滑开型断裂的复合型脆断判据
The Mixed Mode Brittle Fracture Criteria in Sliding Mode Fracture
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摘要: 众所周知,现有的复合型脆断判据都是张开型断裂判据.我们认为亦存在着滑开型断裂的复合型脆断,从而提出三个滑开型断裂的复合型脆断判据:径向剪应力判据、最大剪应力判据及歪形应变能密度判据.这样,我们就能全面解释带裂纹的构件的脆断现象.Abstract: It is well-known that the present mixed mode brittle fracture criteria are all the opening mode fracture criterion. We consider that mixed mode brittle fracture of sliding mode fracture exists too. Hence we propose three criteria of mixed mode brittle fracture of sliding mode fracture; the radial shearing stress criterion, the maximum shearing stress criterion and the distortional strain-energy-density criterion. Thus, we can overall explain the phenomena of brittle fracture in the structural elements with cracks.
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[1] Liebowitz,H.,J.Efits and D.L.Jones,Some recent theoretical and experimental developments in fracture mechanics,Fracture,ICF4,Waterloo,Canada,1(1977),695-723. [2] Chisholm,D.B.,D.SC.Dissertation,The George Washington University,Washington,D.C.(1975). [3] Sih,G.C.,“Strain-energy-density factor applied to mixed mode crack problems”,Int.Journ.of Fracture,10(1974),305. [4] 林拜松,复合型脆断的周向应力应变乘积判据,应用数学和力学,5, 6(1984), 849-854. -
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