Can DOUBLE SHEAR occur in ANY direction?

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Discussion Overview

The discussion revolves around the concept of double shear in the context of forces acting on a pin, specifically whether double shear can occur in any direction based on the resultant forces applied. The scope includes theoretical considerations of shear stress and its physical interpretation in mechanics and strength of materials.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • One participant questions whether the resultant force from horizontal and vertical shear forces (Rbh and Rbv) indicates that the pin will shear in the direction of this resultant force rather than tangentially.
  • Another participant challenges the terminology of "shear tangentially" and suggests that the pin may shear horizontally due to the weight of the arms acting on it.
  • A participant inquires about the classification of bearing and shearing stresses as part of internal forces or loads.
  • Another participant proposes considering a material element in the pin to analyze the principal stress using the reaction loads on the pin.
  • One participant expresses a desire to understand the physical interpretation of bearing and shearing stresses, their importance, and when they should be calculated.

Areas of Agreement / Disagreement

Participants appear to have differing views on the direction of shear and the interpretation of shear stresses, indicating that multiple competing perspectives remain without a clear consensus.

Contextual Notes

There are unresolved aspects regarding the definitions of shear stress and the conditions under which different shear directions may apply, as well as the implications of the forces acting on the pin.

polka129
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i recently came across a problem which has raised a question in my mind...

heres the link to it

http://www.mathalino.com/reviewer/m...aterials/solution-to-problem-119-shear-stress


the Rbh force tries to shear it horizontally while the Rbv tries to shear it vertically.so here in the solution the resultant of these forces is taken.so does it mean that in reality(physcially) the pin will shear IN THE DIRECTION of this resultant force?not tangentially as in the case of horizontal or vertical?

thank you.
 
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What on Earth do you mean by shear tangentially?

Since the arms have weight the pin may well shear horizontally in reality.

However as noted both Rbh and Rbv act across the same areas and so, therefore does their resultant.
 
sir..are bearing and shearing stresses part of internal forces/loads?
 
Think of a material element in the pin and using the reaction load son the pin to find the principle stress.
 
yes but i want to know the physical intrepretation of these two stress..why are they important.when do we need to calculate them..
 

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