Recent content by amanmahajan

Hello Mech_engineer, I have successfully modeled the tire to a close approximation of the real scenario. Can you now please guide me through the process of steps needed to analyze its rolling on a surface to see the stress variation Thanks Aman

Hello Mech_Engineer, My advisor first wants me to get a steady state rolling analysis to work and then I will add the reinforcements to the rubber. That's why I asked for your help to get started on the analysis for rolling. Thanks Aman

Hello Mech_Engineer, I was able to sort out the problem related to the surface and tire contact. My next step in the analysis is to check the stresses induced in the tire as it rolls on the ground. Can you advise me some steps to get started with that. Thanks for all your help

Mech_Engineer, Thanks for your reply. Here is the problem, The sheet below is simulated as a road surface. If I remove the internal pressure on the tire and displace the sheet upward by 1 mm, the solution converges. This is the case where the sheet is a flexible steel. However, if I...

I am now trying to analyze the same tire by applying contact conditions between the tire and a surface below it. The surface has been modeled as a plate underneath the tire and I have specified frictionless contact. I try to press the tire against the surface, keeping the inner pressure as...

AlephZero & Mech_Engineer, I didn't think of it. I found my mistake. When I reduced the pressure significantly to 0.06 psi, The solver was able to converge. Thanks for all your help. I will go ahead into my analysis now and will post any further problems that I face. Thanks again.

For now I am just modeling it as a single rubber entity. I have not yet considered the steel reinforcements that go into it.

That makes sense. However, the pressure that I applied is the recommended maximum pressure for the tire. But I see what you mean. I'll decrease the load.

I am applying a pressure of 0.7 Mpa. No, I have not tried to apply a lower value of pressure on the tire yet to see if that works ok. I will be doing that now to see if I get some convergence. Thanks

Mech_Engineer, I tried the simulation changes that you had recommended but I am still facing the same problem.

Mech_Engineer Thank you for your reply. I will try what you suggested and get back to you after that.

Mech_Engineer, The convergence curve begins from below, oscillates about the main line. I do get points in the run where there is convergence but the last two or three points don't converge leading to no solution. The boundary conditions are alright because if I apply steel as the material...

two more errors continued.

Following are the error messages that I obtained: substeps: initial: 20 minimum: 10 maximum: 100

Mech_Engineer, I used program controlled but that failed So I used substeps as Initial - 100 Minimum - 10 Maximum - 1000 Using this too the solver ran for a long time but it didn't solve. I increased the Newton raphson residuals to 4 to see where the force convergence was a problem...