Fracture of Brittle Solids (Cambridge Solid State Science Series)

Lawn, B. R.; Wilshaw, T. R.; Rice, James R.

doi:10.1115/1.3424125

Cited by 159 publications

(212 citation statements)

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“…Indeed, K IC (and s R ) only represent a critical level for fast crack growth. Ceramic materials are susceptible to slow crack propagation at K I values under K IC [5]. This phenomenon is often referred as 'subcritical crack growth' with respect to a crack propagation for stress intensity factors under the toughness.…”

Section: Subcritical Crack Growth (Scg)mentioning

confidence: 99%

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Crack growth resistance of alumina, zirconia and zirconia toughened alumina ceramics for joint prostheses

et al. 2002

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Mono-phase bio-ceramics (alumina and zirconia) are widely used as femoral heads in total hip replacements (THR) as an alternative to metal devices. Unfortunately, the orthopaedic community reports significant in-vivo failures. Material scientists are already familiar with composites like alumina-zirconia. Since both are biocompatible, this could prove to be a new approach to implants. This paper deals with a new generation of alumina-zirconia nano-composites having a high resistance to crack propagation, and as a consequence may offer the option to improve lifetime and reliability of ceramic joint prostheses. The reliability of the above mentioned three bio-ceramics (alumina, zirconia and zirconia toughened alumina) for THR components is analysed based on the study of their slow crack-growth behaviour. The influence of the processing conditions on the microstructure development, of the zirconia toughened alumina composites and the effect of these microstructures, on its mechanical properties, are discussed. r

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Section: Subcritical Crack Growth (Scg)mentioning

confidence: 99%

“…Abrasion is even least when using ceramic femoral heads together with ceramic cup inserts [4]. However, ceramic materials are known to be brittle and susceptible to slow crack growth (SCG) [5].…”

Section: Introductionmentioning

confidence: 99%

Crack growth resistance of alumina, zirconia and zirconia toughened alumina ceramics for joint prostheses

et al. 2002

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“…For ω = 180 • , the theoretical value κ I (0) = 0.79 derives from the well known formula giving the stress intensity factor at the tip of a crack at a stress free edge in a half-space (Lawn, 1993) (keep in mind the normalization (8) and see the remark in Section 3.2).…”

Section: Stress Intensity Factor At the Tip Of The New Crackmentioning

confidence: 99%

Crack onset at a v-notch. Influence of the notch tip radius

Leguillon

Yosibash

2003

International Journal of Fracture

121

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Abstract.A criterion to predict crack onset at a sharp notch in homogeneous brittle materials has been presented in a previous paper of one of the authors. It is reviewed and improved herein. It fulfils both the energy and the strength criteria and takes an Irwin-like form involving the generalized intensity factor of the singularity governing the elastic behaviour in the vicinity of a notch tip. The prediction agrees fairly well with the experiments although it slightly underestimates the experimental measures. A cause of this discrepancy can be that a small notch tip radius blunts the sharp corner. It is analysed in this paper by means of matched asymptotics involving 2 small parameters: a micro-crack increment length and the notch tip radius. A correction is brought to the initial prediction and a better agreement is obtained with experiments on PMMA notched specimens. Experiments performed on a stiffer material (Alumina/Zirconia) show that it is less sensitive to small notch tip radii. A remaining small discrepancy between experiments and predictions can be due to some non linear behaviour of the materials near the notch tip. In addition, without new developments, the method allows to determine the stress intensity factor at the tip of a short crack emanating from a sharp or a rounded v-notch.

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“…In fracture mechanics the stress intensity factor for crack systems in uniform loading is defined as KI = m a(11c)l/2 lLawn and Wilshaw, 1975], where m is a sionless factor depending on geometry, a remote applied stress, and c is the half of the crack.…”

Section: Physical Basismentioning

confidence: 99%

Radon content of groundwater as an earthquake precursor: Evaluation of worldwide data and physical basis

Hauksson¹

1981

J. Geophys. Res.

182

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Fracture of Brittle Solids (Cambridge Solid State Science Series)

Abstract: basis of this limited usefulness of the second type of research that the first group has claimed the superiority of its own methods, although the latter have also been known to be ineffective when confronted with highly complex, but realistic design problems.

Cited by 159 publications

References 0 publications

Crack growth resistance of alumina, zirconia and zirconia toughened alumina ceramics for joint prostheses

Crack growth resistance of alumina, zirconia and zirconia toughened alumina ceramics for joint prostheses

Crack onset at a v-notch. Influence of the notch tip radius

Radon content of groundwater as an earthquake precursor: Evaluation of worldwide data and physical basis

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