What is the stress strain diagram of iron copper and ceramic?

The stress-strain diagram illustrates the relationship between stress (force per unit area) and strain (deformation) for materials like iron, copper, and ceramics. Iron exhibits a ductile behavior with a clear yield point, allowing for significant plastic deformation before fracture. Copper, also ductile, shows a similar but more pronounced ability to deform plastically, with a gradual increase in stress after yielding. In contrast, ceramics are brittle, exhibiting a linear elastic behavior up to their fracture point without any significant plastic deformation, resulting in a steep stress-strain curve that drops sharply at failure.