New Physical Dimension "SS" = Stress

[derpmann]

Dear Colleagues,
for the exchange of simulation data we need the physical dimension stress
(german: "mechanische Spannung").
In this context "stress" is the absolute value of force per area.
The default unit is Pascal (Pa) N/(m*m).
I propose the PD code SS.

[DiVe]

Dear Peter,
you are right that this dimension is missing. But in principle it is very similar to pressure. Looking at the base physical dimensions it is more or less identical "Pa".
So the question is if we need this additional PD to make clear the difference between pressure (may coming from a gas generator and acting on a surface)
and stress that occurs in the material as a reaction to forces/loads.

No matter what we decide here finally I personally would prefer to avoid the "SS" and select a different abbreviation. What is actually occupied by other PD's is
SA; Solid angle (steradiant)
SE; Sensitivity
SP; Peak Sound Pressure Level
ST; Strain

So may an alternative for stress could be: SR?

Bye,
Dirk

[DiVe]

Decided in Online Meeting at the 01.12. 2010.
Implemented in db 1.6p5