Answer Happy

(3) What is elastic strain relaxation? Explain concisely. Use sketches as needed? (4) What is the relationship between engineering strain (e) and true strain (e)? Derive a mathematical relationship between engineering strain & and true strain e. (5) Sketch the variation with true stress and engineering stress with strain, and also explain their physical meanings. (6) Compute the resilience of Material A and Material B using the o- curves shown below. (7) Compute the toughness of Material A and Material B using the o- curves shown below. (8) Which material has higher strength, A or B? Justify your answer. (9) Which material is more resilient, A or B? What governs its resilience? Justify your answer (10) Which materials is tougher, A or B? What governs its toughness? Justify your answer. Material A 0.001 o=1,220,000€ q=300,000+1275(e)0.45 0.005 Material B 0.1 E 5