# The math involved in bending a rod

by camacru
Tags: bending, involved, math
 P: 754 That would depend on how much the rod material can stretch and/or compress. Assuming no stretching, then the outer radius would consist of a quarter-circle having the same radius (0.892"). That arc would then have a length of 1/4 of the circumference of a 0.892" radius circle. Calculate that then add the straight lengths to it. $$C=2\pi r$$ $$\frac{1}{4}C=\frac{\pi r}{2}$$ If the material stretches, this won't be accurate though. It would be much easier to take a piece of rod of a known length, bend it, and cut off the amount you don't need. Subtract that amount (that was cut off) from your original length. That will give you the total length needed.