Quiz1 Solutions - strength of materials quiz PDF

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strength of materials quiz...

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KARABUK UNIVERSITY FACULTY OF ENGINEERING DEPARTMENT OF MECHANICAL ENGINEERING B.Sc. PROGRAM 2020-2021 ACADEMIC YEAR, AUTUMN SEMESTER STRENGTH OF MATERIALS I

SOLUTIONS OF QUIZ I Queston-1: (5 Points) What is the unit of stress? Answer: Pascal Question 2-3:

Solid cylindrical rods carry a load of P=27 kN, as shown in figure above. Rod (1) and rod (2) have diameters of 16 mm and 12 mm, respectively. If a=2.5 m, b=4 m, c=3.2 m and d=2.3 m; Determine the force (kN) in the rod (1) / rod (2). (10 Points) Determine the normal stress (MPa) in the rod (1) / rod (2). (15 Points)

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Solution:

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Question 4-5:

The bar with 400 mm2 rectangular cross-sectional area is subjected to an axial force as shown in figure above. If P=70 kN and α=55°; Determine the force (kN) perpendicular/parallel to the oblique plane AB. (10 Points) Determine the shear stress (MPa) perpendicular/parallel to the oblique plane AB. (15 Points) Solution:

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Question 6-7-8:

The rigid bar carries load P, and is supported by a link (1) and a pin type connection at C as shown in figure above. If P=47 kN, the minimum diameter of the steel pin at C is 17 mm and the allowable bearing strength of the support at C is 126 MPa, a=190 mm, b=86 mm, c=52 mm, d=111 mm; Determine the reaction force (kN) at C. (10 Points) Determine the allowable shear stress (MPa) of the pin C. (15 Points) Determine the minimum thickness of the support at C. (15 Points)

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Solution:

Question 9: (5 Points) For a steel alloy the ultimate normal strength is measured 974 MPa. If the factor of safety is 2,5, calculate the allowable normal stress (MPa) of the material. Solution:

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