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看帮助文件阿，是八个节点，六个自由度吧？
SHELL99 Input Summary
Nodes
I, J, K, L, M, N, O, P
Degrees of Freedom
UX, UY, UZ, ROTX, ROTY, ROTZ
Real Constants
See Table 99.1: "SHELL99 Real Constants" for a description of the real constants.
Material Properties
If KEYOPT(2) = 0 or 1, supply the following 13*NM properties where NM is the number of materials (maximum is NL):
EX, EY, EZ, ALPX, ALPY, ALPZ (or CTEX, CTEY, CTEZ or THSX, THSY, THSZ), (PRXY, PRYZ, PRXZ or NUXY, NUYZ, NUXZ),
DENS, GXY, GYZ, GXZ, for each of the NM materials.
If KEYOPT(2) = 2, 3 or 4, supply none of the above.
Supply DAMP and REFT only once for the element (use MAT command to assign material property set). See the discussion in "SHELL99 Input Data" for more details.
Surface Loads
Pressures --
face 1 (I-J-K-L) (bottom, in +Z direction), face 2 (I-J-K-L) (top, in -Z direction),
face 3 (J-I), face 4 (K-J), face 5 (L-K), face 6 (I-L)
Body Loads
Temperatures --
T1, T2, T3, T4, T5, T6, T7, T8 if KEYOPT(2) = 0 or 1
None if KEYOPT(2) = 2, 3 or 4
Special Features
Stress stiffening
Large deflection
KEYOPT(2)
Form of input:
0 --
Constant thickness layer input (250 layers maximum)
1 --
Tapered layer input (125 layers maximum)
2 --
6 x 6 matrix input using linear logic
3 --
6 x 6 matrix input using quadratic logic
4 --
3 x 3 matrix input using linear logic
KEYOPT(3)
Extra element output:
0 --
Basic element printout
1 --
Integration point strain printout
2 --
Nodal force and moment printout in element coordinates
3 --
Force and moment per unit length printout (available only if KEYOPT(2) = 0 or 1)
4 --
Combination of all three options
KEYOPT(4)
Element coordinate system defined by:
0 --
No user subroutines used to define element coordinate system
4 --
Element x-axis located by user subroutine USERAN
5 --
Element x-axis located by user subroutine USERAN and layer x-axes located by user subroutine USANLY
Note
See the Guide to ANSYS User Programmable Features for user written subroutines
KEYOPT(5)
Strains or stresses output (will be used with KEYOPT(6)):
0 --
Strain results will be used
1 --
Stress results will be used
2 --
Both strain and stress results will be used
KEYOPT(6)
Extra element output (for layer input only) (used for printout control):
0 --
Basic element printout, as well as the summary of the maximum of all the failure criteria
1 --
Same as 0 but also print the summary of all the failure criteria and the summary of the maximum of the interlaminar shear stress
2 --
Same as 1 but also print the layer solution at the integration points in the bottom layer (or LP1) and the top layer (or LP2)
3 --
Same as 1 but also print the layer solution at the element centroid for all layers, as well as the interlaminar shear stress solution between layers
4 --
Same as 1 but also print the layer solution at the corner nodes for all layers, as well as the interlaminar shear stress solution between layers
5 --
Same as 1 but also print the layer solution with the failure criterion values at the integration points for all layers, as well as the interlaminar shear stress solution between layers
Note
No stresses, thermal strains, or failure criteria are available with matrix input.
KEYOPT(8)
Storage of layer data:
0 --
Store data for bottom of bottom layer (or LP1) and top of top layer (or LP2). Also store data for maximum failure criteria layer.
1 --
Store data for all layers.
Caution
Volume of data stored may be excessive.
KEYOPT(9)
Determines where strains, stresses, and failure criteria are evaluated (available only if KEYOPT(2) = 0 or 1 with NL > 1):
0 --
Evaluate strains and stresses at top and bottom of each layer
1 --
Evaluate at midthickness of each layer
KEYOPT(10)
Material property matrix output:
0 --
No material property matrices printed
1 --
Print material property matrices integrated through thickness for element number 1, if element number 1 is a SHELL99 element
2 --
Same as 1 but if KEYOPT(2) = 0 or 1, also write matrices as RMODIF commands for use with KEYOPT(2) = 2
3 --
Same as 1 but if KEYOPT(2) = 0 or 1, also write matrices as RMODIF commands for use with KEYOPT(2) = 3
KEYOPT(11)
Node offset option:
0 --
Nodes located at midsurface
1 --
Nodes located at bottom surface
2 --
Nodes located at top surface