Manufacturing Engineering & Technology
Manufacturing Engineering & Technology
7th Edition
ISBN: 9780133128741
Author: Serope Kalpakjian, Steven Schmid
Publisher: Prentice Hall
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Chapter 3, Problem 36SDP
To determine

For the materials listed in Table 3.1, determine the specific strength and specific stiffness. Describe your observations.

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Find the toughness (or energy to cause fracture) for a metal that experiences both elastic and plastic deformation. Assume Equation 6.5 for elastic deformation, that the modulus of elasticity is 172 GPa (25 × 106 psi), and that elastic deformation terminates at a strain of 0.008. For plastic deformation, assume that the relationship between stress and strain is described by Equation 6.19, in which the values for K and n are 6900 MPa (1 × 106 psi) and 0.25, respectively. Furthermore, plastic deformation occurs between strain values of 0.008 and 0.61, at which point fracture occurs. J/m³
Explain why a maximum in stress occurs in the engineering stress—strain curve for a polycrystallinemetal deformed in tension. Why is there no maximum for the true stress— strain curve?
List three engineering components / applications that, in your judgment, need high stiffness and low weight. What material choices would you consider for these applications? What is anisotropy? Explain with specific examples of materials and anisotropic properties.

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