Thin-Solid Meshing / Bending and Membrane Stresses
Thin-Solid Meshing / Bending and Membrane Stresses
(OP)
My situation:
I'm trying to find the membrane and bending stress of a solid model (see attached image) using workbench in ANSYS 14.0.
The ANSYS help guide says that I need to use the "thin-solid meshing option" for the membrane and bending stress, and that it needs to be solved in the Mechanical APDL Solver.
From my understanding so far, I need to mesh the model in solid elements and then cover it with a thin layer of shell elements to capture the membrane and bending stress. But this doesn't seem correct according to this post: https://forum.solidworks.com/thread/81340
I'm an engineering student (this isn't coursework) and a new user of workbench (I have some previous experience in simple APDL). Saying that, please don't hesitate to correct me because I only have a basic understanding of structural mechanics and the ANSYS software.
My questions:
-Does "to be solved in the Mechanical APDL Solver" mean that I need to go back and redo the model (geometry,loads,meshing,etc) in APDL? From what I understand workbench exports a file to the APDL solver in the background for the solution, but I'm not sure if that's what the above mentioned phrase is referring to.
-Will a shell model (no solid elements) give me the correct results for bending stresses? Can I enter in a virtual thickness/stiffness for the shell body to have the same stiffness characteristics as a solid body? I have cut the body into several parts to facilitate meshing (see attached image), but I'm not sure if that makes using shell elements more difficult....
-If a shell model won't yield the correct results, is there anyway to apply a shell layer to the outside of a solid model (in workbench or APDL)?
Thanks for your time!
Nolan
I'm trying to find the membrane and bending stress of a solid model (see attached image) using workbench in ANSYS 14.0.
The ANSYS help guide says that I need to use the "thin-solid meshing option" for the membrane and bending stress, and that it needs to be solved in the Mechanical APDL Solver.
From my understanding so far, I need to mesh the model in solid elements and then cover it with a thin layer of shell elements to capture the membrane and bending stress. But this doesn't seem correct according to this post: https://forum.solidworks.com/thread/81340
I'm an engineering student (this isn't coursework) and a new user of workbench (I have some previous experience in simple APDL). Saying that, please don't hesitate to correct me because I only have a basic understanding of structural mechanics and the ANSYS software.
My questions:
-Does "to be solved in the Mechanical APDL Solver" mean that I need to go back and redo the model (geometry,loads,meshing,etc) in APDL? From what I understand workbench exports a file to the APDL solver in the background for the solution, but I'm not sure if that's what the above mentioned phrase is referring to.
-Will a shell model (no solid elements) give me the correct results for bending stresses? Can I enter in a virtual thickness/stiffness for the shell body to have the same stiffness characteristics as a solid body? I have cut the body into several parts to facilitate meshing (see attached image), but I'm not sure if that makes using shell elements more difficult....
-If a shell model won't yield the correct results, is there anyway to apply a shell layer to the outside of a solid model (in workbench or APDL)?
Thanks for your time!
Nolan





RE: Thin-Solid Meshing / Bending and Membrane Stresses
Rick Fischer
Principal Engineer
Argonne National Laboratory
RE: Thin-Solid Meshing / Bending and Membrane Stresses
RE: Thin-Solid Meshing / Bending and Membrane Stresses
RE: Thin-Solid Meshing / Bending and Membrane Stresses
@corus, The stress classification line is modeled in ANSYS workbench with the construction geometry correct? (see attachment)
@rickfischer51, My question was more if thin-solid meshing option was only available through ANSYS Classic. Since then I've found that I can input APDL commands into workbench instead of restarting from zero in classic.
@spongebob007, I've been given the requirement to use quadratic hexahedral elements for the model, which is why I didn't use shell elements. I was considering adding a thin layer of shell elements but I think corus's reply has pointed me in the right direction