A tubular steel column CD supports horizontal cantilever arm ABC, as shown. Column CD has an outside diameter of 9.05 in. and a wa thickness of 0.265 in. Determine the maximum compression stress at the base of column CD. 16 ft C 13 ft 700 lb B 10 ft 900 lb A
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- 10. The homogeneous bar ABC that weighs 5000 Ib is supported by a smooth pin at C and a cable that runs from A to B around the frictionless pulley at D. If the diameter of the cable is 0.80 inch, calculate its axial stress. Answer: o = 4.90 ksi 3 ft 5ft1. A solid square rod is cantilevered at one end. The rod is 0.8 m long and supports a completely reversing transverse load at the other end of 50 kN. The material is AISI 1060 hot-rolled steel (?? =370 MPa,?? =680 MPa ). Use a design factor of 2 and determine the dimensions of the square cross section for the following cases. Neglect any stress concentration. a. The rod must support this load for 100 cycles. b. The rod must support this load for 104 cycles. c. The rod must have infinite life.The bar shown is subjected to a moment of 6000 lb.in. Calculate the maximum stress developed in the bar. D. Given : D = 2 in, d = 1 in, h = 0.5 in ,r = 0.25 in Select one: a. Omax = 102.18 ksi O b. Omax = 147.07 ksi O c. Omax = 72.00 ksi O d. Omax = 126.06 ksi Clear my choice
- A column is fabricated by adhesively bonding two aluminum faceplates to a foam plastic core as shown below. Note that there are only left and right aluminum plates (with no front and back plates). The foam plastic core has a square cross-section with elastic modulus Ef 1110 MPa. Determine the stress in the aluminum plates, the stress in the foam core, and the displacement of the column under the action of the applied force. = Note: Express tensile stresses as positive (+) and compressive stresses as negative (-). Given: • L1 L2 = = 100 mm = 1.7 m • . L3 = = 1.4 mm RIGID PLATE ALUMINUM FACE PLATE F FOAM L2 |← 41 +| |—–—– 63 L1 L3 F = 37 kN σα = σ f = |ɗ| = = number (rtol=0.01, atol=1e-05) number (rtol=0.01, atol=1e-05) number (rtol=0.01, atol=1e-05) MPa ? MPa mm ?P. 25mm 500 mm Data Given Let steel tube denoted as 1 and brass rod denoted as 2 d10= 40mm E1 = 200GPA dii = 30mm E2 80 GPa d2 = 25mm A composite bar is made up of a brass rod of 25m diameter enclosed in a steel tube, being co-axial of 40mm external diameters and 30mm internal diameter as shown below. They are securely fixed at each end. If the stress in brass and steel are not to exceed 70MPA and 120 MPa respectively find the load (P) the composite bar can safely carry if the composite bar is 500mm long. Take E for steel Tube as 200 GPa and brass rod as 80 GPa respectively.An elevated jogging track is supported at intervals by a wood beam AB (L = 7.5 ft) that is pinned at A and supported by steel rod BC and a steel washer at B. Both the rod (dBC= 3/16 in.) and the washer (dB= 1.0 in.) were designed using a rod tension force of TBC=415 lb. The rod was sized using a factor of safely of 3 against reaching the ultimate stress tru— 60 ksi. An allowable bearing stress sba= 565 psi was used to size the washer at B. A small platform HF is suspended below a section of the elevated track to support some mechanical and electrical equipment. The equipment load is uniform load q = 50 lb/ft and concentrated load WE= 175 lb at mid-span of beam HF. The plan is to drill a hole through beam ABaX £land install the same rod (dBC) and washer) dB) at both D and F to support beam HF. (a) Use s and to check the proposed design for rod DF and washer d,: are they acceptable? (b) Re-check the normal tensile stress in rod BC and bearing stress at 8 if either is inadequate under the additional load from platform HF. Re-design them to meet the original design criteria.
- Solve Problem 11.3-3 for a W 10 × 45 steel column having a length L = 28 ft.A central horizontal section of a hook is a symmetrical trapezium of inner width=67.5mm and of outer width =22.5mm. The depth of the section is 90mm. The hookcarries a load of 37.5kN. The load line passes through the centre of curvature. Theradius of the hook is 52.5mm. Determine the maximum compressive and tensilestresses in the section of the hook.If a solid circular rod having an initial diameter D = 0.03 m and initial length L = 0.8 m, is subjected to a tensile force F = 300 kN, the new diameter will be: Given: The rod is made of steel having Young's modulus E = 200 Gpa and a Poisson's ratio = 0.3. Select one: a. Df= 2.993 mm Ob. Df = 10.92 mm Oc. Df= 3.007 mm Od. Df = 30.02 mm Oe. Df = 29.98 mm
- A reinforced concrete collumn 200mm in diameter is designed to carry an axial compressive load of 320kN. Determine the required cross sectional area of the reinforcing steel if the allowable stress are 6MPa for concrete and 120MPa foe steel. Use Eco=14GPa and Est=200GPa. -Draw and label the diagram correctly, No diagram in the solution will be marked wrong. -Shortcut solution will be marked wrong.- Direction of the assumption of the equilibrium equation must be shown, no direction will be marked wrong.A steel bar has a uniform cross sectional area of 300mm?. Calculate the stress at member AB. 1.6m 1.2m 1.8m 25KN SKN 1OKNPART 2 : COMPUTE THE AXIAL STRESSES IN ALL MEMBERS OF THE TRUSS SHOWN. USE 300 sq. mm AND 250 sq. mm FOR TENSILE AND COMPRESSIVE STRESSES RESPECTIVELY. 65KN D BKN. 38° SKN 2m AXIAL TENSION (T) AREA AXIAL STRESS NO. MEMBER FORCE (KN) COMPRESSION (C) (sq. mm) (MPa) 1. AB 2 AC BC 4 CE BE BD 7 DE DF EF 10 FG 11 EG 12 GH 13 FH