The aim of this is to model a buckling restrained brace (BRB). They don't buckle and yield both in tension and compression. Another point is that they are assumed to be pinned at two ends. The beam element can apply bending moments on the structure (beams and columns).
I am not sure if we can call it buckling, but when I used multiple truss elements (bottom brace in the figure), I had a deformed brace similar to buckling. When I used a single element, the deformed shape seemed okay, but I could not change the property of the section by the length. I checked...
Thank you for your reply. A single truss element doesn't buckle. However, I need to change the section at the end, and I need to use 3 of them.
Regarding axial connectors, I found that the section stiffness parameter(AE) is defined and Abaqus calculates the member stiffness (AE/L) based on the...
Hi,
Do you know any approach or subroutine to modify the thickness of shell elements (3d shell) through a nonlinear analysis?
I am using the implicit solver.
Thank you.
Hi,
I want to model damping in a dynamic analysis in Abaqus explicit. So I can do it by material damping and Rayleigh damping; however, there is another option as bulk viscosity that default parameters are 0.06 and 1.2 as you can see in the attached figure. They can affect dynamic responses. Do...
Thank you for the reply. Adjusting the material properties for a linear analysis could be an option; however, I am trying to model the nonlinear behavior of concrete and steel. I will follow your advice regarding verification but is there any built-in feature in Abaqus to generate beam elements...
I want to model concrete beams in Abaqus explicit that doesn't support *Rebar . I also cannot use solid or shell elements due to the scale of the structure.
I chose to create 2 beam elements for each part ( a beam with a rectangular section for concrete and an I-section beam with a near-zero...
Thanks for your reply. But I think it is not sth that I need. I need a wire beam element that I can define section with reinforcement. So I don't want to use any solid or shell elements. Both stringer reinforcement and embedded region are applicable to solids or 2d surfaces.
Best regards,
Hi everybody,
I need to model the nonlinear behavior of a large reinforced concrete structure but not with detailed solid elements. Is there any possibility in Abaqus to use beam element (like Hughes-Liu in Ls-Dyna) and define rebars inside?
Thanks
Thanks for your reply and your suggestion. Actually, I have already read literature about submodeling but I am using Abaqus for my modeling. So I need more details about the way Abaqus does it.
Hi,
Do you have any reference about the function Abaqus uses for boundary response interpolation in the submodeling technique? I checked the documentation, it doesn't mention the type. Is it only a simple linear interpolation or does Abaqus use the element shape function for interpolation...
Yes, I see. Because I want to model the ductile fracture of the plate (large plastic deformation) it is important to use fine mesh in pits. Therefore num of the elements is high and using reduced integration is a great help. on the other hand, the first-order tetrahedrons are so stiff and the...
Thanks for your reply. Actually, the problem is that when the number of pits increases (assume 100 pits for example that can overlap) the partitioning also does not work, and meshing reaches an error even when I tried manually. Do you think Hypermesh or Ansa can do meshing in a completely...
Hi everybody,
I am trying to mesh a rectangular plate with hexahedral elements (not tetrahedral) in Abaqus. But one side of the plate is covered by elliptical pits as shown in the attached figure (pits are random in place and geometry). As a result, the Abaqus mesher can not do it automatically...
