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Mechanics in Engineering ›› 2004, Vol. 26 ›› Issue (3): 0-0.doi: 10.6052/1000-0992-2003-068

• Education Study •    

PLASTIC LOADBEARING CAPACITY ANALYSES OF THICK WALLED TUBE CONSIDERING THE EFFECT OF DIFFERENT STRENGTH IN TENSION AND COMPRESSION

  

  • Received:2003-03-03 Revised:2003-07-07 Online:2004-06-10 Published:2004-06-10

Abstract: In the paper, the limit load formulae for a thick-walled tube with different strength in tension and compression state are derived based on the twin shear unified strength theory, under the action of an inner pressure and axial force. In these formulae, the results with Tresca criterion, linear approximate Mises criterion and twin shear stress yield criterion can be obtained with different coefficient values reflecting the middle main stress effect, and limit loading curves for different yielding criterions are plotted. Therefore, accurate solutions for limit loads can be obtained with this theory under the three-dimensional state; the limit loading diagram is consistent to yielding curves of twin shear stress, Mises and Tresca criterions; these formulae can be used for the material with differentia strength in tension and compression state.

Key words: twin shear unified thength theory, thick-walled tube, yield criterion, limit load