Lecture 03: Engineering Materials & Their Properties-3

This lecture covers the following concepts:
Flow Curve, Compression Test - Engineering Stress and strain in Compression,
Tensile Test vs. Compression Test, Testing of Brittle Materials,
Transverse Rupture Strength;
Shear Stress and Strain, Shear Elastic Stress‑Strain Relationship, Hardness Tests;
Effect of Temperature on Properties – Hot Hardness, Recrystallization in Metals, Recrystallization Temperature;
Viscosity in Fluids, Shear Stress, Shear Rate, Shear Viscosity;
Viscosity of Polymers and Flow Rate; Viscoelastic Behavior;
Physical Properties of Materials - Volumetric and Melting Properties and Thermal Properties;
Coefficient of Thermal Expansion; Specific Heat; Thermal Conductivity; Thermal Diffusivity;
Self-Assessment Questions:
How testing of brittle material differs from that of the ductile material?
What is transverse rupture strength of a material?
What is the difference between the true and the engineering stress-strain curve?
What is the property of material when its strength increases with the increase in strain?
How the stiffness is defined in elastic and perfectly plastic materials?