Applied Mathematics and Mechanics (English Edition) ›› 1984, Vol. 5 ›› Issue (2): 1209-1219.

• Articles • Previous Articles     Next Articles

FATIGUE CRACK PROPAGAION UNDER MIXED MODE LOADING

Cao Gui-xin, Ju Ding-yi   

  1. Department of Mechanical Engineering, East China Institute of Chemical Technology, Shanghai
  • Received:1983-04-15 Online:1984-03-18 Published:1984-03-18

Abstract: Mixed model fatigue crack propagation is analyzed in this paper, using a centre cracked plate geometry, loaded under un-iaxial cyclic tension. Based on maximum principal stress criterion, a modified Paris expression of fatigue crack growth rate is derived in terms of ΔK and crack angle βα for an inclined crack. It is also shown that it is more convenient to express the Paris equation by means of crack length projected on the x -axis, αx rather than the actual length, α itself. The crack trajectory due to cyclic loading is predicted, β is varied from 29° to 90°. Experimental data on Type L3 aluminium agree fairly well with predicted values when βα exceeds 30°.

Key words: laser, buckling, thermal shock

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