Solutions A member… Maximum principal stress theory is not suitable for securing the safe design of machine component made of ductile material as shear failure may take place. The Questions and Answers of The ratio of maximum shear stress to maximum normal stress at any point in a solid circular shaft isa)1b)1.5c)2d)1.67Correct answer is option 'A'. In normal and shear stress, the magnitude of the stress is maximum for surfaces that are perpendicular to a certain direction , and zero across any surfaces that are parallel to . There is only a shear stress. If the sense of the bending moment is such that its components M x and M y both produce tension in the positive xy quadrant, calculate the maximum direct stress in the purlin, stating clearly the point at which it acts. The radius of that circle is the maximum shear stress.

In order to calculate maximum surface stress, you must know the bending moment, the distance from the neutral axis to the outer surface where the maximum stress occurs and the moment of inertia.

Showing that the Shear Stress in the flanges varies from a maximum at the top web to zero at the outer tips. The best representative of these values is Mohr's circle. The value of the maximum shear stress is dependent on the values of normal stresses. Maximum principal stress theory may be suitable for securing the safe design of machine component made …

are solved by group of students and teacher of Mechanical Engineering, which is also the largest student community of Mechanical Engineering. There is no shear force at any point in the section.

Your doubt, however, is that "the shear force at this point is equal to $1.5V$". And having a maximum stress greater than the average stress is totally reasonable. That is not the case. The Tresca or maximum shear stress criterion states that a metal will yield when the maximum shear stress at any point reaches a maximum … The maximum stress occurs at the surface of the beam farthest from the neutral axis.

Can you explain this answer? is done on EduRev Study Group by Mechanical Engineering Students.

The ratio of maximum shear stress to maximum normal stress at any point would bea)1 : 1b)1 : 2c)2 : 1d)2 : 3Correct answer is option 'A'. value of shear stress corresponding to the yield point of the material”. The simplest formula is the ratio of Shear Force and the Area on which it is acting. In the case of a tubular shaft, bore diameter d, this becomes: (11.9b)τ = 16TD π(D4−d4) Pa. For steels, the shear yield stress is usually taken as equal to 0.75 × yield stress in tension [6].

It is also subjected to a shear stress of 400 MPa on the same planes. The Questions and Answers of A solid circular shaft is subjected to pure torsion. In Practice, however it will be found that most of the Shearing Force ( About 95%) is carried by the Web and the Shear Force in the flanges is negligible.

A bending moment of 3000 N m is applied to the purlin in a plane at an angle of 30° to the vertical y axis. Figure P.15.1 shows the section of an angle purlin.

This is called "maximum surface stress" and is typically represented by the sigma sign. As shear rate is under the limits, product defects and problems can be reduced. When the shear stress is zero only across surfaces that are perpendicular to one particular direction, the stress is called biaxial , and can be viewed as the sum of two normal or shear stresses. The maximum normal stress will be? To unlock this lesson you must be a Member.

According to the theory of maximum shear stress, “The failure of a material or component will occur when the maximum value of shear stress developed in the body exceeds the limiting value of shear stress i.e. That is the only viable comparison to be made, stress to stress.

Questions: A body is subjected to a tensile stress of 1200 MPa on one plane and another tensile stress of 600 MPa on a plane at right angles to the former. The maximum shear stress induced in a shaft, diameter D, by a torque T Nm is given by: (11.9a)τ = 16T πD3Pa. Can you explain this answer? The ratio of maximum shear stress to maximum normal stress at any point in a solid circular shaft is - 2875717 The ratio of maximum and average shear stresses on a rectangular section, is a) 1 b) 1.25 c) 1.5 d) 2.5