Crank lever mechanism
The bell crank lever mechanism as shown in the figure is part of a lifting machine. Effort and load forces are applying though points A and D respectively. ABCD lever mechanism is a rigid body and free to rotate around pin O (over ABCD plane). As a result of a strength analysis, it has been identified two critical sections B and C as shown in the figure.
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If the principal stresses of a critical element at section C is as shown in the below figure-3.
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Draw load lines for both section-B and section-C elements.
For each criteria, compute the load at which the machine component will experience initial yielding
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The bell-crank lever shown is used to change the direction and magnitude of a force. The...
The bell-crank lever shown is used to change the direction and magnitude of a force. The pin at B has a diameter of 0.65 in., and the pins at A and D have diameters of 0.5 in. The ultimate normal stress is 36 ksi in the link AD, and the ultimate shear stress is 14.5 ksi in the pins. What is the allowable load P if the factor of safety is 3.5? Q2) 1/2 in. -1/2 in 8 in. -12...
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The bell-crank lever shown is used to change the direction and magnitude of a force. The pin at B has a diameter of 0.65 in., and the pins at A and D have diameters of 0.5 in. The ultimate normal stress is 36 ksi in the link AD, and the ultimate shear stress is 14.5 ksi in the pins. What is the allowable load P if the factor of safety is 3.5? Q2) 1/2 in. -1/2 in 8 in. -12...
A slider crank mechanism is shown in the figure. Find the distance between the wrist pin W and the connecting rod 10.2 cm center C. 27.3 cm 24.90 Slider Fixed Pin Track The distance between the wrist pin W and the connecting rod center C is (Round to one decimal place as needed.) cm.
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A C-clamp shown in the figure needs to carry a minimum load, P = 25kN. It is desired that the clamp would have a rectangular cross-section as shown, such that b 2t. Assume a suitable material for the C- clamp and calculate 140 mm 45° (a) the minimum required dimensions; (b) the stresses in the 3 different cross-sections (c) Comment on the type of stresses that occur atX- 40 the various locations (d) Comment on which of the stresses in...
Diameter of pin 2 mm. All pins are in single shear.
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Consider a member with a rectangular cross section subjected to
a compressive load P which is delivered through a rigid block on
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constrained from lateral deflection in one of the directions by the
rigid guide plates illustrated. The lower end is hinged and this
allows rotations about one axis direction only. Assume the member
is...
3- (SKMMIH3/SME2113) from plastic having modulus of elasticity, E-4.0GPa a) Bar ABCD shown in Figure Q3a is made The bar consists of three segments, AB, BC, and CD. Segment AB is hollow and segments BC and CD are solids If the shortening (contraction) of bar ABCD is limited to 4.0 mm, determine the maximum allowable force P to be applied at C. (8 marks) 90 mm ΟΙ 00 mm 1080 min PL 500 mm 250 mm 250 mm Figure Q3a...
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The point loads are placed at the fixed positions shown in the figure and they are live loads. А B D E K 12 44 w * C (centre) A b f' = 32 Mpa far = 3 MPa fs, = 500 MPa E = 200 GP E = 28600 MPa A a Cross section The following values are used for the question. • 3 m load before cracking • h = 2.5 m • P=2 KN • a =...
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