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RESEARCH PRODUCT
Crack dynamics and crack surfaces in elastic beam lattices
Jussi TimonenJan ÅStrömMikko J. Alavasubject
PhysicsComputer simulationelastic two-dimensional lattices of beamsmedia_common.quotation_subjectPhysicsDynamics (mechanics)Crack tip opening displacementFracture mechanicsMechanicsdynamicsInertiaCrack growth resistance curveCrack closurepropagating cracksFracture toughnessmedia_commondescription
The dynamics of propagating cracks is analyzed in elastic two-dimensional lattices of beams. At early times, inertia effects and static stress enhancement combine so that the crack-tip velocity is found to behave as t1/7. At late times a minimal crack-tip model reproduces the numerical simulation results. With no disorder and for fast loading, a “mirror-mist-mirror” crack-surface pattern emerges. Introduction of disorder leads, however, to the formation of the “mirror-mist-hackle”–type interface typical in many experimental situations. Peer reviewed
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1998-02-01 |