The Efficient Engineer - The Incredible Strength of Bolted Joints 18042023

This video takes a detailed look at bolted joints, and how preload, the tensile force that develops in a joint as it is torqued, can significantly improve the performance of a joint. The video covers tension joints, shear joints, and joints that are subjected to combined tensile and shear loads. It also explores the different methods that can be used to control the amount of preload applied to a joint, including the torque, turn-of-nut and ultrasonic measurement methods.

The Efficient Engineer - Understanding Fatigue Failure and S-N Curves, 24062019

This video discusses the mechanisms behind fracture and how S-N curves can be used to predict the fatigue life of a component. It also discusses the effect of having a tensile mean stress and how we can use techniques like the Rainflow counting method and Miner's rule to consider complex cyclic stresses.