Units System for Altair Hyperworks - Optistruct

Question

Hello, I would like to know where I can configure the unit system of the altair hyperworks program, because when configuring a material it does not tell me which unit is being worked on, as shown in the image.

Thank you very much

PaulAltair · Accepted Answer

There is no defined unit system as such, you may use any you are comfortable with, you just need to ensure the values you use for mass, distance, time and force and related values are consistent with each other, e.g. 7.85e-9 density for steel is typically Tonnes, mm, s, N system (density is therefore tonnes/mm^3, pressure and stress would be in MPa as that is N/mm^2, so modulus of steel would be 210000) There is a section in the help giving various consistent units systems.