CE 203 structural Mechanics I

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CE 203- structural Mechanics I

• Lecture 4
• Stress
• Sec. 1.4-1.5

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Can we calculate the stress in AC What about at
B? What about the bolts? What are the different
types of stresses that we see here?
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Average shear stress t V/A
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Shear stress
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Shear stress
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Consider equilibrium of the element shown
subjected to pure shear (the shown shear stress)
Equilibrium requirements are S Fy 0 S Mx
0 Tells us that all four stresses must Have
equal magnitude, and opposite direction at corners
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Ex. 1.10-P-36
Calculate average normal and shear stress acting
on material along section a-a and section b-b
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Ex. 1.11. P-38
10 mm dia. Steel rod is used to fasten the wooden
strut into a wall. Compute average shear stress
in rod. Compute the shear stress along the two
shaded planes of the strut
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