Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.
Boundary conditions for strain based loading
Posted Oct 28, 2012, 5:25 p.m. EDT 0 Replies
Please login with a confirmed email address before reporting spam
I would like to perform a loading on a 2D specimen using Comsol to obtain a stress-strain curve for shape memory alloy (using the Ginzburg-Laundau model). To obtain the stress-strain curve following methods can be applied (refer to the figure for the nomenclature of boundaries)
(a) Displacement based loading: Constraint (Dirichlet boundary condition) the boundary 1 (in x and y direction) and load the boundary 4 in the x direction.
(b) Stress based loading: Constraint (Neumann boundary condition) the boundary 1 (in x and y direction) and apply stress flux (Neumann boundary condition) on the boundary 4 in the x direction.
(c) Strain based loading: Increment the strain loading using constant strain rate in the x direction as
strain (x component) = strain (x component) + strain rate * time
I am mainly interested in the strain based loading here. If boundary 1 is constrained, the stress curve oscillates between the first and third quadrant in the stress-strain curve. I am wondering what are the boundary conditions to be used for the strain based loading on boundaries 1, 2, 3, and 4?
Nomenclature of boundaries in the rectangular domain is attached in the jpg file.
I would appreciate if you could share your expertise.
Warm regards,
RPD
Attachments:
Hello Rakesh Dhote
Your Discussion has gone 30 days without a reply. If you still need help with COMSOL and have an on-subscription license, please visit our Support Center for help.
If you do not hold an on-subscription license, you may find an answer in another Discussion or in the Knowledge Base.