(3) A machine part of uniform thickness t = b/2.5 is shaped as shown and machined all over from AISI C1020, as rolled. The design is for indefinite life for a load repeated from 1,750 lb to 3,500 lb. Let d = b. (a) For a design factor of 1.8 (Soderberg), what should be the dimensions of the part? (b)What is the maximum tensile stress in the part as designed?
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- Figure below shows a rotating shaft simply supported in ball bearings at A and D and loaded by a nonrotating orce Fof 6.8 kN. Using ASTM "minimum" strengths, estimate the life of the part. 6T td7 (a) Shaft drawing showing all dimensions in millimeters; all fillets 3-mm radius. The shaft rotates and the load is stationary; material is machined from AISI 1050 cold-drawn steel. (b) Bending moment diagram.Design of a Shaft subjected to Alternating Loads 1. [Proof of Concept] Considéra machined steel circular shaft subjected to maximum and minimum bending moment of 1000 and 4000 lb .in, respectively; and a maximum and minimum torque of 250 and 1600 Ib.in, respectively. Consider the factor of safety to be 2, the yield strength of the materials 40 ksi, and its ultimate strength to be 70ksi.Determine the minimum diameter of the shaft for the case where D is 20% larger than d, the fillet radius is 10% of d, and reliability is 99%. You may use DE-ASM E formula. 2. Write a computer code that can take Tm, Ta, Mm, Ma, choice of material, safety factor, and other necessary assumptions from the user and return an estimated diameter for the shaft.Choice of inputs is up to you. Note that many of the required quantities are themselves function of the shaft diameter. Your code should be submitted with a report.An eyebolt is lifting a block weighing 360 lbs. The eyebolt is of SAE 1040 material with Su = 67 ksi and Sy = 55 ksi what is the stress area (in inches square) of the bolt if it is under the unified coarse series thread?
- M P 1: Y A :s.google.com Q1 * Find the number of bolts M8 1 which made from SAE Grade 4 steel that should be used to provide a clamping force of 60 KN between two components of a machine. Also, specify the required tightening torque. (Hint: assume that cach bolt is limited to be stressed to 65% of its proof strength). 1 Add file Q2 * A flat plate with a central hole is subjected to an axial tensile force F of 9.8 KN, as shown in the figure below. Calculate the minimum thickness t of the plate. Given that the material of the plate can support maximum tensile stress of 75 N.mm, w = 10 cm and d = 3 cm. Thickness =t F 1 Add file Submit Clear form IIAISI 1020 Cold-drawn can be considered as SAE 1020 Cold drawn instead. It has a yield strength of 64ksi(441 MPa) & an ultimate strength of 75 ksi(517 MPa) with a percent elongation of 20. For the steady load. It will have a design factor of 2 and a design shear stress formula of (yield strength divided by 4). This is all the given info needed to solve it.For crank slider, L,=40mm; L,= 120mm; %3D Offset =-20mm and d=100mm and . Find the possible value of 0, and 0,
- Please solve ellaborately and include the untis in every step, show diagram and write your solutions clearly and readable if your solution is in written form. Your work will be appreaciated much. Thank You! Two shafts 30 in. apart, each carrying a four-step pulley, are to be connected by a crossbelt. The driving shaft is to turn 180 rpm while the driven shaft is to turn 50, 150, 250,and 600 rpm. The smallest step of the driver is 10 in. in diameter. Find (a) the diametersof all the steps, (b) angle of contact for each pair of pulleys, and (c) belt length.A punching press pierces 40 holes per minute in a plate using 10 kN-m of energy_per hole during each revolution. Each piercing takes 35 per cent of the time needed to make one revolution. The punch receives power through a gear reduction unit which in turn is fed by a motor driven belt pulley 770 mm diameter and turning at 250 r.p.m. Find the power of the electric motor if overall efficiency of the transmission unit is 88 per cent. Design a cast iron flywheel to be used with the punching machine for a coefficient of steadiness of 5, if the space considerations limit the maximum diameter to 1.3 m. Allowable shear stress in the shaft material = 50 MPa Allowable tensile stress for cast iron = 4 MPa Density of cast iron = 7200 kg/m3Problem 1: The pin in a Box-Pin coupling is acted upon by a force (F), that varies as random variable due to misalignment as (2, 0.08) kN. The load act at a distance (1) that varies as (25 ± 3) mm. The diameter of the pin (D) is 18 mm. The fillet radius at the pin shoulder is about 1.5 mm. The stress concentration factor due to fatique in bending is thus a random variable kb that could vary from 1.3 to 1.5. The pin is made of steel AISI 4340 with mean endurance strength in bending of 400 MPa, and a standard deviation of 25 MPa. Determine the pin diameter (d), if one pin in every 10000 may be permitted to fail. R1.6 O L Problem (1)
- 2- A chain drive using bush roller chain transmits 5500 W of power. The driving shaft on an electric motor runs at 1440 r.p.m. and velocity ratio is 4.6:1. The drive is required to operate continuously with periodic lubrication and driven machine is such that load can be regarded as fairly constant. Considering the center distance to be as minimum as possible, design the chain drive by calculating leading dimensions, number of teeth and length of the chain.2. Compute for the estimated actual endurance limit for a machined rectangular steel bar (ASTMA148-58 SAE 0105) 3.5 in high by 0.375 in thick, subjected to repeated and reversed bendingstress. A reliability of 99% is desired. Please give the FBD also every calculation, thank you(8) An axle (non-rotating) is to be machined from AISI 1144, OQT 1,000°F, to the proportions keyway в shown, with a fillet radius r = 0.2D; F varies 1.SD from 400 lb. to 1,200 lb.; the supports are to the left of B, not shown. Let N = 2 (Soderberg Line). 6" (a) At the fillet, compute D and the 30 maximum tensile stress. (b) Compute D at section B. (c) Specify suitable dimensions. Keeping the given proportions, would a smaller diameter be permissible if the fillet were shot-peened?