PROBLEM 3-18 GIVEN: A tension test was performed on a magnesium alloy specimen having a diameter 0.5 in. and gage length of 2 in. The resulting stress-strain diagram is shown in the figure. or (ksi) 40) 20 25 15 0.008 REQUIRED: If the specimen is stressed to 30 ksi and unloaded, determine the permanent elongation of the specimen.

PROBLEM 3-18 GIVEN: A tension test was performed on a magnesium alloy specimen having a diameter 0.5 in. and gage length of 2 in. The resulting stress-strain diagram is shown in the figure. or (ksi) 40) 20 25 15 0.008 REQUIRED: If the specimen is stressed to 30 ksi and unloaded, determine the permanent elongation of the specimen.

Materials Science And Engineering Properties

1st Edition

ISBN:9781111988609

Author:Charles Gilmore

Publisher:Charles Gilmore

Chapter6: Introduction To Mechanical Properties

Section: Chapter Questions

Problem 6.2P

See similar textbooks

Similar questions

A steel wire with a diameter of d = 1/16” is bent around a cylindrical drum with a radius ofR = 36”.(a) Determine the maximum normal strain in the wire.(b) What is the minimum acceptable radius of the drum if the maximum normal strain mustremain below yield? Consider an elastic modulus of 30000 ksi and yield stress of 100ksi.(c) If R = 36”, what is the maximum acceptable diameter of the wire if the maximum normalstrain must remain below yield?
The brass shell (αb511.6 3 10–6/°F) is fully bonded to the steel core (αs56.5 3 10–6/°F). Determine the largest allowable increase in tem-perature if the stress in the steel core is not to exceed 8 ksi.
(a) Using Animated Figure, compute the rupture lifetime for an S-590 alloy that is exposed to a tensile stress of 100 MPa at 925°C. (b) Determine the same value from the Larson-Miller plot of Animated Figure, which is for this same S-590 alloy. (a) i hours (b) i hours
Q.1 The yield stresses (oy) have been measured using steel and aluminum specimens of various grain sizes, as follows: Material D (µm) σΥ (MPa) Steel 60.5 160 136 128 Aluminum 11.1 235 100 223 (a) Determine the coefficients o and kỵ in the Hall- Petch for these two materials. (b) Determine the yield stress in each material for a grain size of d=26 um.
In unconfined compression test, the deformation dial gauge is used for stress calculation Ture Fulse
Q.1 The state of plane stress shown in figure is expected to occur in an aluminum casting. Knowing that for the aluminum alloy used σUT = 80 MPa and σUC = 200 MPa, determine whether rupture of the casting will occur. a) Using Mohr’s criterion b) Using Tresca’s yield criterion
(c) A three-point transverse bending test is conducted on a cylindrical specimen of aluminium oxide having a reported flexural strength of 390 MPa. If the specimen radius is 2.8 mm and the support point separation distance is 40 mm, predict the fracturing of the specimen when a load of 620 N is applied.
The specimen shown is made from a 25 mm diameter cylindrical steel rod with two 38 mm outer-diameter sleeves bonded to the rod as shown. Knowing that E = 200 GPa, determine (a) the load P so that the total deformation is 0.05 mm, (b) the corresponding deformation of the central portion BC. 38 mm diameter P' 25 mm diameter B 38 mm diameter C 50 mm 75 mm 50 mm
A specimen of metal of original length 80mm and original diameter 21mm was subjected to tensile a test. The load and extension at the limit of proportionality were found to be 105,000N and 0.082mm. The yield point was at a load of 112,00ON. The maximum load before the material failed was 199,000N. The final length at failure was 91mm. Calculate: i. the stress at the limit of proportionality i. the yield stress iii. the ultimate tensile stress iv. the value of Young's Modulus V. the strain at failure
The two rods are used to support a crate with weight of 2kN. The rod are made of the same material and of the same diameter. If the failure tensile normal stress for this material is 200 mPa, what is the minimum required diameter for the rods in mm? 45° 30°
At an axial load of 25 kN, a 45-mm-wide by 15-mm-thick polyimide polymer bar elongates 3.1 mm while the bar width contracts 0.18 mm. The bar is 240 mm long. At the 25-kN load, the stress in the polymer bar is less than its proportional limit. Determine (a) the modulus of elasticity. (b) Poisson's ratio. (c) the change in the bar thickness. Answers: (a) E= (b) v = (c) Athickness= i GPa mm
At an axial load of 22 kN, a 45-mm-wide by 15-mm-thick polyimide polymer bar elongates 2.8 mm while the bar width contracts 0.25 mm. The bar is 190 mm long. At the 22-kN load, the stress in the polymer bar is less than its proportional limit. Determine (a) the modulus of elasticity. (b) Poisson's ratio. (c) the change in the bar thickness