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.
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.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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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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