EBK MANUFACTURING ENGINEERING & TECHNOL
EBK MANUFACTURING ENGINEERING & TECHNOL
7th Edition
ISBN: 8220100793431
Author: KALPAKJIAN
Publisher: PEARSON
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Chapter 8, Problem 54SDP

It has been noted that the strength of brittle materials (such as ceramics and glasses) is very sensitive to surface defects, such as scratches (known as notch sensitivity). Obtain several pieces of these materials, scratch them, and test them by carefully clamping them in a vise and bending them. Comment on your observations.

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A three-point bending test is performed on a silicon carbide block that is 10 cm long, 1.5 cm wide, and 0.6 cm thick, and that is supported by two separate supports.7.5 cm. The sample breaks when a bending of 0.09 mm is recorded. The flexural modulus of silicon carbide is 480 GPa. Assume that no plastic deformation has occurred. Calculate: (a) The force that caused the fracture and(b) Flexural strength.
An unknown specimen with an initial diameter of 5.25 mm experiences a reduction in diameter to 4.50 mm under a tensile load of 250 N. Calculate the engineering stress, engineering strain, true stress, and true strain at this load. Assume that the deformation is uniform throughout the entire sample, and that the volume of the sample remains constant when being pulled in tension.
A paper clip is made of wire 1 mm in diameter. If the original material from which the wire is made is a rod 50 mm in diameter, calculate the longitudinal engineering and true strains that the wire has undergone during processing.

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EBK MANUFACTURING ENGINEERING & TECHNOL

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Material Properties 101; Author: Real Engineering;https://www.youtube.com/watch?v=BHZALtqAjeM;License: Standard YouTube License, CC-BY