Second Principal Stress in Theories of Failure Formulas

Second Principal Stress is the second one among the two or three principal stresses acting on a biaxial or triaxial stressed component. And is denoted by σ₂. Second Principal Stress is usually measured using the Newton per Square Millimeter for Stress. Note that the value of Second Principal Stress is always positive.

Theories of Failure formulas that make use of Second Principal Stress

fxStress due to Change in Volume with No DistortionGo

fxStrain Energy due to Change in Volume given Principal StressesGo

fxDistortion Strain EnergyGo

fxTensile Yield Strength by Distortion Energy TheoremGo

fxTensile Yield Strength by Distortion Energy Theorem Considering Factor of SafetyGo

fxTensile Yield Strength for Biaxial Stress by Distortion Energy Theorem Considering Factor of SafetyGo

FAQ

What is the Second Principal Stress?

Second Principal Stress is the second one among the two or three principal stresses acting on a biaxial or triaxial stressed component. Second Principal Stress is usually measured using the Newton per Square Millimeter for Stress. Note that the value of Second Principal Stress is always positive.

Can the Second Principal Stress be negative?

No, the Second Principal Stress, measured in Stress cannot be negative.

What unit is used to measure Second Principal Stress?

Second Principal Stress is usually measured using the Newton per Square Millimeter[N/mm²] for Stress. Pascal[N/mm²], Newton per Square Meter[N/mm²], Kilonewton per Square Meter[N/mm²] are the few other units in which Second Principal Stress can be measured.

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