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Solves spring design problems.
2. A compression coil spring can deform 0.4 mm when subjected to...
QUESTION 1 A compression coil spring made of an alloy steel is having the following specifications:-...
QUESTION 1 A compression coil spring made of an alloy steel is having the following specifications:- Mean diameter of coil = 50 mm; Wire diameter = 5 mm; Number of active coils = 20; If the spring is subjected to an axial load of 164 N. Calculate the maximum shear stress (Neglect the curvature effect) to which the spring material is subjected. (units of MPa).
2. A h elical compression spring is made of 302 stainless steel wire. The outside coil...
2. A h elical compression spring is made of 302 stainless steel wire. The outside coil diameter of the spring 1S 33.2 mm. The wire diameter is 2.8 mm. The ends are plain and ground, and there are total of 8.5 turns. Determine the deflection of the spring when it is subjected to a compression force of 10 N. In this condition, will the stress generated in the spring be beyond the maximum allowable torsional stress? (30 points)
15. The free end of a torsional spring deflects through 90° when subjected to a torque...
15. 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.
15. 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...
Design a helical compression spring subjected to a varying axial force of 1000 N to 2000...
Design a helical compression spring subjected to a varying axial force of 1000 N to 2000 N, is made of circular steel wire. Over this force range, the deflection of spring should be approximately 5 mm. Consider spring index = 5, for the spring that has square and ground ends. The spring is made of patented and cold drawn steel wire of grade 1 with A and m = 1753 and 0.182 respectively. The permissible shear stress for the spring...
Two concentric springs have a solid length of 50 mm. When they are subjected to an...
Two concentric springs have a solid length of 50 mm. When they are subjected to an axial load of N the maximum deflection is found to be 40 mm The springs are made of the same material and wire diameter for both are same. The maximum issible shear stress is 160 MPa. Determine the load shared by each spring and the wire diameter it the inner spring diameter is 120 mm and the radial arance is 2.5 mm. Rigidity modulus...
A close-coiled helical spring has a mean coil diameter 120 mm. A load of 4 kN...
A close-coiled helical spring has a mean coil diameter 120 mm. A load of 4 kN causes a deflection of 50 mm and a maximum stress of 500 MPa. Calculate 4.1. a) The wire diameter b) The number of coils c) The energy absorbed when subjected to the maximum load d) The spring stiffness 4.2. By use of a clearly labelled neat sketch, show that the deflection in a close-coiled 12] where Wis ; where W is the axial load...
A solid shaft with 100-mm-diameter is made of cast iron and is subjected to the distributed...
A solid shaft with 100-mm-diameter is made
of cast iron and is subjected to the distributed and
concentrated loadings as shown in Figure 9. The shear modulus of
cast iron is 39GPa.
(A) Determine the angle of twist at the free end A of the shaft due
to these loadings. [9 marks]
(B) Determine the maximum shear stress in this shaft. [4
marks]
(C) Cast iron is a brittle material with an ultimate strength of
260MPa. Determine whether this
structure...
6. It is desired to design a valve spring ofLC. engine for the following details (a)...
6. It is desired to design a valve spring ofLC. engine for the following details (a) Spring load when valve is closed 80N (b) Spring load when valve is open =100 N (c) Space constraints for the fitment of spring are Inside guide bush diameter 24 mm Outside recess diameter 36 mm (d) Valve lift 5 mm (e) Spring steel has the following properties Maximum permissible shear stress 350 MPa Modulus of rigidity =84 kN/mm Find 1. Wire diameter, 2....
2. A helical compression spring is made from No. 8 steel wire and is to carry a 100 lb static load at a deflection of 1 inch. The outside coil diameter of the spring is 0.972 inches. The spring ends...
2. A helical compression spring is made from No. 8 steel wire and is to carry a 100 lb static load at a deflection of 1 inch. The outside coil diameter of the spring is 0.972 inches. The spring ends are squared. Assume the torsional yield strength of the wire is 80000 psi, and the shear modulus is 11.4 Mpsi, determine (a) The static load corresponding to the yield strength. (b) The deflection that would be caused by the load...
2, A helical compression spring is to be designed to carry a variable load. The load...
2, A helical compression spring is to be designed to carry a variable load. The load varies from a minimum of F,=4 lbf to a maximum of F, = /8 lbf. The corresponding spring length varies from a maximum of L, 2.5 in to a minimum of L, =1 in. The outside diameter of the spring is Do = 0.638 in; the material is hard-drawn wiree of diameter d = 0.080 in. The free length of the spring is L...
QUESTION 1 A compression coil spring made of an alloy steel is having the following specifications:- Mean diameter of coil = 50 mm; Wire diameter = 5 mm; Number of active coils = 20; If the spring is subjected to an axial load of 164 N. Calculate the maximum shear stress (Neglect the curvature effect) to which the spring material is subjected. (units of MPa).
2. A h elical compression spring is made of 302 stainless steel wire. The outside coil diameter of the spring 1S 33.2 mm. The wire diameter is 2.8 mm. The ends are plain and ground, and there are total of 8.5 turns. Determine the deflection of the spring when it is subjected to a compression force of 10 N. In this condition, will the stress generated in the spring be beyond the maximum allowable torsional stress? (30 points)
15. 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.
15. 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...
Two concentric springs have a solid length of 50 mm. When they are subjected to an axial load of N the maximum deflection is found to be 40 mm The springs are made of the same material and wire diameter for both are same. The maximum issible shear stress is 160 MPa. Determine the load shared by each spring and the wire diameter it the inner spring diameter is 120 mm and the radial arance is 2.5 mm. Rigidity modulus...
A close-coiled helical spring has a mean coil diameter 120 mm. A load of 4 kN causes a deflection of 50 mm and a maximum stress of 500 MPa. Calculate 4.1. a) The wire diameter b) The number of coils c) The energy absorbed when subjected to the maximum load d) The spring stiffness 4.2. By use of a clearly labelled neat sketch, show that the deflection in a close-coiled 12] where Wis ; where W is the axial load...
A solid shaft with 100-mm-diameter is made
of cast iron and is subjected to the distributed and
concentrated loadings as shown in Figure 9. The shear modulus of
cast iron is 39GPa.
(A) Determine the angle of twist at the free end A of the shaft due
to these loadings. [9 marks]
(B) Determine the maximum shear stress in this shaft. [4
marks]
(C) Cast iron is a brittle material with an ultimate strength of
260MPa. Determine whether this
structure...
6. It is desired to design a valve spring ofLC. engine for the following details (a) Spring load when valve is closed 80N (b) Spring load when valve is open =100 N (c) Space constraints for the fitment of spring are Inside guide bush diameter 24 mm Outside recess diameter 36 mm (d) Valve lift 5 mm (e) Spring steel has the following properties Maximum permissible shear stress 350 MPa Modulus of rigidity =84 kN/mm Find 1. Wire diameter, 2....
2. A helical compression spring is made from No. 8 steel wire and is to carry a 100 lb static load at a deflection of 1 inch. The outside coil diameter of the spring is 0.972 inches. The spring ends are squared. Assume the torsional yield strength of the wire is 80000 psi, and the shear modulus is 11.4 Mpsi, determine (a) The static load corresponding to the yield strength. (b) The deflection that would be caused by the load...
2, A helical compression spring is to be designed to carry a variable load. The load varies from a minimum of F,=4 lbf to a maximum of F, = /8 lbf. The corresponding spring length varies from a maximum of L, 2.5 in to a minimum of L, =1 in. The outside diameter of the spring is Do = 0.638 in; the material is hard-drawn wiree of diameter d = 0.080 in. The free length of the spring is L...
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