Lecture
This lecture covers the systematic relationships between real and nominal values, strain rates, and the concept of load in material testing. It explains the connection between nominal stress, strain rate, and the force developed by a traction machine. The lecture also delves into the tensile curve, elastic and plastic zones, and the relationship between nominal resistance and stress. Additionally, it discusses the behavior of different materials under external loads, work hardening, and the ultimate tensile strength. The instructor provides examples of traction diagrams and explains the significance of the maximum nominal stress achieved in the elastic limit.