Mechanics of Materials
9th Edition
ISBN: 9780133254426
Author: Russell C. Hibbeler
Publisher: Prentice Hall
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Textbook Question
Chapter 6.4, Problem 6.78P
If the allowable tensile and compressive stress for the beam are (σallow)t = 2 ksi and (σallow)c = 3 ksi, respectively, determine the maximum moment M that can be applied on the cross section.
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Determine the moment M that will produce a maximum stress of 70 MPa on the cross-section.
12 mm -75 mm- -12 mm
12 mm
B
75 mm
250 mm
-- 12 mm
Determine the moment M that will produce a maximum stress of 12 ksi on the cross section.
Find the second moment of area, the location of the neutral axis, and the distances from the neutral axis to the top and
bottom surfaces. Consider that the section is transmitting a positive bending moment about the z axis, Mz, where M₂ = 10
kip-in if the dimensions of the section are given in ips units, or M₂ = 1.13 kN·m if the dimensions are in Sl units. Determine
the resulting stresses at the top and bottom surfaces and at every abrupt change in the cross section.
From the figure
Z
1 in
112
in
y
in → ← ¹ in
12
in
D
C
B
A
++
in
The area is determined to be 2.0625 in².
The distances from the neutral axis to the top and bottom surfaces are determined to be 0.858 x in and
The second moment of area is determined to be 0.447 in 4.
1.017
xin.
Chapter 6 Solutions
Mechanics of Materials
Ch. 6.2 - In each case, the beam is subjected to the...Ch. 6.2 - and then draw the shear and moment diagrams for...Ch. 6.2 - In each case, express the shear and moment...Ch. 6.2 - In each case, express the shear and moment...Ch. 6.2 - In each case, express the shear and moment...Ch. 6.2 - In each case, draw the shear and moment diagrams...Ch. 6.2 - In each case, draw the shear and moment diagrams...Ch. 6.2 - In each case, draw the shear and moment diagrams...Ch. 6.2 - In each case, draw the shear and moment diagrams...Ch. 6.2 - If the force applied to the handle of the load...
Ch. 6.2 - Draw the shear and moment diagrams for the shaft....Ch. 6.2 - The crane is used to support the engine, which has...Ch. 6.2 - Prob. 6.4PCh. 6.2 - •6–5. Draw the shear and moment diagrams for the...Ch. 6.2 - Express the internal shear and moment in terms of...Ch. 6.2 - Prob. 6.7PCh. 6.2 - Prob. 6.8PCh. 6.2 - Prob. 6.9PCh. 6.2 - Members ABC and BD of the counter chair are...Ch. 6.2 - Prob. 6.11PCh. 6.2 - A reinforced concrete pier is used to support the...Ch. 6.2 - Prob. 6.13PCh. 6.2 - The industrial robot is held in the stationary...Ch. 6.2 - Determine the placement distance a of the roller...Ch. 6.2 - Express the internal shear and moment in the...Ch. 6.2 - Draw the shear and moment diagrams for the beam,...Ch. 6.2 - Draw the shear and moment diagrams for the beam....Ch. 6.2 - Draw the shear and moment diagrams for the...Ch. 6.2 - The 150-lb man sits in the center of the boat,...Ch. 6.2 - Prob. 6.22PCh. 6.2 - The footing supports the load transmitted by the...Ch. 6.2 - Express the shear and moment in terms of x for 0 ...Ch. 6.2 - Draw the shear and moment diagrams for the beam...Ch. 6.2 - Draw the shear and moment diagrams for the beam....Ch. 6.2 - Draw the shear and moment diagrams for the beam....Ch. 6.2 - Prob. 6.29PCh. 6.2 - 6–30. The beam is bolted or pinned at A and rests...Ch. 6.2 - The support at A allows the beam to slide freely...Ch. 6.2 - The smooth pin is supported by two leaves A and B...Ch. 6.2 - The shaft is supported by a smooth thrust bearing...Ch. 6.2 - Draw the shear and moment diagrams for the...Ch. 6.2 - Draw the shear and moment diagrams for the beam....Ch. 6.2 - Prob. 6.36PCh. 6.2 - Draw the shear and moment diagrams for the beam...Ch. 6.2 - The beam is used to support a uniform load along...Ch. 6.2 - Draw the shear and moment diagrams for the double...Ch. 6.2 - Draw the shear and moment diagrams for the simply...Ch. 6.2 - The compound beam is fixed at A, pin connected at...Ch. 6.2 - Draw the shear and moment diagrams for the...Ch. 6.2 - The compound beam is fixed at A, pin connected at...Ch. 6.2 - Draw the shear and moment diagrams for the beam....Ch. 6.2 - A short link at B is used to connect beams AB and...Ch. 6.2 - 6–46. Determine the placement b of the hooks to...Ch. 6.4 - Determine the moment of inertia of the cross...Ch. 6.4 - Determine the location of the centroid, y, and the...Ch. 6.4 - In each case, show how the bending stress acts on...Ch. 6.4 - Sketch the bending stress distribution over each...Ch. 6.4 - If the beam is subjected to a bending moment of M...Ch. 6.4 - If the beam is subjected to a bending moment of M...Ch. 6.4 - If the beam is subjected to a bending moment of M...Ch. 6.4 - If the beam is subjected to a bending moment of M...Ch. 6.4 - If the beam is subjected to a bending moment of M...Ch. 6.4 - Prob. 6.47PCh. 6.4 - Determine the moment M that will produce a maximum...Ch. 6.4 - Determine the maximum tensile and compressive...Ch. 6.4 - 6–50. A member has the triangular cross section...Ch. 6.4 - Prob. 6.51PCh. 6.4 - Prob. 6.52PCh. 6.4 - Prob. 6.53PCh. 6.4 - If the built-up beam is subjected to an internal...Ch. 6.4 - If the built-up beam is subjected to an internal...Ch. 6.4 - Prob. 6.56PCh. 6.4 - Prob. 6.57PCh. 6.4 - Prob. 6.58PCh. 6.4 - Prob. 6.59PCh. 6.4 - Prob. 6.60PCh. 6.4 - 6–61. The beam is subjected to a moment of 15 kip...Ch. 6.4 - 6–62. A box beam is constructed from four pieces...Ch. 6.4 - Prob. 6.63PCh. 6.4 - The axle of the freight car is subjected to a...Ch. 6.4 - A shaft is made of a polymer having an elliptical...Ch. 6.4 - Solve Prob. 6-65 if the moment M = 50 N m is...Ch. 6.4 - Prob. 6.67PCh. 6.4 - The shaft is supported by smooth journal bearings...Ch. 6.4 - Prob. 6.69PCh. 6.4 - Prob. 6.70PCh. 6.4 - The boat has a weight of 2300 lb and a center of...Ch. 6.4 - Determine the absolute maximum bending stress in...Ch. 6.4 - Determine the smallest allowable diameter of the...Ch. 6.4 - The pin is used to connect the three links...Ch. 6.4 - The shaft is supported by a thrust bearing at A...Ch. 6.4 - Prob. 6.76PCh. 6.4 - If the beam is subjected to an internal moment of...Ch. 6.4 - If the allowable tensile and compressive stress...Ch. 6.4 - If the beam is subjected to an internal moment of...Ch. 6.4 - If the beam is subjected to a moment of M = 100 kN...Ch. 6.4 - If the beam is made of material having an...Ch. 6.4 - The shaft is supported by a smooth thrust bearing...Ch. 6.4 - The shaft is supported by a thrust bearing at A...Ch. 6.4 - If the intensity of the load w = 15 kN/m,...Ch. 6.4 - If the allowable bending stress is allow = 150...Ch. 6.4 - Prob. 6.86PCh. 6.4 - Prob. 6.87PCh. 6.4 - *6–88. If the beam has a square cross section of 9...Ch. 6.4 - If the compound beam in Prob. 642 has a square...Ch. 6.4 - If the beam in Prob. 628 has a rectangular cross...Ch. 6.4 - Determine the absolute maximum bending stress in...Ch. 6.4 - Determine, to the nearest millimeter, the smallest...Ch. 6.4 - 6–93. The wing spar ABD of a light plane is made...Ch. 6.4 - Prob. 6.94PCh. 6.4 - Prob. 6.95PCh. 6.4 - A log that is 2 ft in diameter is to be cut into a...Ch. 6.4 - A log that is 2 ft in diameter is to be cut into a...Ch. 6.4 - If the beam in Prob.63 has a rectangular cross...Ch. 6.4 - Prob. 6.99PCh. 6.4 - If d = 450 mm, determine the absolute maximum...Ch. 6.4 - If the allowable bending stress is allow = 6 MPa,...Ch. 6.4 - Prob. 6.102PCh. 6.4 - 6–103. If the overhanging beam is made of wood...Ch. 6.5 - Determine the bending stress at corners A and B....Ch. 6.5 - Determine the maximum bending stress in the beams...Ch. 6.5 - The member has a square cross section and is...Ch. 6.5 - The member has a square cross section and is...Ch. 6.5 - Consider the general case of a prismatic beam...Ch. 6.5 - 6–107. If the beam is subjected to the internal...Ch. 6.5 - 6-108. If the wood used for the T-beam has an...Ch. 6.5 - 6-109. The box beam is subjected to the internal...Ch. 6.5 - 6-110. If the wood used for the box beam has an...Ch. 6.5 - 6-111. If the beam is subjected to the internal...Ch. 6.5 - 6-112. If the beam is made from a material having...Ch. 6.5 - Prob. 6.113PCh. 6.5 - 6-114. The T-beam is subjected to a bending moment...Ch. 6.5 - 6-115. The beam has a rectangular cross section....Ch. 6.5 - For the section, Iy' = 31.7(10-6) m4, Iz' =...Ch. 6.5 - For the section, Iy' = 31.7(10-6) m4, Iz' =...Ch. 6.5 - If the applied distributed loading of w = 4 kN/m...Ch. 6.5 - Determine the maximum allowable intensity w of the...Ch. 6.9 - The composite beam is made of steel (A) bonded to...Ch. 6.9 - The composite beam is made of steel (A) bonded to...Ch. 6.9 - Segment A of the composite beam is made from...Ch. 6.9 - Segment A of the composite beam is made from...Ch. 6.9 - Prob. 6.124PCh. 6.9 - The wooden section of the beam is reinforced with...Ch. 6.9 - The wooden section of the beam is reinforced with...Ch. 6.9 - Prob. 6.127PCh. 6.9 - The steel channel is used to reinforce the wood...Ch. 6.9 - Prob. 6.129PCh. 6.9 - 6-130. The beam is made from three types of...Ch. 6.9 - 6-131. The concrete beam is reinforced with three...Ch. 6.9 - *6-132. The wide-flange section is reinforced with...Ch. 6.9 - Prob. 6.133PCh. 6.9 - If the beam is subjected to a moment of M = 45 kN...Ch. 6.9 - Prob. 6.135PCh. 6.9 - For the curved beam in Fig. 640a, show that when...Ch. 6.9 - The curved member is subjected to the moment of M...Ch. 6.9 - The curved member is made from material having an...Ch. 6.9 - The curved beam is subjected to a moment of M = 40...Ch. 6.9 - The curved beam is made from material having an...Ch. 6.9 - If P = 3 kN, determine the bending stress at...Ch. 6.9 - If the maximum bending stress at section a-a is...Ch. 6.9 - The elbow of the pipe has an outer radius of 0.75...Ch. 6.9 - Prob. 6.144PCh. 6.9 - Prob. 6.145PCh. 6.9 - Prob. 6.146PCh. 6.9 - Prob. 6.147PCh. 6.9 - Prob. 6.148PCh. 6.9 - Prob. 6.149PCh. 6.9 - 6-150. The bar is subjected to a moment of M = 153...Ch. 6.9 - Prob. 6.151PCh. 6.9 - Prob. 6.152PCh. 6.9 - Prob. 6.153PCh. 6.9 - 6-154. The simply supported notched bar is...Ch. 6.9 - Prob. 6.155PCh. 6.9 - *6-156. Determine the length L of the center...Ch. 6.9 - Prob. 6.157PCh. 6.10 - Determine the shape factor for the wide-flange...Ch. 6.10 - 6-159. The beam is made of an elastic plastic...Ch. 6.10 - Prob. 6.160PCh. 6.10 - Prob. 6.161PCh. 6.10 - Prob. 6.162PCh. 6.10 - Determine the plastic moment Mp that can be...Ch. 6.10 - Determine the shape factor for the beam. Prob....Ch. 6.10 - The beam is made of elastic perfectly plastic...Ch. 6.10 - Determine the shape factor for the beam. Prob....Ch. 6.10 - The beam is made of an elastic perfectly plastic...Ch. 6.10 - Prob. 6.168PCh. 6.10 - Prob. 6.169PCh. 6.10 - 6-170. The box beam is made from an...Ch. 6.10 - 6-171. The beam is made from elastic-perfectly...Ch. 6.10 - *6-172. Determine the shape factor for the...Ch. 6.10 - Prob. 6.173PCh. 6.10 - Prob. 6.174PCh. 6.10 - 6-175. The box beam is made from an...Ch. 6.10 - The wide-flange member is made from an elastic...Ch. 6.10 - Prob. 6.177PCh. 6.10 - The plexiglass bar has a stress-strain curve that...Ch. 6.10 - The stress-strain diagram for a titanium alloy can...Ch. 6.10 - A beam is made from polypropylene plastic and has...Ch. 6.10 - Prob. 6.181PCh. 6.10 - The bar is made of an aluminum alloy having a...Ch. 6 - Using appropriate measurements and data, explain...Ch. 6 - Determine the shape factor for the wide-flange...Ch. 6 - Prob. 6.184RPCh. 6 - The compound beam consists of two segments that...Ch. 6 - The composite beam consists of a wood core and two...Ch. 6 - 6-187. Solve Prob. 6-186 if the moment is applied...Ch. 6 - If it resists a moment of M = 125 N m, determine...Ch. 6 - Determine the maximum bending stress in the handle...Ch. 6 - The curved beam is subjected to a bending moment...Ch. 6 - Determine the shear and moment in the beam as...Ch. 6 - A wooden beam has a square cross section as shown...Ch. 6 - Draw the shear and moment diagrams for the shaft...Ch. 6 - The strut has a square cross section a by a and is...
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