ldele,all,0 !删除所有的线kdele,2 !删除关键点2*get,kmax,kp,num,max !获取最大关键点编号k,kmax+2(i-1)-1,0,0 !在原局部坐标系下增加一个关键点，与之前裂尖关键点坐标相同k,kmax+2(

5、i-1),-3*cos(the),3*sin(the) !在原局部坐标系下增加另一个关键点，即为下一个裂尖关键点kdele,kmax !因为一个面上不能定义两个KSCON，故需要删除前面在最大号关键点定义的KSCON,自动删除局部坐标*get,kx,kp,kmax+2(i-1)-1,loc,x*get,ky,kp,kmax+2(i-1)-1,loc,yk,kmax,kx,kycsdele，11*get,knub,kp,count !获取关键点的数目*dim,kk,array,knub !建立一个一维矩阵*get,kk(1),kp,num,max !获取最大关键点编号*do,j,2,knub*g

6、et,kk(j),kp,kk(j-1),nxtl*enddol,103,104 !连接关键点，自动编号为1，用于截取线段（如果角度过大，需连接l,102,103,并进行判定与哪条直线相交）*do,ii,106,kk(1)l,ii,ii+2 !连接关键点成线ii=ii+1*enddo*get,lmax,line,num,max !获取线的最大编号lextnd,lmax,kk(1),200,1 !从裂尖方向延伸最大编号的线，自动生成关键点1*get,lmax,line,num,max !获取线的最大编号lsbl,1,lmax !用线1截取生成的延伸线，在1上自动生成关键点2，同时删除关键点1!通过

7、判定关键点奇偶数来确定合成面需要的点*do,j,2,knub *if,kk(j),gt,108,and,kk(j),lt,kmax,then *if,abs(nint(kk(j)/2)-kk(j)/2),le,0.1,then !判定奇偶数命令，如果为偶数 *get,kpos,kp,count *dim,os,array,kpos *get,os(1),kp,num,max *do,jj,2,kpos *get,os(jj),kp,os(jj-1),nxtl *enddo flst,2,kpos+7,3 fitem,2,108 fitem,2,106 fitem,2,101 fitem,2,1

8、04 fitem,2,105 !必须选择关键点105，否则荷载无法施加 fitem,2,2 fitem,2,kk(1) *do,jjj,1,kpos fitem,2,os(jjj) jjj=jjj+1 *enddo a,p51x !利用关键点连接成面 *else *get,kpjs,kp,count *dim,js,array,kpjs *get,js(1),kp,num,max *do,jj,2,kpos *get,js(jj),kp,js(jj-1),nxtl*enddo flst,2,kpjs+5,3 fitem,2,107 fitem,2,102 fitem,2,103 fitem,2

9、,2 fitem,2,kk(1) !必须选择关键点105，否则荷载无法施加 *do,jjj,1,kpjs fitem,2,js(jjj) jjj=jjj+1 *enddo a,p51x !利用关键点连接成面 *endif *endif*enddokscon,kk(1),0.2,1,08,1, mshape,1,2d !自由划分网格mshkey,0amesh,1amesh,2 dk,101,all dk,102,all fk,105,fy,-200FINISH /sol/status,solusolve finish *get,kx,kp,loc,kk(1),x !读取裂尖关键点的x坐标*get

10、,ky,kp,loc,kk(1),y !读取裂尖关键点的y坐标local,11,0,kx,ky,0,-90+theta(i-1), , ,1,1, !旋转角度待修改nsel,s,loc,y,0 !在CS坐标系(当前坐标系)下选择y=0的结点nsel,r,loc,x,0,0.2 !根据kscon命令可知沿裂纹面路径的x坐标nlist !共选择5个点*get,nnub,node,count !获取节点总数nnub*dim,aa,array,nnub*get,aa(1),node,num,min*do,i,2,nnub*get,aa(i),node,aa(i-1),nxth*enddoflst,2,

11、nnub,1 *do,i,1,nnubfilem,2,aa(i)*enddopath,101,nnub,30,20, ppath,p51x,1path,stat kcalc,1,1,3,0 finish *get,ki1,kcalc,k,1 !分别读取应力强度因子ki1,ki2*get,ki2,kcalc,k,2*afun,deg !改变角度的单位为度theta1=2*atan(0.25*(ki1/ki2-sqrt(ki1/ki2)*2+8) !计算裂纹扩展角 坐标the=abs(theta1)*dim,kt,array,20,3kt(i,1)=ki1kt(i,2)=ki2kt(i,3)=theta1*enddo