I am going through the MACHDYN user guide and studying the “tensile loading of a rubber strip” example. I understand everything except for the units. The units are SI which are kg, meter, second, Newton, Pascal etc., however the young’s modulus and the outputted stress are in GPa which is obviously quite a large jump. Running the simulation myself, I did not find there to be very high stress outputs that would warrant such a unit conversion. Was this possibly an error?
You would have to ask that the author of the package and thus contributor of the examples.