![]() ![]() Shaft Design for Combined Bending and Torsion Load – By Equivalent Bending Moment and Torque Method:This article will discuss drive shaft design concepts and shaft design formulas for shafts subjected to combined bending and torsion loading. ![]() This article will discuss drive shaft design concepts and formulas by explaining a design problem for a shaft for a constant load. How to Design a Shaft for a Constant Load:The shaft is a basic mechanical component of many machines. Though this is a very simple example of calculations but if we follow this methodology for new concept design can initially decide the size and start modelling with that size then the analysis iterations also could be reduced significantly, and so the overall design time and cost. ![]() If we consider a steel with yield strength is 25 kg/mm2, then we can see that stress generated in the clip is substantially low, so we have the chance to further reduce the thickness of the clip. h - the depth of the section being analyzed.b - the width of the section being analyzed.Ix - the area moment of inertia about the neutral axis x.y - the perpendicular distance to the neutral axis.Calculating bending stress: The classic formula for determining the bending stress in a member is: The area moment of inertia for this section = (bd^3)/12ģ. So, the maximum bending moment M=750 kg-mm Let’s consider our case as a cantilever beam (though it is not a proper cantilever beam but for the initial analysis we are considering this as a cantilever beam).įrom the bending moment diagram we can easily point out the location of maximum bending moment and the value of the maximum bending moment is 750 kg-mm. Calculating maximum bending moment: In order to find out the section where the maximum bending stress occurs, we need to draw bending moment diagram.The following steps need to be followed for finding out the actual thickness needed for the bracket: For initial design we have started with 5 mm thick plate. In the picture above the bracket is subjected to a load of 10 kg at point ‘B’ and fixed by bolt at point ‘A’. Today I will talk about design of a simple “L” shaped bracket, one side of it is clamped and at the other side it is carrying some amount of load. ![]()
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