Units

[Yoman228]

In ABAQUS, if I use m as length and MPa as the unit of Stress. what will be the unit of Force and density please?

 

[PamCrash]

Hi

Force in Newton
Density in tons/mm³

 

[PamCrash]

Sorry, was wrong in my previous post. Use:

Length = meter
Time = seconds
Mass = 1E6 kilogram = 1 kt (kiloton)

Derived units:

Stress: 1 MPa
Force: 1E6 N = 1 MegaNewton
Density: 1e6 kg/mm³ = 1 kt/mm³

 

[Yoman228]

Please would you kindly to check this for me.
Stress in MPa = N/mm^2 = MN/m^2, Hence Stress is MN/m, Then Force = MN as you stated.

time = s, Gravity is MN/s^2, hence Gravity = 9.81E-6 MN/s^2

Pa = kg/ms^2, so 1 MPa = 1Mkg/ms^2 = 1 ton/ms^2

so if an structure weight 1 ton, the input in ABAQUS is 1.

 

[Yoman228]

oh, forgot the most important density.

If a structure have 1000 kg/m^3 = 1 ton/m^3. so the ABAQUS input is 1.

Could anyone kindly confirm that this is correct?

 

[PamCrash]

Gravity = 9.81 m/s²

Mass unit is kt. So a structure of 1 ton = 1000 kg is to input as 1e-3

Density input is kt/mm³, which is equivalent to 1e6 kg/mm³ = 1e15 kg/m³. So 1000kg/m³ is to input as 1e12