Applied Statics and Strength of Materials (6th Edition)
6th Edition
ISBN: 9780133840544
Author: George F. Limbrunner, Craig D'Allaird, Leonard Spiegel
Publisher: PEARSON
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Chapter 19, Problem 19.5P
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Please Use the “NCEES FE Reference Handbook 10.0.1” which can be downloaded for Free from https://ncees.org/ as your Reference for tables and formulas
The width of the belt used if its thickness is 6 mm.
Ans. 261 mm
8. A nylon-core flat belt has an elastomer envelop; is 200 mm wide, and transmits 60 KW at a belt speed
of 25 m/s. The belt has a mass of 2 kg/m of the belt length. The belt is used in a crossed configuration to
connect a 300 mm diameter driving pulley to a 900 mm diameter driven pulley at a shaft spacing of 6 m.
A. Calculate the belt length and the angles of wrap. Ans. 13.95 m, 3.34 rad or 191.4°
B. Compute the belt tensions based on a coefficient of friction of 0.33. Ans. 1.76 KN, 1.96 KN
Please answer in this format.
Sketch:
Given:
Required:
Solution: (Please answer in detailed (step by step). Indicate labels on what you are doing/performing, for example what formula is used)
A torque To is transmitted between two flanged
shafts by means of four 20-mm bolts.
diameter of the bolt circle is 2=150mm. If the
allowable shear stress in the bolts is 90 Mpa,
what is the maximum permissible torque?
Disregard friction between between flanges.
The
To
Chapter 19 Solutions
Applied Statics and Strength of Materials (6th Edition)
Ch. 19 - Prob. 19.1PCh. 19 - Rework Problem 19.1 assuming a bearing-type...Ch. 19 - Rework Problem 19.1 assuming a bearing-type...Ch. 19 - Compute the allowable tensile load for the...Ch. 19 - Rework Problem 19.4 assuming a bearing-type...Ch. 19 - Rework Problem 19.4 assuming that the bolts are 34...Ch. 19 - Select the number and arrangement of 34 in....Ch. 19 - Calculate the allowable tensile load for the...Ch. 19 - In the connection shown, 14 in. side and end...Ch. 19 - Design the fillet welds parallel to the applied...
Ch. 19 - A fillet weld between two steel plates...Ch. 19 - Design an end connection using longitudinal welds...Ch. 19 - Calculate the allowable tensile load for the butt...Ch. 19 - Calculate the allowable tensile load for the lap...Ch. 19 - Calculate the allowable tensile load for the butt...Ch. 19 - Rework Problem 19.10 assuming that both plates are...Ch. 19 - Rework Problem 19.12 assuming that the angle is an...Ch. 19 - Two ASTM A36 steel plates, each 12 in. by 12 in. ,...Ch. 19 - Rework Problem 19.20 changing the fasteners to 34...Ch. 19 - Calculate the minimum main plate thickness for the...Ch. 19 - A roof truss tension member is made up of 2L6412...Ch. 19 - Rework Problem 19.23 changing the fasteners to six...Ch. 19 - Determine the allowable tensile load that can be...Ch. 19 - The welded connection shown is subjected to an...Ch. 19 - In Problem 19.26, use a 38 in. fillet weld, change...
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- A bolt with a square threaded screw has mean diameter of 25 mm and a pitch of 3 mm. It carries an axial thrust of 10 kN on the bolt head of 25 mm mean radius. If u = 0.12, find the force required at the end of a spanner 450 mm long, in tightening up the bolt. 3. [Ans. 110.8 N] A turn buckle with right and left hand threads is used to counle twvo railway coaches The threadsarrow_forwardA flange coupling is to connect two 57 mm shafts. The hubs of the coupling are each 111 mm in diameter and 92mm thick and the flange web are 19 mm thick. Six 16 mm bolts in a 165 mm diameter circle connect the flange.The keyway is 6 mm shorter than the hub’s thickness and key is 14 mm x 14 mm. Coupling is to transmit 45 KW at160 rpm. For all parts, yield point value in shear is one – half the yield value which is 448 MPa. Calculate the forceon the shaftarrow_forward1. For a bolted assembly with six bolts, the stiffness of each bolt is k, = 3 Mlbf/in and the stiffness of the members is km = 12 Mlbf/in per bolt. An external load of 80 kips is applied to the entire joint. Assume the load is equally distributed to all the bolts. It has been determined to use 1/2 in-13 UNC grade 8 bolts with rolled threads. Assume a torque co-efficient of K = 0.2. a. Determine the maximum bolt preload that can be applied without exceeding the proof strength of the bolts. b. Determine the minimum bolt preload that can be applied while avoiding joint separation. c. Determine the value of torque in units of Ibf-ft that should be specified for preloading the bolts if it is desired to preload to 75% of the proof load. d. Determine the yielding factor of safety for part c). (based on proof strength)arrow_forward
- Problem 7: Analyse to determine the maximum service tensile live load force that can be supported by a pair of angles 2Ls 152x102x19, shown in the accompanying figure, if 4709M, Grade 345 steel and the AISC LRFD specifications are used. The live load is to be 3/2 times the dead load. The holes are drilled for 18mm rivets at standard gage distances.arrow_forward3. Find the power that can be safely transmitted by a flange type shaft coupling, if it has four equally spaced studs all at a radius of 50 mm from the shaft centre. The mean stud diameters are 12.5 mm, and each stud has a maximum safe working shear stress of 86 MPa. The shaft rotates at 3600 rpm.arrow_forwardsolve all 4 needarrow_forward
- Q(1) :A helical compression spring is to be cycled between 150 lbf and 300 lbf with a 1-in stroke.The number of cycles is low, so fatigue is not an issue. The coil must fit in a 2.1-in diameter hole with a 0.1-in clearance all the way around the spring. Use unpeened oil tempered wire with squared and ground ends. (CLO1) (i) Determine a suitable wire diameter, using a spring index of C=7.(ii) Determine a suitable mean coil diameter.(iii) Determine the necessary spring constant.(iv) Determine a suitable total number of coils.(v) Determine the necessary free length so that if the spring were compressed to its solid length, there would be no yielding.arrow_forwardRequired information For a bolted assembly with six bolts, the stiffness of each bolt is kb 2 Mibf/in and the stiffness of the members is km = 13 Mlbf/in per bolt. An external load of 80 kips is applied to the entire joint. Assume the load is equally distributed to all the bolts. It has been determined to use 1/2 in-13 UNC grade 8 bolts with rolled threads. It is desired to find the range of torque that a mechanic could apply to initially preload the bolts without expecting failure once the joint is loaded. Assume a torque coefficient of K = 0.2. NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Determine the maximum bolt preload that can be applied without exceeding the proof strength of the bolts once the load is applied. The maximum bolt preload that can be applied is Ibf.arrow_forwardUrgentarrow_forward
- show all stepsarrow_forwardA power screw having single start square threads of 25 mm nominal diameter and 5 mm pitch is acted upon by an axial load of 10 kN. The outer and inner diameters of screw collar are 50 mm and 20 mm respectively. The coefficient of thread friction and collar friction may be assumed as 0.2 and 0.15 respectively. The allowable thread bearing pressure is 5.8 N/mm², find: 1. The torque required to rotate the screw during raising and lowering the load. 2. The maximum shear stress in the screw. 3. The number of threads of nut in engagement with the screw.arrow_forwardQ/A rigid type flange coupling are connected two shafts made of plain carbon steel. The shafts are running at 500 rpm and transmit 25 kW power. Design the coupling completely for overload capacity 25 percent in excess of mean transmitted torque capacity. You can assume the following permissible stresses for the coupling components: 1. Shaft, permissible tensile stress -60 MPa, permissible shear stress - 35 MPa. 2. Keys, rectangular formed end sunk key having permissible compressive strength - 60 MPa. 3. Bolts, six numbers made of steel having permissible shear stress - 28 MPa. 4. Flanges cast iron having permissible shear stress - 12 MPa.arrow_forward
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