Consistent Unit System in LS Dyna

Explicit Dynamics software LS Dyna has no default unit system. The user needs to provide all the values in a consistent system according to which the solver gives results. If the user inputs mass in Tonnes and length in meters, the solver will assume the length to be in 'mm'

The Definition of a consistent system of units as explained by Dynasupport is as follows:

• 1 force unit = 1 mass unit * 1 acceleration unit
• 1 acceleration unit = 1 length unit / (1 time unit)^2
• 1 density unit = 1 mass unit / (1 length unit)^3

The following table displays the units which be used together:

Consistent Unit Systems in LS Dyna

Source [http://www.dynasupport.com/howtos/general/consistent-units]