Prediction of Fracture Energy and Flaw Size in Glasses from Measurements of Mirror Size

Mecholsky, J. J.; Rice, R. W.; Freiman, S. W.

doi:10.1111/j.1151-2916.1974.tb11377.x

Cited by 237 publications

(70 citation statements)

References 12 publications

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“…For these specimens, γ WOF measured using the cross-sectional area was calculated to be 3.5 + 0.1 J/m 2 . This agrees with the fracture energy determined from traditional fracture mechanics test [γ = 3.5 J/m 2 ] (Mecholsky et al 1974). …”

Section: Resultssupporting

confidence: 75%

Estimation of fracture energy from the work of fracture and fracture surface area: I. Stable crack growth

2009

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Past attempts to determine fracture energy by the work of fracture (γ WOF ) technique, in most cases, have resulted in greater estimates due to the use of the cross-sectional area rather than the actual area of the fracture surface in calculations. The actual fracture surface area A F of soda-lime-silica glass chevronnotch flexure specimens was estimated using atomic force microscopy. An equation for A F was developed using the data from these tests. The use of A F in the equation for γ WOF resulted in γ WOF values less than values reported from traditional fracture mechanics tests and from those obtained using the cross-sectional area. The implication is that the tortuosity of the fracture surface contributes to the energy expended during fracture and should be accounted for in the calculation of the fracture energy. These calculations provide an estimate for the minimum energy required to break bonds in the fracture process.

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Section: Resultssupporting

confidence: 75%

Estimation of fracture energy from the work of fracture and fracture surface area: I. Stable crack growth

2009

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“…Values for A reported for both silicate glasses fall in the range of 1.8-2.2 MPa·m ½ . 9)-11) Mecholsky et al 9),12) have demonstrated a general relation between the radius of the fracture mirror and the size, a, of the critical flaw initiating the fracture. The size ratio rm/a found valid for most silicate glasses is 10/1.…”

Section: Theorymentioning

confidence: 99%

“…These ratios are comparable to the ratios of 10/1 generally reported in literature for silicate glasses. 9) Hereby it is …”

Section: )-11)mentioning

confidence: 99%

Fractography and tensile strength of glass wool fibres

Lund

Yue

2008

J. Ceram. Soc. Japan

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Mechanical reliability such as strength and brittleness is of great interest for application of brittle materials, i.e. glasses and glass fibres. In this paper we study the fracture behaviour and the tensile strength of glass wool fibres (GWFs) of both basalt and E-glass compositions, which play an important role in both transportation and application of GWFs (as insulation material). GWFs are tested in uniaxial tension. The surfaces of the fractured fibres are imaged using scanning electron microscopy. Three main types of fracture surfaces produced in tensile stress are observed, all of which include fracture mirror, mist and hackle features comparable to fracture surfaces of bulk glass and continuous fibres. The three types are: a) surface without visible origin; b) surface with visible origin; c) surfaces originated from internal pores. The relations between the fracture mirror size and the mechanical strength shown for bulk glass and continuous glass fibres are also valid for GWFs. Relation between the fractographic observations and the strength Weibull distributions are discussed in relation to chemical composition and homogeneity.

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“…The fracture surface of a failed glass fibres shows three characteristic regions: 1 the mirror zone, a smooth planar surface with a mirror-like finish; 2 the mist region, an area where small radial ridges can be seen; 3 the hackle, a region showing larger radial ridges [15J [16] [17]. The fracture surface is evident in specimens tested in air and those that have undergone stress corrosion.…”

Section: Fractography and Life Predictionmentioning

confidence: 99%

Stress corrosion of GRP tensile strength members in optical fibre cables

Leetham

Kukureka

1993

J. Phys. IV France

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Pultruded glass fibre reinforced plastics (or GRP) rod is being increasingly used in the area of cable design, used for strength members in optical fibre cables. The possibility of failure by the process of stress corrosion has resulted in the need to determine the reliability of the dielectric cables when in service. The viability of life predictions being made from the study of stress corrosion fracture surfaces is investigated. The production of static fatigue data for composite materials is needed to enable any accurate predictions to be made.

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Prediction of Fracture Energy and Flaw Size in Glasses from Measurements of Mirror Size

Cited by 237 publications

References 12 publications

Estimation of fracture energy from the work of fracture and fracture surface area: I. Stable crack growth

Estimation of fracture energy from the work of fracture and fracture surface area: I. Stable crack growth

Fractography and tensile strength of glass wool fibres

Stress corrosion of GRP tensile strength members in optical fibre cables

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