In the Martian movie Watney patched a broken door to the martian surface with plastic tarp and duct tape.
The pressure on Mars is 0.5 kPa, which is 200 times smaller, that on Earth (100 kPa), i.e. it is approximately vacuum outside.
The pressure inside is from 0.5 to 1 of atmospheres (depending on it's composition which is not clear from the movie).
So, we have 0.5 atmosphere pressing onto tarp.
1 atmosphere is 10 metric tons per square meter. The surface of the opening was more than 6 square meters. I don't remember visually the radius of the opening, but probably it was enough to human height passing, i.e. 2 * 1 meters. Pi * 1^2 ~ 3.
So, we have 30 tons pressing onto the door.
Although, I can agree that plain new plastic can handle such a pressure, I can't believe it is possible to tie edges so that this huge tension would distribute equally.
The question is: was there some examples of closing such big openings with plastic in reality?
Or what specialists are saying?