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Mechanics in Engineering ›› 2004, Vol. 26 ›› Issue (2): 0-0.doi: 10.6052/1000-0992-2003-087

• Education Study •    

BRITTLE MATERIAL DAMAGE AND MOHR'S THEORY

  

  • Received:2003-03-11 Revised:1900-01-01 Online:2004-04-10 Published:2004-04-10

Abstract: Under different stress states, the physical mechanisms of the process of fractures can be different. Traction facture occurs when brittle materials are subject to traction, and shearing fracture occurs when they are subject to pressure, which are two kinds of fracture patterns with different physical mechanisms. The Mohr's strength theory uses only one fracture condition, which is questionable. This problem is studied in combining with fracture damage tests of grey cast iron HT200 materials. The results indicate that Mohr's theory can not rationally predict the strength of material fractures in the state of complicated stresses.

Key words: Mohr's theory, fracture mechanism, traction fracture,