How do you Calculate shear stress?

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Discussion Overview

The discussion centers around calculating shear stress in a cantilevered beam, particularly in the context of a stub axle shaft. Participants explore various methods and considerations related to shear stress calculations, including theoretical approaches and practical tools.

Discussion Character

  • Technical explanation
  • Mathematical reasoning
  • Homework-related

Main Points Raised

  • One participant inquires about calculating shear stress in a cantilevered beam, assuming that the shear would be longitudinal along the shaft.
  • Another participant suggests differentiating the bending moment to obtain the shear stress.
  • A different viewpoint proposes using FEA tools, such as PROE, for analysis.
  • One participant advises measuring the area of contact between objects to apply in the shear stress equation, detailing how to calculate the area.
  • Another participant emphasizes the importance of understanding the relationship between bending moment and shear stress, recommending checking a textbook for clarification.

Areas of Agreement / Disagreement

Participants present multiple approaches and suggestions for calculating shear stress, indicating that there is no consensus on a single method or understanding of the relationship between bending moment and shear stress.

Contextual Notes

Some responses may depend on specific definitions or assumptions about the geometry and loading conditions of the beam, which are not fully clarified in the discussion.

WetFork
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So i have a stub axle shaft, I have determined maximum bending stress at several locations and the bending moments, my question is how do you calculate shear stress in a cantilevered beam?
I assumed the shear would be longitudinal along the shaft.
Thanks for any assistance given.
 
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Differentiate the bending moment to obtain the shear stress.
 
Maybe you can use some FEA tools, e.g.PROE
 
Measure the area of the side of the object that is in contact with the object applying force in meters. For example, if your objects are two boxes sliding past one another, measure the area of the side of the box. To find the area, measure the length and width of the side of the object with your ruler and then multiply these two values together.This will be your "A" in the shear stress equation.
 
Do you know the relation between bending moment and shear stress? If not, check your textbook. It is vitally important for you to know this.
 

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