Questions from Mechanics

Q: A rigid bar ACB is supported on a fulcrum at C and

A rigid bar ACB is supported on a fulcrum at C and loaded by a force P at end B (see figure). Three identical wires made of an elastoplastic material (yield stress σY and modulus of elastic...

Q: Two wood box beams (beams A and B) have the

Two wood box beams (beams A and B) have the same outside dimensions (200 mm × 360 mm) and the same thickness (t = 2 0mm) throughout, as shown in the figure. Both beams are formed by naili...

Q: The structure shown in the figure consists of a horizontal rigid bar

The structure shown in the figure consists of a horizontal rigid bar ABCD supported by two steel wires: one of length L and the other of length 3L/4. Both wires have cross-sectional area A and are mad...

Q: Two cables, each having a length L of approximately 40 m

Two cables, each having a length L of approximately 40 m, support a loaded container of weight W (see figure). The cables, which have an effective cross- sectional area A = 48.0mm2 and effective modul...

Q: A hollow circular tube T of a length L = 15 in

A hollow circular tube T of a length L = 15 in is uniformly compressed by a force P acting through a rigid plate (see figure). The outside and inside diameters of the tube are 3.0 and 2.75 in., respec...

Q: A prismatic bar in tension has a length L = 2.

A prismatic bar in tension has a length L = 2.0m and cross-sectional area A = 249 mm2. The material of the bar has the stress-strain curve shown in the figure. Determine the elongation d of the bar fo...

Q: An aluminum bar subjected to tensile forces P has a length L

An aluminum bar subjected to tensile forces P has a length L = 150 in. and cross-sectional area A = 2.0 in2 The stress-strain behavior of the aluminum may be represented approximately by the bilinear...

Q: Two identical bars AB and BC support a vertical load P (

Two identical bars AB and BC support a vertical load P (see figure). The bars are made of steel having a stress-strain curve that may be idealized as elastoplastic with yield stress σY. Eac...

Q: A stepped bar ACB with circular cross sections is held between rigid

A stepped bar ACB with circular cross sections is held between rigid supports and loaded by an axial force P at mid length (see figure). The diameters for the two parts of the bar are d1 = 20 mm and d...

Q: A hollow wood beam with plywood webs has the cross-sectional

A hollow wood beam with plywood webs has the cross-sectional dimensions shown in the figure. The plywood is attached to the flanges by means of small nails. Each nail has an allowable load in shear of...