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EXACT SOLUTIONS OF NEAR CRACK LINE FIELDS FOR MODE I CRACK UNDER PLANE STRESS CONDITION IN AN ELASTIC-PERFECTLY PLASTIC SOLID 总被引:1,自引:1,他引:1
EXACTSOLUTIONSOFNEARCRACKLINEFIELDSFORMODEICRACKUNDERPLANESTRESSCONDITIONINANELASTIC-PERFECTLYPLASTICSOLIDEXACTSOLUTIONSOFNEA... 相似文献
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The fatigue failure of a thin infinite center-cracked plate under completely reversed uniaxial loading is considered. A two-stage
fatigue crack model including the incubation and crack propagation stages is constructed. The stress distribution in the vicinity
of the crack tip is described using the concept of a conventional elastic crack. The crack-tip plastic zone is simulated by
a Dugdale thin plastic zone, and the condition for the movement of the failure front is given by criteria of damage mechanics.
It is shown that the fatigue crack growth rate in perfectly plastic materials with a plastic zone of constant length is a
power-law function of the stress intensity factor range. This relationship is quadratic when the length of the plastic zone
is not constant
Published in Prikladnaya Mekhanika, Vol. 41, No. 12, pp. 116–127, December 2005. 相似文献