【原创】有局部屈曲，大应变，大转角情况，如何选单元『推荐』

jxln · 发表于 2004-6-24 09:54:56

象这种情况，跨中产生较大局部屈曲，存在较大塑性应变，壁宽厚比在25－40之间的情况，该选用何种壳元合适呢，高手帮小弟出出招吧。

  谢谢，了

   S3 3-node triangular general-purpose shell, finite membrane strains (identical to element S3R) (Section 15.6.7)

S3R 3-node triangular general-purpose shell, finite membrane strains (identical to element S3) (Section 15.6.7)

S4 4-node doubly curved general-purpose shell, finite membrane strains (Section 15.6.7)

S4R 4-node doubly curved general-purpose shell, reduced integration, hourglass control, finite membrane strains (Section 15.6.7)

S4R5 4-node doubly curved thin shell, reduced integration, hourglass control, using five degrees of freedom per node (Section 15.6.7)

S8R 8-node doubly curved thick shell, reduced integration (Section 15.6.7)

S8R5 8-node doubly curved thin shell, reduced integration, using five degrees of freedom per node (Section 15.6.7)

S8RT 8-node thermally coupled quadrilateral general thick shell, biquadratic displacement, bilinear temperature in the shell surface (Section 15.6.7)

S9R5 9-node doubly curved thin shell, reduced integration, using five degrees of freedom per node (Section 15.6.7)

SAX1 2-node linear axisymmetric thin or thick shell (Section 15.6.9)

SAX2 3-node quadratic axisymmetric thin or thick shell (Section 15.6.9)

SAX2T 3-node axisymmetric thermally coupled thin or thick shell, quadratic displacement, linear temperature in the shell surface (Section 15.6.9)

SAXA1N Linear asymmetric-axisymmetric, Fourier shell element with 2 nodes in the generator direction and N Fourier modes (Section 15.6.10)

SAXA2N Quadratic asymmetric-axisymmetric, Fourier shell element with 3 nodes in the generator direction and N Fourier modes (Section 15.6.10)

SC6R 6-node triangular in-plane continuum shell wedge, general-purpose continuum shell, finite membrane strains. (Section 15.6.8)

SC8R 8-node quadrilateral in-plane general-purpose continuum shell, reduced integration with hourglass control, finite membrane strains. (Section 15.6.8)

SFM3D3 3-node triangular surface element (Section 18.2.2)

SFM3D4 4-node quadrilateral surface element (Section 18.2.2)

SFM3D4R 4-node quadrilateral surface element, reduced integration (Section 18.2.2)

SFM3D6 6-node triangular surface element (Section 18.2.2)

SFM3D8 8-node quadrilateral surface element (Section 18.2.2)

SFM3D8R 8-node quadrilateral surface element, reduced integration (Section 18.2.2)

SFMAX1 2-node linear axisymmetric surface element (Section 18.2.4)

SFMAX2 3-node quadratic axisymmetric surface element (Section 18.2.4)

SFMCL6 6-node cylindrical surface element (Section 18.2.3)

SFMCL9 9-node cylindrical surface element (Section 18.2.3)

SFMGAX1 2-node linear axisymmetric surface element, twist (Section 18.2.4)

SFMGAX2 3-node quadratic axisymmetric surface element, twist (Section 18.2.4)

SPRING1 Spring between a node and ground, acting in a fixed direction (Section 17.2.2)

SPRING2 Spring between two nodes, acting in a fixed direction (Section 17.2.2)

SPRINGA Axial spring between two nodes, whose line of action is the line joining the two nodes. This line of action may rotate in large-displacement analysis. (Section 17.2.2)

STRI3 3-node triangular facet thin shell (Section 15.6.7)

STRI65 6-node triangular thin shell, using five degrees of freedom per node (Section 15.6.7)

jxln · 发表于 2004-6-24 09:58:10

小弟在用ansys模拟时，一直得不到很好的效果，忙呼了半年，只好求助于abaqus，不知道我的问题，abaqus，是否可以得到很好的解决！
谢谢，论坛各位热心大侠！

hitzhangke · 发表于 2004-6-26 09:40:48

^_^,这个问题小弟也感兴趣,论坛热心大侠都谈谈嘛,
小弟作回托.

suotao_npu · 发表于 2004-6-26 14:43:34

如果是三维单元可以考虑用一下自适应网格

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