Tracking displacement on a thermal actuator after remove voltage source

Hello,

I am new in comsol. Now, I am trying to simulate displacement of a thermal actuator under 5V. I am using the time-dependent modal. I can get results of stress, displacement, and temperature. However, I would like to konw how to study the displacement after I removed the 5V volatge source. For example, I want to apply 5V for 1s then turn it off. For a time-dependent study, I would like to know what will happen within 2s (0-1s, 5V; 1-2s, 0V). How to set this condition in comsol. My comsol model is attached.

Thanks,

Charlie