Abstract
Ductile crack propagation is modelled for deeply side-grooved double cantilever beam (DCB) and compact tension (CT) specimens using simple beam on elastoplastic foundations. The side grooves dominate the constraint at the crack tip so that the deformation within the fracture process zone is one of uniaxial strain. Under these conditions there is little change in constraint with crack growth and the specific essential fracture energy is constant. In DCB specimens there is self similar crack propagation, but there is a rising JR curve that is size dependant. In small CT specimens the crack growth is not self similar and the fracture work is not constant. Under these conditions even the initiation J is not necessarily equal to the specific essential energy.KeywordsCrack LengthDuctile FractureCompact TensionFracture Process ZoneDouble Cantilever BeamThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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