This preview shows pages 1–3. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: CHAPTER 6 MECHANICAL PROPERTIES OF METALS PROBLEM SOLUTIONS 6.9 This problem asks that we calculate the elongation l of a specimen of steel the stressstrain behavior of which is shown in Figure 6.24. First it becomes necessary to compute the stress when a load of 65,250 N is applied as = F A o = F d o 2 2 = 65, 250 N 8.5 x 10 3 m 2 2 = 1150 MPa (170,000 psi) Referring to Figure 6.24, at this stress level we are in the elastic region on the stressstrain curve, which corresponds to a strain of 0.0054. Now, utilization of Equation (6.2) yields l = l o = (0.0054)(80 mm) = 0.43 mm (0.017 in.) 6.16 This problem asks that we compute Poisson's ratio for the metal alloy. From Equations (6.5) and (6.1) z = E = F / A o E = F d o 2 2 E = 4 F d o 2 E Since the transverse strain x is just x = d d o and Poisson's ratio is defined by Equation (6.8) then 113 =  x z =...
View Full
Document
 Spring '11
 Staff
 Strain, Stress

Click to edit the document details