In terms of the stress-at-a-point analysis, define what is principal stress?

Construction Materials, Methods and Techniques (MindTap Course List)
4th Edition
ISBN:9781305086272
Author:William P. Spence, Eva Kultermann
Publisher:William P. Spence, Eva Kultermann
Chapter3: Properties Of Materials
Section: Chapter Questions
Problem 4RQ: How does a tensile stress differ from a compressive stress?
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In terms of the stress-at-a-point analysis, define what is principal stress?

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- Principal stress is defined as the maximum and minimum normal stress which may act on a point in loaded body.

- The plane of principal stress carry zero shear stress.

- if σx and σy are normal stress on vertical and horizontal plane respectively and this plane is accompanied by

   shear stress τ, then principal stress are given by equation :

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