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Which theory of failure will you use for aluminium components under steady loading? 

Which theory of failure will you use for aluminium components under steady loading?  Correct Answer Maximum shear stress theory 

Explanation:-

Maximum Shear Stress Theory ( MSST )

  • According to this theory, failure occurs when maximum shear stress at any point reaches the yield strength. 
  • Condition for safe design:

Important Points

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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