* 'Determine the ox 30 MPa 10 MPa 20 MPa The state of plane stress at a point is represented on the upper element shown in the figure. The lower element oriented 40° from the position shown. x 40°

why W of m = 0.42 ??????? I do not understnd this

[Elastic Properties of Materials] There is a cylindrical bar of copper do in diameter is to be deformed elastically by application of a force along the bar axis. Using the data in Table given below, determine the normal force (F) that will produce an elastic reduction of Ad in the diameter. Use do 12.0 mm; Ad = d' - do = -3 × 10-³mm x = do 1 F d' l' Metal Alloy Aluminum Brass Copper Magnesium Nickel Steel Titanium Tungsten Modulus of Elasticity GPa 69 97 110 45 207 207 107 407 106 psi 10 14 16 6.5 30 30 15.5 59 Shear Modulus 106 psi GPa 25 37 46 17 76 83 45 160 3.6 5.4 6.7 2.5 11.0 12.0 6.5 23.2 Poisson's Ratio 0.33 0.34 0.34 0.29 0.31 0.30 0.34 0.28

Justify the selection of standard rolled steel sections in mechanical design

Q3 : Rank the magnitudes of the moduli of elasticity for the following hypothetical X, Y, and Z materials from the greatest to the least.The appropriate A, B, and n parameters for these three materials are tabulated below; they yield EN in units of electron volts and r in nanometers: Material A В n 2.5 2.0 x 10-5 8. Y 2.3 8.0 x 10-6 10.5 Z 3.0 1.5 x 10-5 9.

Ductile materials have more impact strength compared to brittle materials. Select one: True False