A helical compression spring is used to absorb heavy vibrations. Apply mechanicalengineering 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.(v) Would you recommend to increase the number of turns and free length of the springfor this application ? Why? (answer in one/two sentences only).Spring dataТурeHelical squared and groundendsInitial Compression of spring20 mmFurther Compression of spring after applyingheavy loadShear StressModulus of rigidity60 mm500 N/mm282000 MPaWire diameter10 mmSpring Index6.

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Mechanics of Materials (MindTap Course List)

9th Edition

ISBN:9781337093347

Author:Barry J. Goodno, James M. Gere

Publisher:Barry J. Goodno, James M. Gere

Chapter2: Axially Loaded Members

Section: Chapter Questions

Problem 2.5.31P

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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 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. (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 20 mm Further Compression of spring after applying heavy load Shear Stress Modulus of rigidity 60 mm 500 N/mm2 82000 MPa Wire diameter 10 mm 6. Spring Index
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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
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Stiffness of a helical spring decreases with increase in deflection Select one: O True O False
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The free end of a torsional spring deflects through 90° when subjected to a torque of 4 N-m. The spring index is 6. Determine the coil wire diameter and number of turns with the following data : Modulus of rigidity 80 GPa ; Modulus of elasticity = 200 GPa; Allowable stress = 500 MPa.
A helical spring made of oil hardened and tempered steel compression springs, made of circular wire, is subjected to an axial force, which varies from (2.5 KN) to (3.5 KN). Over this range of force, the deflection of the spring should be approximately (5 mm). The spring index can be taken as (5). The spring has square and ground ends. If ultimate tensile strength of (1050 N/mm2) and modulus of rigidity of (81370 N/mm2). The permissible shear stress for the spring wire should be taken as (50 %) of the ultimate tensile strength.Design the spring and calculate the following: 1. Wire diameter; 2. Mean coil diameter; 3. Number of active coils; 4. Total number of coils; 5. Solid length of the spring; 6. Free length of the spring: 7. pitch of coils (p); 8. Required spring rate; 9. Actual spring rate; and 10. Draw a neat sketch .of the spring showing various dimensions
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(27) A motor weighing 200 Ib is running at a constant speed of 1800 rpm. If the transmissibility of the force between the motor and the floor should be 0.1, what should be the spring constant for such mounting of the motor?