Q6/ A helical square section spring is set inside another, the outer spring having a freelength of 35 mm greater than the inner spring. The dimensions of each spring are asfollows:Mean diameter (mm)Side of square section (mm)Active turnsOuterInnerSpringSpring12070872015Determine the (1) Maximum deflection of the two springs and (2) Equivalent springrate of the two springs after sufficient load has been applied to deflect the outerspring 60 mm. Use G = 83 GN/m².

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Answered: Q6/ A helical square section spring is…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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The material is a spring wire has a shear modulus of 1.2 x 107 lbf/in2. The maximum allowable stress under design conditions is 50,000 lbf/in2. The spring index is 7. Assume the maximum stress is experienced when a 700 lbm objects falls from a height of 46 in above the tip of the spring, impacts squarely on the spring, and deflects the spring 10 in. Determie: 1. The minimum wire diameter is most nearly A. 0.58 in B. 0.88 in C. 1.4 in D. 1.8 in 2. The mean coil diameter is most nearly A. 8.6 in B. 10 in C. 13 in D. 16 in 3. The number of active coils is most nearly A. 8 B. 11 C. 12 D. 14
1. Design a compression helical spring to carry a load of 500 N with a deflection of 25 mm. The spring index may be taken as 8. Assume the following values for the spring material: Permissible shear stress = 350 MPa Modulus of rigidity = 84 kN/mm2 4С - 1 0.615 Wahl's factor where C-spring index. 4С - 4
A helical compression spring is required for a mechanism under static loading with a maximum force of 1250N. The deflection caused by this load is 30mm the ends are squared and ground. The spring has an index of 6 and is made of cold drawn steel wire with tensile strength of 1090 N/mm and modulus of rigidity of 81370 N/mm2. The permissible shear strength is taken as 50% of the ultimate tensile strength. Design the spring and calculate: (a) The wire diameter (b) Mean coil diameter. (c) Number of active coils (d) Total number of coils (e) Free length of the spring (f) Pitch of the coil
A helical compression spring is used to absorb heavy vibrations. Apply mechanical engineering design theory and by using the values given in the table below, (i) Calculate the force applied on the spring. (ii) Determine the number of turns. (iii) Determine the spring stiffness. (iv) Calculate the free length. 5 maiks (v) Would you recommend to increase the number of turns and free length of the spring for this application ? Why? (answer in one/two sentences only). Spring data Туре Helical squared and ground ends Initial Compression of spring 30 mm 80 mm Further Compression of spring after applying heavy load Shear Stress Modulus of rigidity 750 N/mm2 82000 MPa Wire diameter 8 mm Spring Index
A spring is designed to fire a 2 kg projectile. The outside diameter of the coil is 160 mm with an 18mm wire and a total of 22 coils squared and ground. The spring has a free length of 650 mm. When set or loaded, the spring is compressed to a length of 450 mm. a. Determine the spring index, as well as the active number of coils b. Find the spring deflection and Wahl's factor.
Design a compression helical spring to carry a load of 500 N with a deflection of 25 mm. The spring index may be taken as 8. Assume the following values for the spring material: Permissible shear stress 350 MPa Modulus of rigidity = 84 kN/mm? 4С -1 0.615 Wahl's factor 4C – 4 where C= spring index. C [Ans. d= 5.893 mm; D= 47.144 mm;n=6| %3D
Three extension springs are hooked in series and supports a weight of 70 kg. One spring has a rate of 0.209 kg ∕mm and the other two have equal spring rate of 0.643 kg ∕mm. Find the deflection.
A semi-elliptical leaf spring fully graduated which is made of stee; has a thickness of 10 mm, number of leaves is 6, the distance between eye to eye is 950 mm, width of spring is 65 mm and the width of the band is 140 mm. use E = 200,000 MPa and working stress of spring material as 360 MPa. Determine the deflection of the spring. Select one: O a. 73.4 mm O b. 33.3 mm O c. 57.9 mm O d. 40.6 mm
A helical compression spring is subjected to a maximum force, Fmax of 1250 N. The deflection of the spring corresponding to the maximum force should be approximately 30 mm. The spring index is 6. The allowable shear stress is 350 MPa and the modulus of rigidity is 81 370 N/mm². Design the helical spring by calculating the wire diameter, mean coil diameter, number of active coils and the total number of coils. State all assumptions and decisions in your design.
PROBLEM: 5 A helical valve spring is to be designed for an operating load range of 90N to 195N. The maximum deflection of the spring for this load range is 7.5 mm. Assuming a spring index of 9, a permissible shear stress of 550 N/mm2 for the material and the modulus of rigidity of 0.85x105 N/mm2. Determine the dimensions of the spring. (i.e. Diameter of the spring wire ,Mean coil diameter, Outer diameter of the spring, number of active turn and free length of the spring). Assume the spring coil is squared and ground.
Two squared and ground springs arranged in series. Find the total deflection in mm. Upper strings have the the following specifications. Upper 14 actual coils of 35mm diameter, outside diameter of 225mm Lower 10 active coils 20 mm, outside diameter of 170 mm. The maximum states in either spring must not exceed 250GPa and 83GPa

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