Questions from Mechanics


Q: An element in plane stress is subjected to stresses σx = 105

An element in plane stress is subjected to stresses σx = 105 MPa, σy = 75 MPa, and τxy = 25 MPa (see the figure for Problem 1). Determine the principal stresses and sh...

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Q: A sign for an automobile service station is supported by two aluminum

A sign for an automobile service station is supported by two aluminum poles of hollow circular cross section, as shown in the figure. The poles are being designed to resist a wind pressure of 75 lb/ft...

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Q: An element in plane stress is subjected to stresses σx = 25500

An element in plane stress is subjected to stresses σx = 25500 psi, σy = 22000 psi, and τxy = 1900 psi (see the figure for Problem 1). Determine the principal stresses...

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Q: The stresses acting on element A in the web of a train

The stresses acting on element A in the web of a train rail are found to be 40 MPa tension in the horizontal direction and -160 MPa compression in the vertical direction. Also, shear stresses of magni...

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Q: The normal and shear stresses acting on element A are 6500 psi

The normal and shear stresses acting on element A are 6500 psi, 17,300 psi, and 2900 psi (see the figure b for Problem 5). Determine the maximum shear stresses and associated normal stresses and show...

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Q: An element in plane stress from the fuselage of an airplane is

An element in plane stress from the fuselage of an airplane is subjected to compressive stresses of magnitude -35 MPa in the horizontal direction and tensile stresses of magnitude 6.5 MPa in the verti...

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Q: The stresses acting on element B in the web of a wide

The stresses acting on element B in the web of a wide-flange beam are found to be -14,000 psi compression in the horizontal direction and 2600 psi compression in the vertical direction. Also, shear st...

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Q: The normal and shear stresses acting on element B are σx =

The normal and shear stresses acting on element B are σx = -46 MPa, σy = -13 MPa, and τxy = 21 MPa (see figure for Problem 10). Determine the maximum shear stresses an...

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Q: The stresses on an element are σx = -300 psi and

The stresses on an element are σx = -300 psi and σy = -600 psi. Find the maximum shear stresses on the element and show them on a sketch of a properly oriented element.

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Q: A simply supported beam is subjected to two point loads as shown

A simply supported beam is subjected to two point loads as shown in the figure. The stresses on element A are τxy = –20 kPa. Find the principal stresses on element A and s...

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