I now see in the forum that in EDEM unidirectional coupling, EDEM obtains the force on the material and then uses finite element to perform static structural analysis. So, I want to obtain the stress changes of the material on the equipment over time, that is, to perform transient calculations. Is the method of exporting data from EDEM the same as the static unidirectional coupling setting, and only Optistruct switches to explicit calculation?