Axial Connector in ABAQUS: A Comprehensive Guide

When it comes to simulating physical connections in ABAQUS, the axial connector takes center stage. In this video, we delve into the intricacies of utilizing axial connectors, specifically focusing on scenarios where linear or non-linear stiffness is defined-a commonplace in engineering simulations.
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[@janferino158]

Your guide was very useful for me, thank you.

[@ammarvanank]

Hello sir, could you please suggest a literature/ video tutorial regarding Non Absorbing Boundary condition (spring and dashpot type) in Soil Structure Interaction analysis.
I am working on Dam-Reservoir-Foundation analysis and trying to disseminate seismic waves traveling in a finite foundation medium...

[@eng.renatocarvalho]

Hello Ammarvanank, I don’t have any on top of my head. This is not an area (Soil Structure) that I’ve worked before.

[@tonywilliams5340]

How would you use this to simulate a cable or rope? Where you get it to only have tension and no compression

[@eng.renatocarvalho]

@@tonywilliams5340 you will have to define a force versus displacement curve in which for positive displacement (traction) there will be a specific stiffness, and for negative displacement (compression) there’s no stiffness. I do this to model the suspension jounce bumper, but in this case it’s the opposite (there’s only stiffness for compression)

[@tonywilliams5340]

@@eng.renatocarvalho Will it give it the rigidity of a taught wire, similar to the rigid axial connector? How do I make it 0, do I just make it really low (like F = -0.01, u = 10)?

[@eng.renatocarvalho]

@@tonywilliams5340 in the case of zero stiffness for compression, you should create to points in the stiffness curve like this: for displacement equals 0, force equals 0; for displacement equals -100, force equals 0. If you have a deflection greater than -100, then Abaqus will extrapolate using the inclination defined by the last 2 points. Therefore it will keep force equals 0.

[@youngmocker7122]

Hello sir, I am trying to use the connector axial nonlinear damping, defining force & velocity, to simulate a viscous damper behavior under simple cyclic motion (displacement over time) using sin wave, i have displacement versus force data which have been collected from the lab, i found the velocity for each time increment, my question is, for nonlinear force & velocity data, do i need to define positive and negative forces and velocities, or only positive data are enough to describe the behavior in both directions?, viscous damper should have the same behavior in both directions, and also Nice video, thanks for your efforts, i have been waiting for the nonlinear damping video you talked about 😅.

[@eng.renatocarvalho]

You should define the negative part of the curve as well because if not, Abaqus will extrapolate linearly or as a constant level of force dependying on the option you choose for extrapolation. Let me know if it worked. You can contact me through email as well if you'd like to (my email: [e-mail])

[@youngmocker7122]

@@eng.renatocarvalho Wow, I didn't expect a reply in such short time 😊 Got it, I will try it out and let you know through your email, thanks again 🙏