{"id":320164,"date":"2023-11-30T07:32:14","date_gmt":"2023-11-30T07:32:14","guid":{"rendered":"\/forum\/?post_type=topic&p=320164"},"modified":"2023-12-13T11:55:36","modified_gmt":"2023-12-13T11:55:36","slug":"query-on-connection-between-shell-to-solid-element-and-shell-to-shell-element","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/query-on-connection-between-shell-to-solid-element-and-shell-to-shell-element\/","title":{"rendered":"QUERY ON CONNECTION BETWEEN SHELL TO SOLID ELEMENT AND SHELL TO SHELL ELEMENT"},"content":{"rendered":"

Dear Experts,<\/p>\n

I am doing a steady state thermal plus structural analysis in ANSYS WORKBENCH & SPACE CLAIM.<\/p>\n

The construction is a cylinder build with Shell element, Solid element and mixed of both Elements.<\/p>\n

I tried with below three approaches, but NO sucess.<\/span><\/strong><\/p>\n

——————————————————<\/span><\/strong><\/p>\n

Appraoch 1 :<\/p>\n

Fully applied shared topology. <\/p>\n

I enabled beta option in “General mechanical” and ” Allow thermal variation along shell thickness”. And enabled “Node merge option at edge”.<\/p>\n

When i run the model, thermal growth (distribution) across shell element side (through thickness or varying over surface) is not achieved. And expected deformation behaviour towards Y axis is not acheived instead FE model deformed at ceter portion.<\/p>\n

Appraoch 2 :<\/p>\n

Partial shared topology applied. Only on Shell to shell element connection .<\/p>\n

Whereas  for other connections used solid to shell element , bonded contact with “MPC” formulation and “Distributed,All direction” config. Initial contacts result checked and found okay. <\/p>\n

And enabled “Node merge option at edge”.<\/p>\n

I enabled beta option in “General mechanical” and ” Allow thermal variation along shell thickness”.<\/p>\n

When i run the model, thermal growth (distribution) across shell element side (through thickness or varying over surface) is not achieved. And expected deformation behaviour towards Y axis is not acheived instead FE model deformed at ceter portion.<\/p>\n

Appraoch 3 :<\/p>\n

Fully bonded contacts used for Shell to shell element connection and shell to solid element connection with “MPC” formulation and “Distributed,All direction” config .<\/p>\n

And enabled “Node merge option at edge”.<\/p>\n

Initial contacts result checked and found okay. <\/p>\n

I enabled beta option in “General mechanical” and ” Allow thermal variation along shell thickness”.<\/p>\n

When i run the model, thermal growth (distribution) across shell element side (through thickness or varying over surface) is not achieved. And expected deformation behaviour towards Y axis is not acheived instead FE model deformed at ceter portion.<\/p>\n

——————————————————<\/span><\/strong><\/p>\n

As i aware that Solid to shell element connection is not advisible to use shared topology due to element restrictions ( Shell element has 6 DOF whereas Solid element has only 3 DOF).<\/p>\n

 <\/p>\n

Question -1 : Kindly advise on what connections are preferable when we use solid to shell element and shell to shell element in FE model. <\/p>\n

Question -2 : And also how to achieve the thermal growth (distribution) on shell element side.<\/p>\n

Question -3 : Also i am not able to apply different temperature on cylinder which is modeled with shell element ( Example Inside temperature is 450 Deg and outside surface should be 22 Deg OR fully insulated). I tried in Element orientation with various “Z” directions (-Z and +Z) . But no sucess.<\/p>\n

Thank you in advance. Hopefully i would get clarified with your expertise.<\/p>\n

Regards<\/p>\n

AE<\/p>\n

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