Question

Sketch typical load/extension curves for (a) an elastic non-metallic material,(b) a brittle material and (c) a ductile material.Give a typical example of each type of material.

Answer 1

(a) A typical load/extension curve for an elastic non-metallic material is shown in Figure 1.10(a), and an example of such a material is polythene. 

(b) A typical load/extension curve for a brittle material is shown in Figure 1.10(b), and an example of such a material is cast iron. 

(c) A typical load/extension curve for a ductile material is shown in Figure 1.10(c), and an example of such a material is mild steel.