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mechanical engineering

Questions and Answers of Mechanical Engineering

Repeat the requirements for the problem specified in the table if the bolts and nuts are replaced with cap screws that are threaded into tapped holes in the cast-iron cylinder.Problem 8-35, the
Repeat the requirements for the problem specified in the table if the bolts and nuts are replaced with cap screws that are threaded into tapped holes in the cast-iron cylinder.Problem 8-36, the
For the pressure vessel defined in the problem specified in the table, redesign the bolt specifications to satisfy all of the following requirements.€¢ Use coarse-thread bolts selecting a
For the pressure vessel defined in the problem specified in the table, redesign the bolt specifications to satisfy all of the following requirements.€¢ Use coarse-thread bolts selecting a
For the pressure vessel defined in the problem specified in the table, redesign the bolt specifications to satisfy all of the following requirements.€¢ Use coarse-thread bolts selecting a
For the pressure vessel defined in the problem specified in the table, redesign the bolt specifications to satisfy all of the following requirements.€¢ Use coarse-thread bolts selecting a
The figure shows a cast-iron bearing block that is to be bolted to a steel ceiling joist and is to support a gravity load of 18kN. Bolts used are M24 ISO 8.8 with coarse threads and with 4.6-mm-thick
For the bolted assembly in Prob. 8–29, assume the external load is a repeated load. Determine the fatigue factor of safety for the bolts using the following failure criteria:(a) Goodman.(b)
For a bolted assembly with eight bolts, the stiffness of each bolt is kb = 1.0 MN/mm and the stiffness of the members is km = 2.6 MN/mm per bolt. The bolts are preloaded to 75 percent of proof
For the bolted assembly in Prob. 8–32, assume 10 bolts are used. Determine the fatigue factor of safety using the Goodman criterion.In Prob. 8–32, For a bolted assembly, the stiffness of each
For the pressure cylinder defined in the problem specified in the table, the gas pressure is cycled between zero and pg. Determine the fatigue factor of safety for the bolts using the following
For the pressure cylinder defined in the problem specified in the table, the gas pressure is cycled between zero and pg. Determine the fatigue factor of safety for the bolts using the following
For the pressure cylinder defined in the problem specified in the table, the gas pressure is cycled between zero and pg. Determine the fatigue factor of safety for the bolts using the following
For the pressure cylinder defined in the problem specified in the table, the gas pressure is cycled between zero and pg. Determine the fatigue factor of safety for the bolts using the following
For the pressure cylinder defined in the problem specified in the table, the gas pressure is cycled between pg and pg/2. Determine the fatigue factor of safety for the bolts using the Goodman
For the pressure cylinder defined in the problem specified in the table, the gas pressure is cycled between pg and pg/2. Determine the fatigue factor of safety for the bolts using the Goodman
For the pressure cylinder defined in the problem specified in the table, the gas pressure is cycled between pg and pg/2. Determine the fatigue factor of safety for the bolts using the Goodman
For the pressure cylinder defined in the problem specified in the table, the gas pressure is cycled between pg and pg/2. Determine the fatigue factor of safety for the bolts using the Goodman
Suppose the welded steel bracket shown in the figure is bolted underneath a structural-steel ceiling beam to support a fluctuating vertical load imposed on it by a pin and yoke. The bolts are 1/2 -in
An M30 × 3.5 ISO 8.8 bolt is used in a joint at recommended preload, and the joint is subject to a repeated tensile fatigue load of P = 65 kN per bolt. The joint constant is C = 0.28. Find the
Using the Goodman fatigue criterion, repeat Problem 8â€“64 with the working pressure cycling between 1200 psi and 2000 psi?Problem 8-64, The figure shows a fluid-pressure linear actuator
The figure shows a bolted lap joint that uses SAE grade 5 bolts. The members are made of cold-drawn AISI 1020 steel. Find the safe tensile shear load F that can be applied to this connection to
The bolted connection shown in the figure uses SAE grade 8 bolts. The members are hot-rolled AISI 1040 steel. A tensile shear load F = 5000 lbf is applied to the connection.Find the factor of safety
A bolted lap joint using ISO class 5.8 bolts and members made of cold-drawn SAE 1040 steel is shown in the figure. Find the tensile shear load F that can be applied to this connection to provide a
The bolted connection shown in the figure is subjected to a tensile shear load of 90kN. The bolts are ISO class 5.8 and the material is cold-drawn AISI 1015 steel. Find the factor of safety of the
The figure shows a connection that employs three SAE grade 4 bolts. The tensile shear load on the joint is 5000 lbf. The members are cold-drawn bars of AISI 1020 steel.Find the factor of safety for
A beam is made up by bolting together two cold-drawn bars of AISI 1018 steel as a lap joint, as shown in the figure. The bolts used are ISO 5.8. Ignoring any twisting, determine the factor of safety
A vertical channel 152 Ã— 76 (see Table A€“7) has a cantilever beam bolted to it as shown. The channel is hot-rolled AISI 1006 steel. The bar is of hot-rolled AISI 1015 steel.
The cantilever bracket is bolted to a column with three M12 Ã— 1.75 ISO 5.8 bolts. The bracket is made from AISI 1020 hot-rolled steel. Find the factors of safety for the following
A 3/8 €“ Ã— 2-in AISI 1018 cold-drawn steel bar is cantilevered to support a static load of 250 lbf as illustrated. The bar is secured to the support using two 3/8 in-16 UNC SAE
The figure shows a welded fitting which has been tentatively designed to be bolted to a channel so as to transfer the 2000-lbf load into the channel. The channel and the two fitting plates are of
The figure shows a horizontal steel bar of thickness h loaded in steady tension and welded to a vertical support. Find the load F that will cause an allowable shear stress, Ï„allow, in the
The figure shows a horizontal steel bar of thickness h loaded in steady tension and welded to a vertical support. Find the load F that will cause an allowable shear stress, Ï„allow, in the
The figure shows a horizontal steel bar of thickness h loaded in steady tension and welded to a vertical support. Find the load F that will cause an allowable shear stress, Ï„allow, in the
The figure shows a horizontal steel bar of thickness h loaded in steady tension and welded to a vertical support. Find the load F that will cause an allowable shear stress, Ï„allow, in the
For the weldments of Prob. 9€“1, the electrodes are specified in the table. For the electrode metal indicated, what is the allowable load on the weldment?Problem 9-1, The figure shows a
For the weldments of Prob. 9€“2, the electrodes are specified in the table. For the electrode metal indicated, what is the allowable load on the weldment?Problem 9-2, The figure shows a
For the weldments of Prob. 9€“3, the electrodes are specified in the table. For the electrode metal indicated, what is the allowable load on the weldment?Problem 9-3, The figure shows a
For the weldments of Prob. 9€“4, the electrodes are specified in the table. For the electrode metal indicated, what is the allowable load on the weldment?Prob. 9€“4, The figure
The materials for the members being joined in Probs. 9â€“1 are specified below. What load on the weldment is allowable because member metal is incorporated in the welds?Problem 9-1, The figure
The materials for the members being joined in Problem. 9€“2 are specified below. What load on the weldment is allowable because member metal is incorporated in the welds?In Problem.
The materials for the members being joined in Problem. 9€“3 are specified below. What load on the weldment is allowable because member metal is incorporated in the welds?Problem 9-3, The
The materials for the members being joined in Problem. 9€“4 are specified below. What load on the weldment is allowable because member metal is incorporated in the welds?Problem 9-4, The
A steel bar of thickness h is welded to a vertical support as shown in the figure. What is the shear stress in the throat of the welds due to the forceF?
A steel bar of thickness h is welded to a vertical support as shown in the figure. What is the shear stress in the throat of the welds due to the forceF?
A steel bar of thickness h is welded to a vertical support as shown in the figure. What is the shear stress in the throat of the welds due to the forceF?
A steel bar of thickness h is welded to a vertical support as shown in the figure. What is the shear stress in the throat of the welds due to the forceF?
A steel bar of thickness h, to be used as a beam, is welded to a vertical support by two fillet welds as shown in the figure.(a) Find the safe bending force F if the allowable shear stress in the
A steel bar of thickness h, to be used as a beam, is welded to a vertical support by two fillet welds as shown in the figure.(a) Find the safe bending force F if the allowable shear stress in the
A steel bar of thickness h, to be used as a beam, is welded to a vertical support by two fillet welds as shown in the figure.(a) Find the safe bending force F if the allowable shear stress in the
A steel bar of thickness h, to be used as a beam, is welded to a vertical support by two fillet welds as shown in the figure.(a) Find the safe bending force F if the allowable shear stress in the
The figure shows a weldment just like that for Probs. 9€“17 to 9€“20 except there are four welds instead of two. Find the safe bending force F if the allowable shear stress in the
The figure shows a weldment just like that for Probs. 9€“17 to 9€“20 except there are four welds instead of two. Find the safe bending force F if the allowable shear stress in the
The figure shows a weldment just like that for Probs. 9€“17 to 9€“20 except there are four welds instead of two. Find the safe bending force F if the allowable shear stress in the
The figure shows a weldment just like that for Probs. 9€“17 to 9€“20 except there are four welds instead of two. Find the safe bending force F if the allowable shear stress in the
The weldment shown in the figure is subjected to an alternating force F. The hot-rolled steel bar has a thickness h and is of AISI 1010 steel. The vertical support is likewise AISI 1010 HR steel. The
The weldment shown in the figure is subjected to an alternating force F. The hot-rolled steel bar has a thickness h and is of AISI 1010 steel. The vertical support is likewise AISI 1010 HR steel. The
The weldment shown in the figure is subjected to an alternating force F. The hot-rolled steel bar has a thickness h and is of AISI 1010 steel. The vertical support is likewise AISI 1010 HR steel. The
The weldment shown in the figure is subjected to an alternating force F. The hot-rolled steel bar has a thickness h and is of AISI 1010 steel. The vertical support is likewise AISI 1010 HR steel. The
The permissible shear stress for the weldment illustrated is 20 kpsi. Estimate the load, F that will cause this stress in the weldmentthroat.
A steel bar of thickness h is subjected to a bending force F. The vertical support is stepped such that the horizontal welds are b1 and b2 long. Determine F if the maximum allowable shear stress
A steel bar of thickness h is subjected to a bending force F. The vertical support is stepped such that the horizontal welds are b1 and b2 long. Determine F if the maximum allowable shear stress
The attachment shown in the figure is made of 1018 HR steel 12 mm thick. The static force is 100 kN. The member is 75 mm wide. Specify the weldment (give the pattern, electrode number, type of weld,
The attachment shown carries a static bending load of 12 kN. The attachment length, l1, is 225 mm. Specify the weldment (give the pattern, electrode number, type of weld, length of weld, and legsize).
The attachment in Prob. 9â€“35 has not had its length determined. The static force is 12 kN. Specify the weldment (give the pattern, electrode number, type of weld, length of bead, and leg
A vertical column of 1018 hot-rolled steel is 10 in wide. An attachment has been designed to the point shown in the figure. The static load of 20 kip is applied, and the clearance a of 6.25 in has to
Fillet welds in joints resisting bending are interesting in that they can be simpler than those resisting torsion. From Prob. 9–33 you learned that your objective is to place weld metal as far away
When comparing two different weldment patterns it is useful to observe the resistance to bending or torsion and the volume of weld metal deposited. Measure of effectiveness, defined as second moment
A 2-in dia. steel bar is subjected to the loading indicated. Locate and estimate the maximum shear stress in the weld throat.F T____0 ...... 15 kip ·in
A 2-in dia. steel bar is subjected to the loading indicated. Locate and estimate the maximum shear stress in the weld throat.F T____2 ...... kips0
A 2-in dia. steel bar is subjected to the loading indicated. Locate and estimate the maximum shear stress in the weld throat.F T____ 2 ...... kips 15 kip ·in
For Prob. 9â€“45, determine the weld size if the maximum allowable shear stress is 20 kpsi.Prob. 9â€“45, A 2-in dia. steel bar is subjected to the loading indicated. Locate and estimate the
Find the maximum shear stress in the throat of the weld metal in thefigure.
The figure shows a welded steel bracket loaded by a static force F. Estimate the factor of safety if the allowable shear stress in the weld throat is 18kpsi.
The figure shows a formed sheet-steel bracket. Instead of securing it to the support with machine screws, welding has been proposed. If the combined shear stress in the weld metal is limited to 1.5
Estimate the safe static load F for the weldment shown in the figure if an E6010 electrode is used and the design factor is to be 2. The steel members are 1015 hot-rolled steel. Use
For a balanced double-lap joint cured at room temperature, Volkersen’s equation simplifies toτ(x) = Pω cosh(ωx)/4b sinh(ωl/2) = A1 cosh(ωx)(a) Show that the average stress τ is P/(2bl).(b)
Within the range of recommended values of the spring index, C, determine the maximum and minimum percentage difference between the Bergsträsser factor, KB, and the Wahl factor, KW.
A helical compression spring is wound using 2.5-mm-diameter music wire. The spring has an outside diameter of 31 mm with plain ground ends, and 14 total coils.(a) What should the free length be to
The spring in Prob. 10–3 is to be used with a static load of 130 N. Perform a design assessment represented by Eqs. (10–13) and (10–18) through (10–21) if the spring is closed to solid
A helical compression spring is made with oil-tempered wire with wire diameter of 0.2 in, mean coil diameter of 2 in, a total of 12 coils, a free length of 5 in, with squared ends.(a) Find the solid
A helical compression spring is to be made of oil-tempered wire of 4-mm diameter with a spring index of C = 10. The spring is to operate inside a hole, so buckling is not a problem and the ends can
A helical compression spring is made of hard-drawn spring steel wire 0.080-in in diameter and has an outside diameter of 0.880 in. The ends are plain and ground, and there are 8 total coils. (a) The
The spring of Prob. 10–7 is to be used with a static load of 16.5 lbf. Perform a design assessment represented by Eqs. (10–13) and (10–18) through (10–21) if the spring closed to solid
Listed in the tables are six springs described in customary units and five springs described in SI units. Investigate these squared-and-ground-ended helical compression springs to see if they are
Listed in the tables are six springs described in customary units and five springs described in SI units. Investigate these squared-and-ground-ended helical compression springs to see if they are
Listed in the tables are six springs described in customary units and five springs described in SI units. Investigate these squared-and-ground-ended helical compression springs to see if they are
Listed in the tables are six springs described in customary units and five springs described in SI units. Investigate these squared-and-ground-ended helical compression springs to see if they are
Listed in the tables are six springs described in customary units and five springs described in SI units. Investigate these squared-and-ground-ended helical compression springs to see if they are
Listed in the tables are six springs described in customary units and five springs described in SI units. Investigate these squared-and-ground-ended helical compression springs to see if they are
Listed in the tables are six springs described in customary units and five springs described in SI units. Investigate these squared-and-ground-ended helical compression springs to see if they are
Listed in the tables are six springs described in customary units and five springs described in SI units. Investigate these squared-and-ground-ended helical compression springs to see if they are
Listed in the tables are six springs described in customary units and five springs described in SI units. Investigate these squared-and-ground-ended helical compression springs to see if they are
Listed in the tables are six springs described in customary units and five springs described in SI units. Investigate these squared-and-ground-ended helical compression springs to see if they are
Listed in the tables are six springs described in customary units and five springs described in SI units. Investigate these squared-and-ground-ended helical compression springs to see if they are
Consider the steel spring in the illustration.(a) Find the pitch, solid height, and number of active turns.(b) Find the spring rate. Assume the material is A227 HD steel.(c) Find the force Fs
Solve Prob. 10–21 by iterating with an initial value of C = 10. If you have already solvedProb. 10–21, compares the steps and the results.Solve Prob. 10–21, A static service music wire helical
A holding fixture for a workpiece 37.5 mm thick at the clamp locations is being designed. The detail of one of the clamps is shown in the figure. A spring is required to drive the clamp upward when
Solve Prob. 10€“23 by iterating with an initial value of C = 8. If you have already solvedProb. 10€“23, compare the steps and the results.Prob. 10€“23, A holding fixture
A compression spring is needed to fit over a 0.5-in diameter rod. To allow for some clearance, the inside diameter of the spring is to be 0.6 in. To ensure a reasonable coil, use a spring index of

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