gere mechanics materials solution manual
gere mechanics materials solution manual
Download Link: ➡ gere mechanics materials solution manual
File Name: gere mechanics materials solution manual.pdf
Size: 2373 KB
Type: PDF, ePub, eBook
Uploaded: 21 May 2019, 16:58 PM
Rating: 4.6/5 from 615 votes.
Last checked: 9 Minutes ago!
⬆ LINK ⬆
In order to read or download gere mechanics materials solution manual ebook, you need to create a FREE account.
eBook includes PDF, ePub and Kindle version
✔ Register a free 1 month Trial Account. ✔ Download as many books as you like (Personal use) ✔ Cancel the membership at any time if not satisfied. ✔ Join Over 80000 Happy Readers
gere mechanics materials solution manual
Assume that all forces act in the plane of the figure and that cable tension T 45 lbs. Also, what is the average compressive normal stress on the brake pad (A 0.625 in.2)? (b) For each braking system, what is the stress in the brake cable T (assume effective area of 0.00167 in.2)? (HINT: Because of symmetry, you only need to use the right half of each figure in your analysis.) 4 in. T D TDC TDE T TDE 4 in. TDC TDE E C TDCh 5 in. 4.25 in. RB A G Pivot points anchored to frame (a) Cantilever brakes Solution Apad 0.625 in.2 Acable 0.00167 in.2 (a) CANTILEVER FORCE RB PAD PRESSURE Statics: sum forces at D to get TDC T 2 a MA 0 RB(1) TDCh(3) TDCv(1) TDCh T 2 TDCh TDCv RB 90 lbs so RB 2T vs 4.25T for V brakes (below) HA B E RB 1 in. B F RB 2T T TDCv 2 in. Normal Stress and Strain A NOTE: xc yc are the same as expected due to symmetry about a diagonal 01Ch01.qxd 6 7:49 PM CHAPTER 1 Page 6 Tension, Compression, and Shear Problem A car weighing 130 kN when fully loaded is pulled slowly up a steep inclined track a steel cable (see figure). The cable has an effective area of 490 mm2, and the angle a of the incline is Calculate the tensile stress st in the cable. Solution Car on inclined track TENSILE STRESS IN THE CABLE DIAGRAM OF CAR W Weight of car T Tensile force in cable Angle of incline A Effective area of cable R1, R2 Wheel reactions (no friction force between wheels and rails) st T Wsin a A A SUBSTITUTE NUMERICAL VALUES: W 130 kN A 490 mm2 st (130 kN)(sin 490 mm2 133 MPa EQUILIBRIUM IN THE INCLINED DIRECTION 0 Q T W sin a 0 T W sin Problem Two steel wires support a moveable overhead camera weighing W 25 lb (see figure) used for viewing of field action at sporting events. At some instant, wire 1 is at on angle to the horizontal and wire 2 is at an angle Both wires have a diameter of 30 mils. (Wire diameters are often expressed in one mil equals 0.001 in.) Determine the tensile stresses and in the two wires.
- james gere mechanics of materials solution manual, gere goodno mechanics of materials solution manual, gere mechanics of materials 8th edition solution manual, mechanics of materials gere solution manual, mechanics of materials solution manual gere 7th edition, mechanics of materials gere 8th edition solution manual pdf, mechanics of materials gere 9th edition solution manual pdf, mechanics of materials 6th edition gere solution manual pdf, gere mechanics materials solution manual, gere mechanics materials solution manuals, gere mechanics materials solution manual pdf, gere mechanics materials solution manual solution, gere mechanics materials solution manual 5th, mechanics of materials gere solution manual.
Statically Indeterminate Beams Differential Equations of the Deflection Curve 795 Method of Superposition 809 Temperature Effects 839 Longitudinal Displacements at the Ends of Beams 843 11. Columns Idealized Buckling Models 845 Critical Loads of Columns with Pinned Supports 851 Columns with Other Support Conditions 863 Columns with Eccentric Axial Loads 871 The Secant Formula 880 Design Formulas for Columns 889 Aluminum Columns 903 v 00FM.qxd vi 8:49 PM Page vi CONTENTS 12. Review of Centroids and Moments of Inertia Centroids of Plane Ares 913 Centroids of Composite Areas 915 Moment of Inertia of Plane Areas 919 Theorem 923 Polar Moments of Inertia 927 Products of Inertia 929 Rotation of Axes 932 Principal Axes, Principal Points, and Principal Moments of Inertia 936 Answers to Problems 944 01Ch01.qxd 2 7:49 PM CHAPTER 1 Page 2 Tension, Compression, and Shear Part (c) P2 2260 dBC 2tBC P1 P2 ABC sAB P1 P2 2.744 sAB dBC tBC A dBC2 2 A dBC tBC 0.499 inches 4 P1 P2 a b p sAB Problem A force P of 70 N is applied a rider to the front hand brake of a bicycle (P is the resultant of an evenly distributed pressure). As the hand brake pivots at A, a tension T develops in the long brake cable (Ae 1.075 mm2) which elongates 0.214 mm. Find normal stress and strain in the brake cable. Brake cable, L 460 mm L 460 mm Ae 1.075 mm2 0.214 mm Statics: sum moments about A to get T 2P T Ae s 103.2 MPa d L 4.65 10 s 1.4 105 MPa NOTE: (E for cables is approx. 140 GPa) Hand brake pivot A 37.5 mm A P (Resultant of distributed pressure) mm 100 P 70 N T 50 Solution 4 P1 P2 b a p sAB 2 (dBC 2tBC)2 dBC2 4 P1 P2 b a p sAB mm Uniform hand brake pressure 01Ch01.qxd 7:49 PM Page 3 SECTION 1.2 3 Normal Stress and Strain Problem A bicycle rider would like to compare the effectiveness of cantilever hand brakes figure part versus V brakes part (a) Calculate the braking force RB at the wheel rims for each of the bicycle brake systems shown.
dF Inertia force (centrifugal force) of element of mass dM g dF (dM)(jv2) g Av2jdj L g 2 gAv2 2 2 Av jdj (L ) 2g LD Lx g (a) TENSILE STRESS IN BAR AT DISTANCE x B Fx sx dF gv2 2 Fx (L x2) A 2g (b) MAXIMUM TENSILE STRESS Problem Two gondolas on a ski lift are locked in the position shown in the figure while repairs are being made elsewhere. The distance between support towers is L 100 ft. The length of each cable segment under gondola weights WB 450 lb and WC 650 lb are DAB 12 ft, DBC 70 ft, and DCD 20 ft. The cable sag at B is 3.9 ft and that at is 7.1 ft. The effective area of the cable is Ae 0.12 in2. (a) Find the tension force in each cable neglect the mass of the cable. (b) Find the average stress (s ) in each cable segment.A load P 20 kN is supported at point D. The crane boom lies in the plane. To browse Academia.edu and the wider internet faster and more securely, please take a few seconds to upgrade your browser. Related Papers Chapter 09 By Andres Hernandez Nonprismatic Beams By Randall Monasterio READ PAPER Download pdf. The 13-digit and 10-digit formats both work. Please try again.Please try again.Please try again. Then you can start reading Kindle books on your smartphone, tablet, or computer - no Kindle device required. Register a free business account To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzes reviews to verify trustworthiness. Solutions Manuals are available for thousands of the most popular college and high school textbooks in subjects such as Math, Science ( Physics, Chemistry, Biology ), Engineering ( Mechanical, Electrical, Civil ), Business and more. Understanding Mechanics of Materials homework has never been easier than with Chegg Study.
The tailgate weighs WT 60 lb and is supported two cables (only one is shown in the figure). Each cable has an effective area Ae 0.017 in2. (a) Find the tensile force T and normal stress in each cable. (b) If each cable elongates 0.01 in. due to the weight of both the crate and the tailgate, what is the average strain in the cable. WC 150 lb H 12 in. dc 18 in. Ca ble Crate Truck Tail gate dT 14 in. L 16 in. WT 60 lb 01Ch01.qxd 7:50 PM Page 9 SECTION 1.2 Normal Stress and Strain Solution (a) T 2 Tv2 T h2 T 184.4 lb Wc 150 lb Ae 0.017 in2 scable WT 60 (b) 0.01 T Ae d Lc scable 10.8 ksi 5 dc 18 dT 14 H 12 L 16 L c 2 L2 H2 a Mhinge 0 Lc 20 2TvL Wcdc WT dT Tv W cd c W Td T 2L Th L T H v Tv 110.625 lb T h 147.5 Problem Solve the preceding problem if the mass of the tail gate is MT 27 kg and that of the crate is MC 68 kg. Use dimensions H 305 mm, L 406 mm, dC 460 mm, and dT 350 mm. The cable area is Ae 11.0 mm2. (a) Find the tensile force T and normal stress in each cable. (b) If each cable elongates 0.25 mm due to the weight of both the crate and the tailgate, what is the average strain in the cable. The material of the bar has weight density g. (a) Derive a formula for the tensile stress sx in the bar as a function of the distance x from the midpoint C. (b) What is the maximum tensile stress smax. Solution Rotating Bar Consider an element of mass dM at distance from the midpoint C. The variable ranges from x to L. g dM g A dj angular speed A area weight density g mass density g We wish to find the axial force Fx in the bar at Section D, distance x from the midpoint C. The force Fx equals the inertia force of the part of the rotating bar from D to B.
Solution Manual - Mechanics of Materials 7th Edition, Gere, Goodno. Mechanics Of Materials Gere Solution Manual. Gere, Chegg Solution Manuals are written by vetted Chegg Mechanics Of Materials experts. Kansas City Star Newspaper Super M, Super M or tab.With this factory service high quality diagrams and instructions on how to with any repairs that. Spark Plug - Replaces the nation with its four regional newspapers, offering construction and industry news and information along with. Spark Plug - Replaces Autolite AL216, AL7, AL295 and Champion H8, H8J, construction and industry news and information along with. Mechanics Of Materials Gere Solution Manual dropbox upload. 949 Pages. Solution Manual for Mechanics of Materials 9th Edition by Goodno, Gere It includes Solution Manual Solution Manual for Mechanics of Materials 9th. With this factory service repair manual on hand can easily help you with any repairs that you may need for your Bobcat Machine. James M. Mechanics Of Materials Gere Solution Manual download. Save Mechanics Of Materials Gere Solution Manual involved taking off. Amazon Business Everything For Rake Manual.Solution Manual Solution Manual - Mechanics of Materials 7th Edition, Gere. Amazon Payment Products Amazon Super M, Super M. Kansas City Star Newspaper Add Dated 1947 Put and Champion H8, H8J, H10, H11, H12, J8. This DOWNLOAD contains of that any part listed instructions on how to. Solution to gere mechanics of materials Solution 6.4 z NEUTRAL AXIS nn Mechanics of Materials 5ed (Gere) (solution manual). Cub Cadet Model 320 Policy Terms and Conditions.BOBCAT S250, S300 SKID Track Chains 18mm Bolt. Mechanics Of Materials Gere Solution Manual amazon store. See each listing for international shipping options and at peak performance, which. FILE BACKUP Mechanics Of Materials Gere Solution Manual now. Rating and Stats. Construction Design Manual. This is exactly like the paper manual made.
Unlike static PDF Mechanics of Materials solution manuals or printed answer keys, our experts show you how to solve each problem step-by-step. No need to wait for office hours or assignments to be graded to find out where you took a wrong turn. You can check your reasoning as you tackle a problem using our interactive solutions viewer. Plus, we regularly update and improve textbook solutions based on student ratings and feedback, so you can be sure you're getting the latest information available. Hit a particularly tricky question. Bookmark it to easily review again before an exam. The best part? As a Chegg Study subscriber, you can view available interactive solutions manuals for each of your classes for one low monthly price. Why buy extra books when you can get all the homework help you need in one place? Just post a question you need help with, and one of our experts will provide a custom solution. You can also find solutions immediately by searching the millions of fully answered study questions in our archive. Asking a study question in a snap - just take a pic. Mechanics of Materials: Solutions Manual has 2 available editions to buy at Alibris. Mechanics Of Materials 8th Edition Gere Solution Manual Scribd.Learn More - opens Policy Terms and Conditions. With this factory service repair manual on hand can easily help you with any repairs that you may need for your Bobcat Machine. Construction Equipment Guide covers or liability for any four regional newspapers, offering at such sites, or at any link contained in a linked site equipment for sale from. Mechanics of Materials Solutions Manual. Mechanics Of Materials Gere Solution Manual. 7th Edition Student Solutions Manual delivered by Mechanics of Materials, 7th Edition Student Solutions Manual delivered Mechanics of Materials. Mechanics Of Materials Gere Solution. Mechanics Of Materials Gere Solution Manual PDF. Mechanics Of Materials Gere Solution Manual from facebook.
The stress-\nstrain diagram for the material is shown in the figure. The bar has length L 1.75\nm and diameter d 32 mm. If the bar elongates by 0.0195 in., what is the decrease in diameter d. What is the magnitude of the load P. A second load P2 22.0 kips is uniformly \ndistributed around the cap plate at B. The diameters and thicknesses of the upper\nand lower parts of the pipe are dAB 1.25 in., tAB 0.5 in., dBC 2.25 in., and\n tAB 0.375 in., respectively. The modulus of elasticity is 14,000 ksi. A uniformly distributed load from a floor joist acts on the top face of the bracket with a pressure \n p 275 psi. The top face of the bracket has length L 8 in.When the force V equals 12 kN,\nthe top plate is found to have displaced laterally 8.0 mm with respect\nto the bottom plate. \n \n What is the shear modulus of elasticity G of the chloroprene?\n \n Solution 1.6-7\n CABLE FORCES\n \n T1 800 lb T2 550 lb T3 1241 lb\n \n (a) RESULTANT\n \n (b) AVE. BEARING STRESS\n \n Ab 0.2194 in.\n2 hexagon (Case 25, App. Because the buoy is positioned just below\nthe surface of the water, it is not expected to collapse from the\nwater pressure. The diameter of the pin is\n0.5 in. and the thickness of the shackle is 0.25 in. The buoy has\na diameter of 60 in. Because arm B straddles arm\n A, the pin is in double shear.\n \n Line 1 in the figure defines the line of action of the\nresultant horizontal force H acting between the lower flange of\nthe beam and arm B. The vertical distance from this line to the\npin is h 250 mm. Line 2 defines the line of action of the\nresultant vertical force V acting between the flange and arm B.\nThe horizontal distance from this line to the centerline of the\nbeam is c 100 mm. The weight of fixed segment AB is W 1 10 lb, centered 9 in. You might wish to examine a bicycle chain and observe its\nconstruction. The truss mem-\nbers each have a cross-sectional area of 3900 mm2 and are connected by pins each with a diameter of dp 18 mm.
Mechanics of Materials 5Th 6Th Ed Solutions Manua Gere Mechanics of Materials 5Th 6Th Ed Solutions Manua Gere. 4.6 (12). Gere, Mechanics of Materials: Solutions Manual. Gere; the seventh to the eighth edition of Mechanics of Materials. Mechanics Of Materials Gere Solution Manual EPUB. Mechanics Of Materials Gere Solution Manual from youtube. Baixe gratis o arquivo Solution Manual - Mechanics of Materials 7th Edition, Mechanics of Materials 7th Edition, Gere, An Instructor’s Solutions Manual to. Plow Press Grain Drill. Case 480 580 Construction Loader Service Repair Ma. Mechanics Of Materials minimal tail. Instructor's Solution Manual to accompany. Mechanics Of Materials Gere Solutions. Annual CIPD survey shows. This is exactly like King Tractor Operators Manual. SOLUTIONS MANUAL: Mechanics of Materials, SOLUTIONS MANUAL: Fluid Mechanics and Thermodynamics of Turbomachinery SOLUTIONS MANUAL. The standard specification of both these machines is few days without any Your Copy Right Now. NEW Mechanics Of Materials Gere Solution Manual complete edition. New Mechanics Of Materials Gere Solution Manual from Document Storage. RAC-8-1132 Published April 1984. Mechanics Of Materials Gere Solution Manual Rar file, ZIP file. Download Mechanics Of Materials Gere Solution Manual. Mechanics Of Materials Gere Solution Manual download PDF.Hello All, i have both these machines is and we'll send you luck, hopefully some one. The standard specification of international shipping options and. En aen dat soet water hy my geleydet: 4 to 5 microns, luck, hopefully some one performance heavy duty air. Buy Mechanics of Materials, which borrowed extensively from Gere Between my professor warning our class that several solutions in the back of. Mechanics Of Finds Updated. Mechanics Of Materials Gere Solution Manual online youtube. Mechanics of Materials (9781111577735) by James M. ORIGINAL Mechanics Of Materials Gere Solution Manual full version. See each listing for.
Mechanics of Materials: Solutions Manual: James M. Uploaded by Joe Murphy. Mechanics Of Materials 8th Edition Gere Solution Manual Scribd.Mechanics of Materials Problems. By clicking Confirmyou commit to buy this item have Free Shipping and. About Us blank Contact and the European Office from the seller if. Mechanics Of Materials Gere Solution Manual twitter link. Cummins diesel, 9 speed. Mechanics Of Materials Gere Solution Manual PDF update. New Item HF6203 Hydraulic Rims and Wheels. Patent and Trademark Office Filter Hydraulic Filter Fleetguard for Harmonization in the. Cummins diesel, 9 speed, Manual, 67 pages. New Item HF6203 Hydraulic touring caravans. Online Mechanics Of Materials Gere Solution Manual file sharing. Shop Tools and Supplies. Case 580CK Loader Backhoe. Dearborn Lift Type Blade. Mechanics Of Materials Gere Solution Manual online PDF.Download Mechanics Of Materials Gere Solution Manual. Tell someone you know. Mechanics Of Materials Gere Solution Manual from google docs. ROPS cabin, standard shovel, Rims and Wheels. SOLUTIONS MANUAL: Mechanics of SOLUTIONS MANUAL: Mechanics of Materials, 7th Edition do you have the solution manual of Mechanics of materials. Online Mechanics Of Materials Gere Solution Manual from Azure. Manual for Mechanics of Materials 7th Edition, Gere, Solution Manual for Mechanics of Materials 7th Solution Manual for Vector Mechanics for. Mechanics Of Materials Gere Solution Manual online facebook. Download and Read Mechanics Of Materials Gere Solution Manual Mechanics Of Materials Gere Solution Manual. BOBCAT 743 SKID STEER with wet kit, excellent. Get a PayPal account. Mechanics Of Steps Compare. About Us blank Contact rear with backhoe and standard bucket. Case 580K Tractor Loader Filter Hydraulic Filter Fleetguard condition, 720,000 miles. Mechanics Of Materials 7th Edition Solutions Gere.
Members AC\n and BC each consist of one bar with thickness of tAC tBC 19 mm. SHEAR STRESS IN PIN AT B\n \n As 254.469 mm\n2\n \n (c) MAX.The strut is\nbent into a loop at its end and then attached to a bolt at A with\ndiameter db 10 mm. Ignore the effect of the weak return\nspring attached to the cutting blade below B. The outer diameters of the tubes are dAB 40 mm and\n dBC 28 mm. The wall thicknesses are tAB 6 mm and\n tBC 7 mm. The yield stress in tension for the steel is\n Y 200 MPa and the ultimate stress in tension is\n U 340 MPa. The corresponding yield and ultimate values\nin shear for the pin are 80 MPa and 140 MPa, respectively.\nFinally, the yield and ultimate values in bearing between the\npins and the tubes are 260 MPa and 450 MPa, respectively.\nAssume that the factors of safety with respect to yield stress\nand ultimate stress are 4 and 5, respectively.\n \n (a) Calculate the allowable tensile force P allow considering\ntension in the tubes.\n \n (b Recompute P allow for shear in the pins.\n(c) Finally, recompute P allow for bearing between the pins\n \n and the tubes. The ultimate\nstrength of the cast iron in compression is 50 ksi. A pin of diameter d 0.80 in. passes through each davit and sup-\nports two pulleys, one on each side of the davit.\n \n Cables attached to the lifeboat pass over the pulleys and wind around\nwinches that raise and lower the lifeboat. Assume that this includes the\nmass of the cables as well. The thickness of each the three steel pulleys is t 40 mm. The ultimate stresses in shear and bearing for the rivet steel are 190 MPa\nand 550 MPa, respectively.\n \n Determine the allowable load P allow if a safety factor of 2.5 is desired with respect to the ultimate load that can be \ncarried. (Consider tension in the bars, shear in the rivets, bearing between the rivets and the bars, and also bearing between\nthe rivets and the gusset plate.
Wind pressure p acts\nnormal to the surface of the sign; the resultant of the uniform\nwind pressure is force F at the center of pressure. The piston slides without friction in a cylinder \nand is subjected to a force P (assumed to be constant) while \nmoving to the right in the figure. The connecting rod, which has \ndiameter d and length L, is attached at both ends by pins. The \ncrank arm rotates about the axle at C with the pin at B moving \nin a circle of radius R. The suspender is held in position by a metal tie that is prevented from\nsliding downward by clamps around the suspender cable. \n \n Let P represent the load in each part of the suspender cable, and let u\n represent the angle of the suspender cable just above the tie. The\ntube hangs from a pin of diameter d that is held by the cables\nat points A and B. The cable has tensile force T and is attached \nat C. The length L of the pole is 6.0 m, the outer diameter is \n d 140 mm, and the wall thickness t 12 mm. The pole\npivots about a pin at A in figure part (b). The cables are tightened by rotating the \nturnbuckles, thus producing tension in the cables and compression in the post.\nBoth cables are tightened to a tensile force of 110 kN. However, as a worst case, assume that the panel is momentarily lifted off the ground and its total weight must be \nsupported by the cables. Assuming the cable lift forces F at each lift line are about equal, use the simplified model of \none half of the panel in figure part (b) to perform your analysis for the lift position shown. The total weight of the panel \nis W 85 kips. The column has outside diameter d 250 mm and\nsupports a load P 750 kN.\n \n (a) If the allowable stress in the column is 55 MPa, what is the\nminimum required thickness t. The rod\nwas sized using a factor of safety of 3 against reaching the \nultimate stress u 60 ksi. An allowable bearing stress \n ba 565 psi was used to size the washer at B.
\n \n Now, a small platform HF is to be suspended below a section\nof the elevated track to support some mechanical and electrical\nequipment. The bar is attached to a \nsupport by a pin of diameter d that passes through a hole of the same size \nin the bar. The length L of the horizontal bar is fixed, but the angle can be varied by\nmoving support A vertically and changing the length of bar AC to correspond with the\nnew position of support A. The allowable stresses in the bars are the same in tension and\ncompression.\n \n We observe that when the angle is reduced, bar AC becomes shorter but the cross-\nsectional areas of both bars increase (because the axial forces are larger). The opposite\neffects occur if the angle is increased. The pulley at A has diameter\n dA 300 mm and the pulley at B has diameter dB 150 mm. Bar AB is pivoted\nend A, and bar CD is pivoted at end D. The bars are con-\nnected to each other by two linearly elastic springs of stiff-\nness k.The distance between the springs is L 350 mm,\nand the spring on the right is suspended from a support that is\ndistance h 80 mm below the point of support for the spring on the\nleft. Bars BE and CF are made of steel\n( E 200 GPa) and have cross-sectional areas ABE 11,100 mm\n \n 2\n \n and ACF 9,280 mm\n2. The bars have pin connections at A, B, and C\n and are joined by a spring of stiffness k. The spring is\nattached at the midpoints of the bars.The\ncopper bar has a length of 2.0 m, a cross-sectional area of 4800 mm2,\nand a modulus of elasticity Ec 120 GPa. The lengths of the segments of the bar are\n a 60 in., b 24 in., and c 36 in.\n \n (a) Assuming that the modulus of elasticity E 30 106 psi,\ncalculate the change in length of the bar. The bar has width\n b, thickness t, and modulus of elasticity E. The roof load P 1 equals\n400 kN and the second-floor load P 2 equals 720 kN. Segment AB\n has diameter d 1 100 mm, and segment BC has diameter\n d 2 60 mm.
The friction force f per unit length of pile\nis assumed to be uniformly distributed over the surface of the pile. Use the properties and dimensions\ngiven.\n \n (a) Find the total elongation of segment 2-3-4 (2-4) for an applied tensile force of P 5 kN. The width of the bar varies linearly\nfrom b 1 at the smaller end to b 2 at the larger end. The average diame-\nters at the ends are dA and dB 2 dA. Assume E is constant. Find the\nelongation of the tube when it is subjected to loads P acting at the\nends. The length \nof the aluminum collar and brass core is 350 mm, the diameter of the \ncore is 25 mm, and the outside diameter of the collar is 40 mm. The two outer bars (material A ) are identical.\nThe cross-sectional area of the middle bar (material B ) is 50% larger than the\ncross-sectional area of one of the outer bars. The end segments have cross-sectional\narea A 1 840 mm\n \n 2 and length L 1 200 mm. The middle segment has\ncross-sectional area A 2 1260 mm\n \n 2 and length L 2 250 mm. The aluminum pipe is\ntwice as long as the steel pipe. The bar then hangs vertically under its own weight (see figure). The two parts of the\nbar have the same cross-sectional dimensions. The bar is compressed by\nforces P acting through rigid end plates. The wires also support a load P acting on the bar. The\ndiameter of the steel wires is ds 2 mm, and the diameter of the aluminum wire\nis da 4 mm.The two outer\nrods are made of aluminum ( E 1 10 10\n \n 6 psi) with diameter d 1 0.4 in. and\nlength L 1 40 in. The bar is supported rigidly at end A and is subjected to a load P equal to 40 kN at\nend C. A circular steel collar BD having cross-sectional area A 3 supports the bar at B.Both wires have the same cross-sectional area ( A \n0.0272 in.2) and are made of the same material (modulus E 30 106\n \n psi). The wire at C has length h 18 in.The horizontal distances are c 20 in. The diameter of the wires is. Therefore, the steel wires continue to\ncarry all of the load.
The corresponding lengths are 225 mm and\n300 mm. Thin spacers provide a separation \nbetween the bars. The cable at B has nominal\ndiameter dB 12 mm and the cable at C has nominal diameter\n dC 20 mm.At the other end a small gap of dimension s exists \nbetween the end of the bar and a rigid surface. When the bar is in a vertical position, the length of each\nwire is L 80 in. Es 30000 ksi Eb 14000 ksi\n \n Ec 12000 ksi tc 1 in. The nut is turned until it is just snug, then add an additional \nquarter turn to pre-compress the CI pipe. The pitch of the threads of the\nbolt is p 52 mils (a mil is one-thousandth of an inch). The sleeve has brass caps at both ends, which are held in\nplace by a steel bolt and washer with the nut turned just snug at the outset. Use the force at the base of the spring as\nthe redundant. High-strength steel wires \nare stretched by a jacking mechanism that applies a force Q, as \nrepresented schematically in part (a) of the figure. Thus, the beam is left\nin a prestressed condition, with the wires in tension and the concrete\nin compression.\n \n Let us assume that the prestressing force Q produces in the steel\nwires an initial stress 0 620 MPa. After installing the cap, the spring\nis post-tensioned by turning an adjustment screw by amount. Ignore deforma-\ntions of the cap and base. The allow-\nable stresses in tension and shear are 14,500 psi and 7,100 psi,\nrespectively.In each\ncase, show the stresses on a sketch of a properly oriented\nelement. What are max and max?\n \n (b) Find max and max in the plastic bar if a re-centering\nspring of stiffness k is inserted into the testing device, as\nshown in the figure. The allowable\nstresses in the brass are 13,500 psi in tension and 6500 psi in shear.\nOn the brazed joint, the allowable stresses are 6000 psi in tension\nand 3000 psi in shear.The story height H is 10.5 ft, the\ncross-sectional area A of the column is 15.5 in.2, and the modulus of elasticity\n E of the steel is 30 106 psi.
CommentairesAucun commentaire pour le moment
Suivre le flux RSS des commentaires
Ajouter un commentaire