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When analyzing two planes intersecting at right angles under the influence of shearing, tensile, and compressive stresses, it is essential to identify principal planes, maximum shearing stress, and principal stresses. To find the principal planes, apply a formula that equates them to twice the shearing stress divided by the difference between tensile and compressive stresses.

Equation 1

By inserting the given shearing, tensile, and compressive stress values into this formula, one can calculate the orientations of the principal planes. Then consider the average of the tensile and compressive stresses to determine the average normal stress. This step is important for understanding the overall stress distribution across the material. The maximum shearing stress is calculated using the derived normal and shearing stress values.

Equation 2

This calculation highlights the peak shearing stress the material experiences, which is vital for assessing its failure risk. The major principal stress, which indicates the maximum stress the material can withstand without yielding, is computed by adding the maximum shearing stress to the average normal stress. Similarly, the minimum principal stress is found by subtracting the maximum shearing stress from the average normal stress. These computations are fundamental for engineering applications, providing insights into material behavior under complex stress conditions.

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Principal StressesPrincipal PlanesMaximum Shearing StressTensile StressesCompressive StressesAverage Normal StressStress DistributionFailure RiskMajor Principal StressMinimum Principal StressEngineering ApplicationsMaterial BehaviorStress Analysis

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23.3 : Principal Stresses: Problem Solving

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23.1 : Transformation of Plane Stress

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23.2 : Principal Stresses

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23.4 : Mohr's Circle for Plane Stress

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23.5 : General State of Stress

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23.7 : Transformation of Plane Strain

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23.8 : Mohr's Circle for Plane Strain

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23.9 : Three-Dimensional Analysis of Strain

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23.10 : Measurements of Strain

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