# Pressure units for a 1D edge on a structural model?

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Elliot Bontoft am 31 Mär. 2021
Bearbeitet: Elliot Bontoft am 5 Mai 2021
Dear all,
I have a 2D structural model that I have modelled with standard SI units and I intend to apply a force distributed evenly over an edge in the model - in essence a pressure but in 1D.
What are the units for the pressure if I apply a pressure to the edge of the model?
If I wanted to apply a force of say 1e4N, over the edge, then how could this be achieved, as Force loads must be specified on a vertex?
Thank you
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Elliot Bontoft am 31 Mär. 2021
This is possible, I just thought if i understood how the magnitude of the pressure load is interpreted on a 2D edge then i could scale it and this would be easier.
Elliot Bontoft am 2 Apr. 2021
Hi @darova, I looked into this further, you cannot apply loads to mesh nodes in MATLAB - only geometry vertices. I could break down the model to add lots of artificial vertices in a straight line on the edge of interest. This seems like a lengthy workaround, but i do not know of another way.

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### Antworten (1)

Ravi Kumar am 31 Mär. 2021
When you are solving a 2-D structural probelm (either plane stress or plane strain approximation), unit thickness is implicit. Can can scale the load to account for finite thickness based on this.
Regards,
Ravi
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Elliot Bontoft am 1 Apr. 2021
Hi Ravi, could you expand a little more on this? I am not sure I follow.
How could I access the magnitude of the unit thickness for the finite elements? As i think you are suggesting, with this information I can calculate the area (unit thickness X edge length), which allows me to calculate the correct pressure value.
Thanks

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