DME-III_Design of Machine Elements_Cotter Joint Numerical Problem

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Design procedure of cotter joint in tabular form 



Numerical Problems
1) Design and draw a detailed sketch of cotter joint which is required to withstand a load of 30 kN in tension and compression. The material used for the cotter joint has following allowable stress values

Allowable stress in tension =50 MPa,

Shear Stress =35 Mpa

Crushing stress= 90 Mpa
2) Design and draw cotter joint required to withstand a load of 45 kN, The cotter joint is made up of material having following allowable stresses

Allowable stress in tension =55 MPa

Allowable shear stress = 40 MPa

Allowable Crushing stress = 70 MPa
3) It is required to design a cotter joint which is used to connect two steel rods having same diameter. The maximum axial load on the joint is 50 kN. The material used for joint is 30C8 ,ultimate tensile stress for the material is 400 MPa. Using factor of safety 6. Design all dimensions of the joint. Take ultimate shear stress half that of ultimate tensile stress and Ultimate Crushing stress double that of ultimate tensile stress. Draw the neat dimensioned sketch of the joint designed showing all important dimensions.
4)  A cotter joint carries a load of 150 kN, is made up material 45C8. The ultimate tensile stress is 500 MPa. Using factor of safety of 4 design the joint.Take ultimate shear stress half that of ultimate tensile stress and Ultimate Crushing stress double that of ultimate tensile stress. Draw the neat dimensioned sketch of the joint designed showing all important dimensions.
5) Design and draw cotter joint required to withstand a load of 200 kN, The cotter joint is made up of material having following allowable stresses

Allowable stress in tension =65 MPa

Allowable shear stress = 45 MPa

Allowable Crushing stress = 125 MPa
6) Design and draw cotter joint required to withstand a load of 120 kN, The cotter joint is made up of material having following allowable stresses

Allowable stress in tension =95 MPa

Allowable shear stress = 65 MPa

Allowable Crushing stress = 186 MPa

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