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2. a) Interpret the following properties of brittle fracture and ductile fracture in terms of: i. Fracture surface ii.
Posted: Thu Jul 14, 2022 3:33 pm
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- 2 A Interpret The Following Properties Of Brittle Fracture And Ductile Fracture In Terms Of I Fracture Surface Ii 1 (65.37 KiB) Viewed 30 times
2. a) Interpret the following properties of brittle fracture and ductile fracture in terms of: i. Fracture surface ii. Energy absorption iii. Crack propagation [4 marks] [4 marks] [4 marks] iv. Choose the preferred mode of fracture with ONE (1) reason [ 2 marks] b) i. A metal with an internal crack is loaded with a tensile stress of 20MPa. If the crack length and the radius of curvature are 3.6×10−2 mm and 1.8×10−4 mm, compute its maximum stress. [4 marks] ii. Given that the modulus of elasticity of the metal is 100GPa and the specific surface energy is 3.5 J/m2, compute its critical stress. [4 marks] c) An impact test was done on specimen M and R and the results are shown in Fig. Q2(c) and Table Q2(c). Based on the obtained results, choose whether specimen M or R is brittle or ductile in terms of: i. Impact strength [4 marks] ii. Fracture surface [4 marks]