to find the pressure which is placed apon an item i will need to find out the physics of elasticity so that they can be applied to my end product for a more realistic approach. below are a few research i have found on this topic:
http://www.staff.amu.edu.pl/~romangoc/M10-elasticity.html
http://www.director-online.com/buildArticle.php?id=862
http://www.madsci.org/posts/archives/2000-05/957557758.Ph.r.html