Nano-ductile crack propagation in glasses under stress corrosion: spatiotemporal evolution of damage in the vicinity of the crack tip

Prades, Silke; Bonamy, Daniel; Dalmas, Davy; Bouchaud, Élisabeth; Guillot, Claude

doi:10.1016/j.ijsolstr.2004.06.024

Cited by 47 publications

(55 citation statements)

References 19 publications

(35 reference statements)

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“…These velocities were found to be v CT = 4 × 10 −12 m/s, v FF = 1.1 × 10 −11 m/s and v BF = 1.2 × 10 −11 m/s for the main CT, the FF and the BF of the cavity, respectively, i.e. significantly smaller than the mean CT velocity v = 4 × 10 −11 m/s as measured optically (Prades et al, 2005a). In other words, the crack growth velocity as observed at the continuum scale is dominated by the accelerating phases corresponding to cavity coalescence with the main crack front.…”

Section: Kinematics Of Damage Cavitiesmentioning

confidence: 67%

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Nanoscale damage during fracture in silica glass

et al. 2006

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We report here atomic force microscopy experiments designed to uncover the nature of failure mechanisms occuring within the process zone at the tip of a crack propagating into a silica glass specimen under stress corrosion. The crack propagates through the growth and coalescence of nanoscale damage spots. This cavitation process is shown to be the key mechanism responsible for damage spreading within the process zone. The possible origin of the nucleation of cavities, as well as the implications on the selection of both the cavity size at coalescence and the process zone extension are finally discussed.

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Section: Kinematics Of Damage Cavitiesmentioning

confidence: 67%

“…The experimental set-up has been described in detail in Prades et al (2005a) and is briefly recalled below. Fracture was performed on double cleavage drilled compression parallelepipedic samples (size 5 × 5 × 25 mm 3 ) with a cylindrical hole drilled in the center (radius 0.5 mm).…”

Section: Methodsmentioning

confidence: 99%

Nanoscale damage during fracture in silica glass

et al. 2006

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“…(a) Silica fracture surfaces were obtained by applying a DCDC (Double Cleavage Drilled Compression) to parallelepipedic (5 × 5 × 25 mm 3 ) samples under stress corrosion in mode I (see Prades et al (2004) for details). After a transient dynamic regime, the crack propagates at a slow velocity through the specimen under stress corrosion.…”

Section: Description Of Fracture Tests and Surface Scanningmentioning

confidence: 99%

Anisotropic self-affine properties of experimental fracture surfaces

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Bonamy²,

Auradou

et al. 2006

Int J Fract

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Abstract. The scaling properties of post-mortem fracture surfaces of brittle (silica glass), ductile (aluminum alloy) and quasi-brittle (mortar and wood) materials have been investigated. These surfaces, studied far from the initiation, were shown to be self-affine. However, the Hurst exponent measured along the crack direction is found to be different from the one measured along the propagation direction. More generally, a complete description of the scaling properties of these surfaces call for the use of the 2D height-height correlation function that involves three exponents ζ ≃ 0.75, β ≃ 0.6 and z ≃ 1.25 independent of the material considered as well as of the crack growth velocity. These exponents are shown to correspond to the roughness, growth and dynamic exponents respectively , as introduced in interface growth models. They are conjectured to be universal.

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“…Indeed, in a quasibrittle material such as mortar, the process zone is very rapidly macroscopic in size and, as a consequence, its evolution is actually influenced all along by boundary conditions and hence by the specimen size. On the contrary, in materials like glasses, where the process zone size is always small compared to the specimen dimensions (the process zone does not exceed a few hundreds of nanometers as shown by Prades et al (2004)), this evolution is unlikely to be driven by boundary conditions imposed by the finite sample size. However, a process zone develops as soon as a crack is introduced into the sane material and submitted to an external stress.…”

Section: Size Effectmentioning

confidence: 99%

Scaling properties of mortar fracture surfaces

et al. 2006

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Scaling properties of mortar crack surfaces are studied from mode I fracture specimens of six different sizes. Fracture surfaces initiated from a straight notch exhibit an anomalous dynamic scaling which involves two independent roughness indices: the universal local roughness exponent ζ loc ≈ 0.8 and the global roughness exponent, estimated to ζ 1.35. We show that there exists a linear relationship between the specimen size and the maximum self-affine correlation length inducing a size effect on the roughness magnitude at saturation and this especially for the smallest length scales. Finally, we argue that anomalous roughening could be an inheritance of the changes in long range elastic interactions which take place in the fracture process zone of quasibrittle materials.

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Nano-ductile crack propagation in glasses under stress corrosion: spatiotemporal evolution of damage in the vicinity of the crack tip

Cited by 47 publications

References 19 publications

Nanoscale damage during fracture in silica glass

Nanoscale damage during fracture in silica glass

Anisotropic self-affine properties of experimental fracture surfaces

Scaling properties of mortar fracture surfaces

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