I would like to build a standing shelf where the supports which hold each successive plank are 3D printed (to obtain special shapes).
However, I read that PLA flows under constant stress/pressure. Still, this doesn't stop the author of the article from using PLA for a hanging shelf, which obviously is subjected to constant negative pressure.
Which material suffers the least from plasticity/non elastic deformation under stress?
Answers with data for multiple materials are welcome.
I found that the phenomenon is called "creep" and is related to ISO 899, but I couldn't find any data for the common filament plastics and I don't know the theory behind it, so I'm not sure whether it's unavoidable or it appears after a threshold stress is reached.
Information: it's a living room shelf which will hold books and other stuff and is supposed to last a decade. I will of course add a safety factor and I could even fix the planks to the wall (in hidden places), but ideally the 3D printed material should have NO creep.