Hi all:(adsbygoogle = window.adsbygoogle || []).push({});

I am fresh to engineering and have basic question.

I have a 100 inch length and 40 inch wide & 6 in depth plate , it has honeycomb structure what I mean 0.125 inch face sheet of aluminum on either side and rest (6-.125*2)is honeycomb made of alumnium.It is supportted on 4 sides.Pressure load on this is 75 psi. I need to calculate the stiffness of this plate for this load.

I know the deflection from test which is 3 inch at the center for this load.

Once I know the deflection then stiffness would be total load on the plate which is (100*40*75=300000 lbs) devided by deflection, which is 300000/3=100000lbs/in.

Do u think I am right in this.Please give some suggestions.

But i am wondering how come it is so stiff (100000 lbs/in)

thks

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Aerospace Stiffness of beam

**Physics Forums | Science Articles, Homework Help, Discussion**