Numerical analysis of dynamic debonding under 2D in-plane and 3D loading

Breitenfeld, Michael; Geubelle, Philippe H.

doi:10.1007/978-94-017-2854-6_2

Cited by 34 publications

(59 citation statements)

References 13 publications

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“…[15][16][17][18][19][20][21] Cracking along dissimilar material interfaces is similarly complex, with the opening part of the fracture preceded by a zone of sliding contact at the rupture tip, and with intersonic rupture propagation speeds. Such features, seen in experiments, are also reproduced in theoretical calculations [22][23][24].…”

Section: K Ranjith and Jr Rice Division Of Engineering And Appliedsupporting

confidence: 62%

Workshops on Models of Fracture

Willis¹

1999

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Section: K Ranjith and Jr Rice Division Of Engineering And Appliedsupporting

confidence: 62%

Workshops on Models of Fracture

Willis¹

1999

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“…The spectral approach results in replicates of the growing rupture spaced every L x , which we take to be large enough that they do not interfere with one another. As suggested by Breitenfeld and Geubelle [1998], the timestep is taken to be 0.4(Dx/C S 2 ). Memory limitations restrict most runs to be carried out with n x = 2 14 on 16 processors; with L x = 1024 -2048 m this results in D x = 6.25-12.5 cm.…”

Section: Initial Conditions and Numerical Methodsmentioning

confidence: 99%

Aftershock asymmetry on a bimaterial interface

2007

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[1] To better understand the asymmetric distribution of microearthquake aftershocks along the central San Andreas fault, we study dynamic models of slip-weakening ruptures on an interface separating differing elastic half-spaces. Subshear ruptures grow as slightly asymmetric bilateral cracks, with larger propagation velocities, slip velocities, and normal stress changes at the rupture front moving in the direction of slip of the medium with the lower shear wave speed (the southeast front, in the context of the San Andreas). When the SE front encounters a stress barrier, the tensile stress perturbation behind the rupture front continues forward and for a wide range of barrier strengths nucleates a dying slip pulse. This slip pulse smooths the stress field and reduces the static stress change beyond the SE front. Furthermore, because the tensile stress that carried the slip pulse into the barrier is a purely dynamic phenomenon, the SE rupture front can be left far below the failure threshold, while the NW front remains quite close to failure. Both mechanisms could contribute to the observed aftershock asymmetry. Formation of a robust slip pulse requires a peak tensile stress perturbation that approaches the nominal strength drop of the slip-weakening law. To achieve this while minimizing off-fault damage requires either substantial velocity contrasts or small reductions in friction. The simulations also show a pronounced asymmetry in the timescales over which barriers to the SE and NW experience increasing stresses, a result that has implications for the asymmetric distribution of subevents in compound earthquakes.

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“…The scheme is versatile and can handle a variety of applied tractions (Geubelle and Kubair, 2001), state-and rate-dependent cohesive (Kubair et al, 2002) and friction models (Rice et al, 2001). The spectral scheme has been derived for various material systems such as bimaterial interfaces (Geubelle and Breitenfeld, 1997;Breitenfeld and Geubelle, 1998), viscoelastic materials , and orthotropic solids (Hwang and Geubelle, 2000). In this article, we extend the spectral formulation to simulate spontaneous crack propagation in functionally graded materials under anti-plane shear loading conditions.…”

Section: Introductionmentioning

confidence: 99%

Mode-3 spontaneous crack propagation in unsymmetric functionally graded materials

Kulkarni

Pal

Kubair

2007

International Journal of Solids and Structures

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The effects of the inhomogeneous material property variation on the mode-3 crack propagation characteristics have been analyzed. The spectral form of the elastodynamic boundary integral equations are derived for a functionally graded material, which is used as the numerical tool in our analysis. The material property gradient is assumed to vary unsymmetrically in the direction normal to the fracture plane. A parametric study has been performed by systematically varying the inhomogeneity length scale. In comparison with a homogeneous material, an unsymmetric functionally graded material offers lesser fracture resistance. The fracture resistance progressively decreases with increase in inhomogeneity, quantified by the increase in crack sliding displacement jumps, crack tip velocities and accelerations. The material property inhomogeneity affects only the transient crack propagation velocities, while the quasi-steady-state velocity remains unaltered.

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Numerical analysis of dynamic debonding under 2D in-plane and 3D loading

Cited by 34 publications

References 13 publications

Workshops on Models of Fracture

Workshops on Models of Fracture

Aftershock asymmetry on a bimaterial interface

Mode-3 spontaneous crack propagation in unsymmetric functionally graded materials

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