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Unformatted text preview: WebCT Quiz http://webct.mcmaster.ca/SCRIPT/MATLS_1M03_T2_06_newRestore/s... 1 of 4 21/03/2006 3:44 PM Assignment 5 (Ch 8 & 9) Name: BRYCE JONES Start time: March 21, 2006 3:44pm Number of questions: 11 Finish Help Question 1 (1 point) Which kind of fracture is associated with the transgranular crack propagation mechanism? a. Ductile b. Brittle c. Either ductile or brittle Save answer Question 2 (1 point) Estimate the maximum stress (in MPa) experienced in a brittle material if it is known that fracture occurs by the propagation of an elliptically shaped surface crack of length 0.179 mm and tip radius of curvature of 8.12 x10-3 mm when a tensile stress of 87.1 MPa is applied. Use decimal notation, digits after decimal: 0 Answer: Units: Save answer Question 3 (1 point) Suppose that a mechanical component on an aircraft is fabricated from an alloy that has a plane-strain fracture toughness of 45.4 MPa-m 1/2 ....
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- Winter '09
- Solubility, Solid solution, Phase transition