I am looking for advice on calculating clamp force. I have tried some cool phone apps, and online calculators but they all ask for information I cant seem to find. FIMM TECH has a really nice app with all the tools you could ask for but it still ask's for "required tonnage per sq. area". I have no clue where to get this number since the material supplier doesn't give that information. The material I use is TPE and I would be fine using a "generic" number for TPE if there is one but I have no clue what that number is.