How Do You Calculate Shear Stress in a Circular Bar Under Axial Compression?

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Discussion Overview

The discussion centers on calculating shear stress in a circular bar subjected to axial compression. Participants explore the relationship between applied force, area, and stress, specifically focusing on how to derive shear stress in this context.

Discussion Character

  • Technical explanation
  • Homework-related
  • Debate/contested

Main Points Raised

  • One participant asks how to calculate maximum normal and shear stresses for a circular bar under axial compression, providing specific dimensions and load.
  • Another participant emphasizes that all stress is calculated as Force/Area and prompts the original poster to consider the correct force and area for shear stress calculations.
  • A participant questions the relevance of angles in the problem, suggesting that the situation does not involve any angular components.
  • There is a request for the original poster to clarify their understanding of shear stress to facilitate further assistance.

Areas of Agreement / Disagreement

Participants do not reach a consensus, as there are differing views on the relevance of angles in the calculation and the level of understanding of shear stress required to proceed.

Contextual Notes

Limitations include potential misunderstandings about the definitions of shear stress and the assumptions regarding the geometry of the bar and the applied forces.

Rieck2000
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Stress's for circular bar?
Calculate the maximum normal and shearing stresses

of a circular bar with diameter 0.05m and axial compression load of 150000 N ..

I know for stress = Force / Area, how do you solve for shear stress?
 
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Good evening Rieck and welcome to Physics Forums.

All stress is Force/Area, you just have to take the correct force and area.

Did you miss the lecture on shear stress?

Look at my diagram of your bar.

What is the stress on the area perpendicular to the applied force (area1)?
What is the stress parallel to the area perpendicular to the applied force?

What is the force applied to the area of section SS.

Can you resolve this applied force perpendicular and parallel to SS?

What is the area of SS

So what is the shear stress on SS?

If you can write down a formula for this shear in terms of P and the angle theta how do you find the maximum of an equation?
 

Attachments

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there is no angle involved in this problem.
 
We can't help you if you don't help us.

What do you know about shear stress?
 

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