Subject: Machine Design -I

Topic: Machine Design consideration

Difficulty: High

Theories of failure

• Maximum principal stress theory (Rankine’s theory)
• Maximum shear stress theory (Coulomb, Tresca and Guest’s theory)
• Distortion energy theory (Huber von Mises and Hencky’s theory)
• Maximum strain theory (St. Venant’s theory)
• Maximum total strain energy theory (Haigh’s theory)

Maximum Principal Stress Theory (Rankine’s theory):

• The theory states that …