I have several sizes of tubes, 1.5 cm diameter, 2.5 cm diameter, 3.5 cm diameter (give or take). All are 10 centimeter long, made of PE with PP cap. They have a conical bottom which adds another 2 centimeters.

I want to know the total pressure on the walls when it is at vacuum, at any given height. Where would the force be the highest, and where would it be the lowest?

To take the entire force into the equation, i know i needed a height, but all i can do is calculate the entire force of the total distance, not if the properties of the material are exceeded at any time in any direction, which would make the entire tube fail. Irregular shapes like the cap and the bottom make calculating this even more difficult, as a different force distribution is applied to this. So i took 1/4th of pi as a distance on either side to calculate. 1,5 cm would turn into 1.1781 cm long as a maximum force applied to every bit. And the 2.5 cm would be a 1.9635 cm long bit of maximum shared force. Etc

Is this a correct way to estimate the total force applied to the walls at vacuum? And what is a better way to do this?

I know about P = F/A = (m*g)/A, but this doesn't apply for imperfect materials. As force is also applied inside the material, to counter the force of the pressure.