(#115) How Torsion and Fatigue Break Mechanical Shafts.

Mechanical Engineering Made Simple · Mar 17, 2026 · 51m · transcript

This episode dives into the brutal gap between perfect math and real mechanical failure. We break down how a part that looks flawless in CAD can still crack, deform, creep, corrode, or catastrophically fail once it enters the real world. From torsional stress in shafts and combined stress states to fatigue crack growth, fracture mechanics, creep, fretting, corrosion, and design optimization, this is a full scale walkthrough of what actually controls whether a machine survives.

You will learn how engineers calculate twisting and bending stress, why hollow shafts outperform solid ones in…