# Job reported as finished, but the analysis is not done **URL:** \ **Category:** General Questions\ **Created:** [August 7, 2023, 7:46am UTC](https://prepomax.discourse.group/t/job-reported-as-finished-but-the-analysis-is-not-done/1023 "2023-08-07T07:46:04Z")\ **Posts on this page:** 1\ **Showing post:** 5
**Author:** ![Cimek](https://avatars.discourse-cdn.com/v4/letter/c/f0a364/32.png) [@Cimek](https://prepomax.discourse.group/u/Cimek)\ **Post date:** [August 8, 2023, 5:42am UTC](https://prepomax.discourse.group/t/job-reported-as-finished-but-the-analysis-is-not-done/1023/5 "2023-08-08T05:42:11Z")
Those values are just placeholders, for a more complex material model and the values are so unusual since the material is uncured rubber. I experimented with Johnson-Cook, but couldn’t get it to converge. You can read about it here: > [@Simulation of rolling](https://prepomax.discourse.group/t/simulation-of-rolling/996): > > Hi I have a question regarding simulating rolling of rubber. Here is what I currently have: A steal roller and a sheet of rubber that is going to get rolled. I’m using PPM v1.4.0, analysis is dynamic implicit (I couldn’t get explicit to run). The roller is tied to a reference point that is constrained in the x and y direction (i tied the outer surface of the roller, to make it rigid). There is a symmetry BC on the roller and rubber sheet in the z direction. For now the roller and th… I also found some more testing data for a similar compound here: [https://www.researchgate.net/publication/341604393\_Effect\_of\_the\_Temperature\_and\_Strain\_Rate\_on\_the\_Tension\_Response\_of\_Uncured\_Rubber\_Experiments\_and\_Modeling](https://www.researchgate.net/publication/341604393_Effect_of_the_Temperature_and_Strain_Rate_on_the_Tension_Response_of_Uncured_Rubber_Experiments_and_Modeling) I tried getting the Johnson-Cook parameters using manual curve fitting to the data from this paper using excel, but this is probably not ideal. Then because I couldn’t get it to converge I went back to bi-linear plasticity. --- _[View the full topic](https://prepomax.discourse.group/t/job-reported-as-finished-but-the-analysis-is-not-done/1023)._