我有个矩形薄板,有一定厚度,受到横向的均布载荷,周边固支。
我现在用shell181,均布载荷以压力的形式加在面上。
现在发现的问题是,上下表面的应力状况完全相同,厚度方向上没有信息,照理会有很弱的横向的剪切变形的。
APDL如下
/prep7
et,1,shell181 !Element type
k,1,0,0,0 !Geometry
k,2,4,0,0
k,3,4,6,0
k,4,0,6,0
a,1,2,3,4
mp,ex,1,32e9 !Material properties
mp,prxy,1,0.25
mp,dens,1,2450
sect,1,shell,,up !Sections
secdata,0.5,1,,
asel,s,loc,z,0 !Mesh
mat,1
type,1
mshkey,1
esize,0.25
amesh,all
nsel,s,loc,x,4 !Boundary conditions
nsel,a,loc,y,6
D,all,ux,,,,,uy,uz,rotx,roty,rotz !Clamped BC
allsel,all
nsel,s,loc,x,0 !Symmetry constraints
dsym,symm,x
nsel,s,loc,y,0
dsym,symm,y
sfa,all,2,pres,-2500 !Load on the topplane
allsel,all
/solu !Solve
antype,static
solve
finish |