ASYMPTOTIC SOLUTIONS OF MODE I STEADY GROWTH CRACK IN MATERIALS UNDER CREEP CONDITIONS

(整期优先)网络出版时间:2015-05-15
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Anasymptoticanalysisismadeonproblemswithasteady-statecrackgrowthcoupledwithacreeplawmodelundertensileloads.Asymptoticequationsofcracktipfieldsincreepmaterialsarederivedandsolvednumericallyundersmallscaleconditions.Stressandstrainfunctionsareadoptedunderapolarcoordinatesystem.Thegoverningequationsofasymptoticfieldsareobtainedbyinsertingthestressfieldandstrainfieldintothemateriallaw.Thecrackgrowthrateratherthanfracturecriterionplaysanimportantroleinthecracktipfieldsofmaterialswithcreepbehavior.