theoretical question not sure where to start on this Solutio

theoretical question not sure where to start on this...

Solution

Although Maximum Principal Stress Theory can be applied to any material but basically it is suited for Brittle material.

Since the material is ductile thus it is weak in shear and hence the material is failing at an angle smaller than 45^o.

Maximum Principal Stress Theory states that the failure of a mechanical component occurs when the maximum principal stress reaches the yeild or ultimate strength.

Now failure of the material can only be judged with the amount of Load which is applied on the specimen with the help of load and its nature whether it is tensile or compressive determine the maximum Normal and Shear stress experienced by the specimen and compare it with the ultimate strength or yeild strength of the material which can be seen from design data book..

Since the specimen is failing in Shear hence its shear stress at a point is more than the maximum shear stress that can be applied hence by the use of Theory and Mohrs circle calulate the shear stress from the maximum and minimum principle stress and calculate the load that can be applied on the specimen.