MEEG 3013 Name: __________________________________ (Underline your last name.) Test I ( )ID#: _____________________________________ 1.(30%) At room temperature, a gap b= 0.02 in. exists between the aluminum rod Aof 2-in. diameter (613.1 10/ Faα−=×°, 610.110 psiaE=×) and the steel rod Bof 1.5-in. diameter (66.510/ Fsα−=×°, 62910 psisE=×) as shown. If a tempera-ture rise of T∆occurs and the stress developed in the alumi-num rod is 4 ksi,aσ= −determine the value of .T∆2.(30%) The horizontal shaft ADis attached to a fixed base at Dand is subjected to the torques as shown, where 200 lb ftAT=and 1500 lb ft.BT=⋅A 2-in.-diameter hole has been drilled into portion CDof the shaft. Knowing that the entire shaft is made of steel for which 611.210 psiG=×, determine the angle of twist Aφat endA. Fig. P2 Fig. P3 3.A fabric used in air-inflated structures is subjected to a biaxial loading that results in normal stresses xσ= 150 MPa and zσ= 180 MPa. The properties of the fabric can be approximated as E= 87 GPa and ν= 0.34. Circle on this test sheet
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