Mass Scaling in Explicit Dynamics
I was running an Explicit Dynamics simulation of a cell phone drop test (as part of Ansys Innovation Course called Strain in Deformation Analysis). In the simulation mass scaling was used and after getting the results I started wondering how much did the mass scaling affect to the mass of the cell phone.
I got the following results as shown in the figures:
Original mass of the phone body: 0.48685 kg
After this I scoped MASSALL result to the phone body and got this result:
Throughout the simulation the total mass of the phone body is 0.70212 kg. I guess this means that the mass scaling has increased the total mass of the phone body to 0.70212 kg and the value does not change during the simulation since there is not so much distortion of the elements during the simulation that the values would change?
However, after this I ran the same simulation with mass scaling turned off and got this result:
Now at the end of the simulation the mass of the phone has also increased from original 0.48685 kg to 0.58612 kg even though the mass scaling should not be used? Is there something else changing the mass of the phone body or does the mass scaling still somehow affect in the background?