Lets assume we have a mechanical element from uniform material that is supposed to work in a static load conditions. Moreover lets assume there is no gravity or gravity is negligible. Are there any examples when reducing the element mass/volume actually gives an element more strength? I mean pure strength, no strength to weight ratio, the element cost is also irrelevant in this case.
I have mechanics lectures some time ago and if I remember correctly, the lecturer have provided an example of that. Unfortunately I cannot remind myself any details about that. Maybe the "trick" was that he reduced the mass simultaneously changing the shape a little bit in a way that some pressure concentration was dispersed?
Unfortunately I cannot produce or find any example of that now and I am not even sure if I remember this all correctly.
I will appreciate any help.