Table of Contents

Theories of failure - Strength of Material

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Theories of Failure and shapes - Strength Of Material


Maximum Principal Stress theory or Rankine theory

Maximum Principal stress theory or rankine theory
Maximum Principal stress theory or rankine theory


Maximum principal strain theory st. venant's theory
Maximum principal strain theory st. venant's theory
st. venant theory or max principal strain theory




Maximum shear stress theory
maximum shear stress theory


maximum strain energy theory
maximum strain energy theory


maximum strain energy theory 




maximum shear strain energy theory
maximum shear strain energy theory 


In short 

For brittle material


Theories of failure


Shape


Maximum Principal Stress theory 

(RANKINE’S THEORY)

Square


Maximum Principal Strain theory 

(St. VENANT’S THEORY)

Rhombus


Total Strain Energy theory 

(HAIGH’S THEORY)

Ellipse


For Ductile material


Theories of failure


Shape


Maximum Shear Stress Theory 

(GUEST AND TRESCA’S THEORY)

Hexagon


Maximum Distortion Energy Theory 

(VON MISES AND HENCKY’S THEORY)

Ellipse






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