Hello,
I hope this finds you well.
I am trying to perform a stress relaxation experiment in which the force increases gradually from 0 to the maximum force of 42 N. After reaching 42N, it is held constant for 50 secs and then decreases gradually.
Just to take things bit by bit, I decided to start with the gradual increase in force from 0 to 42N.
To achieve this, i used a force controller and a parametric equation of -(1+(1+t)) so that the force will increase gradually to the maximum force. the picture below shows what I did.
However, while running the simulation, the punch started increasing gradually but I think this stopped immediately this comes in contact with the particles.
So using the analyst I plotted the total force against time and did not see any notable increase in the force from 0 to 42. I have included a picture of the plot for the punch and the particles.
Please I will appreciate any assistance on this.
I have also included a video of the compression process.
Thank you.


