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GATE 2018 Set 2
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Lohit Kumar Yadav
IRSME. Graduated in Mechanical engineering. Secured AIR 1 in ESE 2017. Appeared for BARC, ISRO, IOCL, BPCL, BEL interviews.

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  1. GATE 2018- Set 2 By: Lohit K Yadav

  2. Biven no (e) 1R1 Co 13

  3. 2. nU31 !

  4. 2- 2 2 2 .9yl 22 70 4422

  5. A bar is subjected to a combination of a steady load of 60kN and a load fluctuating between 10kN and 90 kN. The corrected endurance limit of the bar is 150 MPa, the yield strength of the material is 480 MPa and the ultimate strength of the material is 600MP The bar cross-section is square with side a. If the factor of safety is 2, the value of a (in mm), according to the modified Goodman"s criterion, is (correct to two decimal places)

  6. CA Hen Fo st L.

  7. 2 2. Py So lN

  8. P. a2 a 2 Py So lc

  9. Fo tu 2. ul

  10. A bimetallic cylindrical bar of cross sectional area 1 m2 is made by bonding steel (Young's modulus =210 GPa) and Aluminium (Young"s modulus -70GPa) as shown in the figure. To maintain tensile axial strain of magnitude 10-6 in Steel bar and compressive axial strain of magnitude 10-6 in Aluminium bar, the magnitude of the required L/2 L/2 clamped end Steel Aluminium clamped end perfectly bonded interface (in kN) along the dicated direction is

  11. . Pe -P- P

  12. Lihih Es 2 PA A Es Es