Q1: The circular punch B exerts force of 2kN on the top of ...



Q1: The circular punch B exerts force of 2kN on the top of the plate A. Determine the average shear stress in the plate due to this loading . Ans.: [pic]

Q2: The bars of the truss each have a cross-sectional area of (1.25in2). If the maximum average normal stress in any bar is not to exceed 20 ksi, determine magnitude P of the loads that can be applied to the truss. Ans. P=6.82 kips

[pic]

Q3: The two members used in the steel construction are jointed together using 30ofish-mouth weld. Determine the average normal and average shear stress on the plane of each weld. Assume each inclined plane supports a horizontal force of 400 lb.

Ans. [pic]

[pic]

Q4: The bar is connected to the support using a pin having a diameter of d=1in. If the allowable tensile stress for the bar = 20 ksi, and allowable bearing stress =30 ksi, determine the dimensions w & t such that the groos section area (wt=2 in2) and what is maximum P?

Ans. w=2.5 in, t=0.8 in, and Pmax= 24 kips.

[pic]

Q5: The bar is held in equilibrium by the pin supports at A and B. Note that the support A has a single leaf and therefore it involves single shear in the pin, and the support at B has a double leaf and therefore it involves double shear. The allowable shear stress for both pins is [pic]. If x =1m, determine the maximum distributed load w the bar will support. Pins A and B each have a diameter of 3mm. Neglect any axial force in he bar. Ans. w=7.81 kN/m

[pic]

Q6: The radius of the pedestal is defined by ( [pic] m ) where y is given in meters. If the material has a density of 2500 kg/m3, determine the average normal stress at the support.

Ans. [pic]

Dr. Akram Sh. Mahmood

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[pic]

University of Anbar Strength of Materials

Engineering College Second Classroom

Civil Engineering Department Sheet No. 1

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