Hysteresis modeling in ABAQUS

[rumhrg]

Hi. My name is Hamid. I am using ABAQUS v6.4 to model the hysteretic behavior of tire tread block in contact with road. I use the hysteresis model implemented in ABAQUS. I want to show the effect of creep rate dependency on contact variables such as contact pressure, etc. so I need to know which of four parameters in hysteresis model (S, m, c and A) should be changed in order to take the variation in level of hysteresis behavior into account. In other words, if we increase, for example, the value of A what would be the effect on hysteretic behavior (increase or decrease?). Thank you in advance.

[Jorgen]

Hello Hamid,

As is likely well-known on this web-site :wink: , the *Hysteresis model, which is also called the Bergstrom-Boyce (BB) model, is a model that I developed a few years ago while I was at MIT. Now, it turns out that the ABAQUS implementation of the BB-model has some unfortunate limitations. For example, it is only available for implicit simulations, no support for Mullins effect, no support for temperature effects, and sometimes poor robustness. For these reasons I have continued to develop and refine my own implementation (http://www.polymerfem.com/modules.php?name=User_Subroutines) of the BB-model.

Back to your question. The amount of hysteresis is dependent on all four of the parameters (S, A, m, and C), but is most strongly dependent on:
:arrow: S: larger S gives more hysteresis
:arrow: A: If A is really small or really large, then there is not much hysteresis


Best of luck,
Jorgen

[rumhrg]

Thank you very much for your reply. I would like also to know that can I use CENER (viscous dissipation energy) as measure of dissipated part of stain energy in onle cycle. Is it also true that this value is calculated per unit time ? I mean after calculation of CENER we must mutiply it to number of cycle per unit time to calculate the actual value of dissipated energy in a cycle

[Jorgen]

The output variable CENER in ABAQUS is the dissipated energy per unit volume. I have not used this variable for a while, but my understanding is that is it not calculated per unit time. If is was per unit time then it would not be an energy but an effect.

- Jorgen