Machine Design
Given data for bracket is P=20kN, e=100mm, S(yt)=400N/mm², FS=3. Find the direct shear stress in bolts if diameter=18mm.
a) 16.9N/mm²
b) 19.6 N/mm²
c) 78.6 N/mm²
d) 76.8 N/mm²
Homework Answers
Answer: b
Explanation: Direct shear stress=one fourth of P/A.
Machine Design
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Machine Design
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Machine Design
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Machine Design
A wall bracket is attached to the wall by means of 2 identical bolts, one at A and one at B. The force of 20kN acts at a distance of 400mm. Bolt A lies at a distance of 50mm from axis of tilt and bolt B 500mm. Allowable shear stress in the bolts is 100N/mm² and tensile is 40N/mm². Which bolt is used a criterion for designing?a) Ab) Bc) A or Bd) None of the listed
Machine Design Questions and Answers – Eccentric Loaded Bolted Joints
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Part 1 A cantilever flexural member is fabricated by bolting two identical cold-rolled steel channels back-to-back,...
Part 1
A cantilever flexural member is fabricated by bolting two
identical cold-rolled steel channels back-to-back, as shown. The
cantilever beam has a span of L = 1300 mm and supports a
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dimensions of the built-up shape are shown, where d = 40
mm, w = 65 mm, and t = 3 mm. The effect of the
rounded corners can be neglected in determining the section
properties for the built-up shape....
Answer: d= 21.8 mm, where I = 64.3 x 10^-6 m^4 and Q= 388 x 10^-6...
Answer: d= 21.8 mm, where I = 64.3 x 10^-6 m^4 and Q= 388 x
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Please take P=1501.6 N
Remaining time: 145:05 1 2 3 4 5 6 Question 6 Force of P = 1500 + S N is applied to the rigid arm ABC as shown in the figure. Determine the average shear stress developed in the 6-mm diameter pin B that is subjected to double shear. What is the minimum required diameter d of steel rod CD to the nearest mm. Apply a factor of safety F.S. = 1.5 against yielding. 0,= 300...
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A wall bracket is attached to the wall by means of 2 identical bolts, one at A and one at B. The force of 20kN acts at a distance of 400mm. Bolt A lies at a distance of 50mm from axis of tilt and bolt B 500mm. Allowable shear stress in the bolts is 100N/mm² and tensile is 40N/mm². Which bolt is used a criterion for designing?a) Ab) Bc) A or Bd) None of the listed
In the following figure, two plates are fastened by means of two bolts. The yield strength of bolt is 400N/mm² and factor of safety is 4. Determine the permissible shear stress in the bolts.a) 100N/mm²b) 50N/mm²c) 25N/mm²d) 75N/mm²
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Part 1
A cantilever flexural member is fabricated by bolting two
identical cold-rolled steel channels back-to-back, as shown. The
cantilever beam has a span of L = 1300 mm and supports a
concentrated load of P = 500 N. The cross-sectional
dimensions of the built-up shape are shown, where d = 40
mm, w = 65 mm, and t = 3 mm. The effect of the
rounded corners can be neglected in determining the section
properties for the built-up shape....
Answer: d= 21.8 mm, where I = 64.3 x 10^-6 m^4 and Q= 388 x
10^-6 m^3
HW: 6-2-9 Two channels are connected to form the cross section shown below. The pair of bolts are spaced every s= 200mm along the 6.5m length of the beam. Given the properties for each channel below, find the minimum bolt diameter knowing the allowable average shear stress in the bolts is 25MPa. Answer(s): KN 22N 1.25m 1.25m X= 45 6.5m Cross Section Per...
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Remaining time: 145:05 1 2 3 4 5 6 Question 6 Force of P = 1500 + S N is applied to the rigid arm ABC as shown in the figure. Determine the average shear stress developed in the 6-mm diameter pin B that is subjected to double shear. What is the minimum required diameter d of steel rod CD to the nearest mm. Apply a factor of safety F.S. = 1.5 against yielding. 0,= 300...
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