In practice, I can imagine that accounting for folding makes the number of forces increase rapidly. For example, if we folded a paper multiple times and then unfolded it and pulled on opposite corners, there are a lot of different forces resisting the pull. Moreover, if you pull hard enough, the paper becomes completely flat. In practice, do we actually calculate each of these forces, or do we ignore the small forces, ones that we determine don't matter (or does this make simulation look bad)? For example, if we made a very soft crease as opposed to a very hard crease, or maybe ignoring the folds altogether when the paper is flat and the main force is the paper resisting tearing.
In practice, I can imagine that accounting for folding makes the number of forces increase rapidly. For example, if we folded a paper multiple times and then unfolded it and pulled on opposite corners, there are a lot of different forces resisting the pull. Moreover, if you pull hard enough, the paper becomes completely flat. In practice, do we actually calculate each of these forces, or do we ignore the small forces, ones that we determine don't matter (or does this make simulation look bad)? For example, if we made a very soft crease as opposed to a very hard crease, or maybe ignoring the folds altogether when the paper is flat and the main force is the paper resisting tearing.