Question No. 12: (a) Explain the buckling of columns in detail. (b) Define factor of safety. Explain its importance in design. Discuss the factors affecting selection of it. (c) Design a bell crank lever to raise a load of 7.5 kN at short arm end. The arm lengths are 100 mm and 500 mm. The permissible stresses for lever and pin material in shear and tension are 30 MPa and 60 MPa respectively. The bearing pressure on pin is to be limited to 10 MPa. Assume lever cross section as t x 4t and fulcrum pin length as 1.5 times pin diameter.

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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Question No. 12: (a) Explain the buckling of columns in detail. (b) Define factor of safety. Explain its importance in design. Discuss the factors affecting selection of it. (c) Design a bell crank lever to raise a load of 7.5 kN at short arm end. The arm lengths are 100 mm and 500 mm. The permissible stresses for lever and pin material in shear and tension are 30 MPa and 60 MPa respectively. The bearing pressure on pin is to be limited to 10 MPa. Assume lever cross section as t x 4t and fulcrum pin length as 1.5 times pin diameter.
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