[sevensor]

There's a whole academic sub-discipline in Mechanical Engineering devoted to optimizing geometries like this. Shape Optimization tries to find shapes with particular properties, e.g. minimizing material use while maximizing shear strength. You'll find hundreds of papers going back decades if you want to dig into it:

https://scholar.google.com/scholar?hl=en&as_sdt=0%2C39&q=sha...