For those who have an understanding of the types and magnitudes of the forces going on between the parts, could someone perhaps estimate the range or give a number that one would require the following parts’ materials to be at in terms of things like ultimate tensile strength, tensile modulus, elongation at break. Any estimated ranges or numbers would be helpful. Thanks in advance.
we have been using 3d printed PC-ABS parts for the biped and quadruped robots for many years. This material has a high impact resistance but pretty average or low tensile strength and stiffness compared to other 3d printing materials that are available now. (PC-ABS Datasheet)
We never had any issues regarding the tensile strength or stiffness during standard operations like balancing or walking.
We did crack or break a part once in a while - but that was caused by hard impacts with the ground or violent self-collisions.
If you are concerned about the mechanical properties of the material you could order parts with superior mechanical properties from a 3d printing service company that has a selective laser sintering printer. For example from Quickparts using the Duraform HST material. (Duraform HST Datasheet)
Best wishes. Felix
Thank you very much for this information