On cracks emanating from wedges in expanded PVC foam

Grenestedt, Joakim L; Hallström, Stefan; Kuttenkeuler, Jakob

doi:10.1016/0013-7944(95)00231-6

Cited by 41 publications

(19 citation statements)

References 5 publications

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“…The crack orientations predicted by Eq. (13) are also shown with the experimental results in Figs. 11(b)-(f).…”

Section: Verification Of the Proposed Fracture Criterionsupporting

confidence: 53%

“…The crack orientations measured for the broken specimens will also be compared with the results predicted by the criterion of Eq. (13).…”

Section: Verification Of the Proposed Fracture Criterionmentioning

confidence: 95%

“…The criterion was formulated by combining the normal stress in perpendicular direction and the shear stress in parallel direction to crack propagation. Grenestedt et al [13] carried out a similar research on cracks and V-notches in an expanded polyvinyl chloride (PVC) form. Hallstrőm and Grenestedt [14] also studied mixed mode problems of cracks and V-notches.…”

Section: Introductionmentioning

confidence: 99%

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A unified brittle fracture criterion for structures with sharp V-notches under mixed mode loading

Kim

Cho

2008

J Mech Sci Technol

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A unified brittle fracture criterion for cracks and V-notches under mixed mode loading is proposed by extending the maximum circumferential stress criterion and Novozhilov's criterion. The mixed mode fracture toughness and crack orientation of PMMA plates with a sharp V-notch are predicted by the proposed criterion. Tests were also carried out in order to investigate the mixed mode fracture of the PMMA plates. The fracture criterion is validated by comparison to experimental results.

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“…The crack orientations predicted by Eq. (13) are also shown with the experimental results in Figs. 11(b)-(f).…”

Section: Verification Of the Proposed Fracture Criterionsupporting

confidence: 53%

“…The crack orientations measured for the broken specimens will also be compared with the results predicted by the criterion of Eq. (13).…”

Section: Verification Of the Proposed Fracture Criterionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

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A unified brittle fracture criterion for structures with sharp V-notches under mixed mode loading

Kim

Cho

2008

J Mech Sci Technol

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“…In this series of test, the failure loads show an oscillating trend between 0°and 90°, with two local minima for 15°and 60°, followed by the usual ascending branch after 90°. Other tests on sharp V-notched specimens were performed by Grenestedt et al (1996), by and by Carpinteri et al (2009), who tested expanded PVC foam, PMMA and polystyrene specimens respectively. In such tests, the failure loads were always increasing with the notch angle, but they are of little help to decide whether a minimum is present or not, since only one or no one geometry was tested in the range 0°-90°.…”

Section: Introductionmentioning

confidence: 99%

On the most dangerous V-notch

Carpinteri

Cornetti

Pugno

et al. 2010

International Journal of Solids and Structures

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a b s t r a c tThe determination of the failure load for brittle or quasi-brittle specimens containing a re-entrant corner has been faced by several authors, whose approaches are available in the Scientific Literature. However, up to now, little attention has been paid to the presence of a minimum, i.e. an angle at which the critical load attains its minimum value. Even if the minimum was detected in several experiments, it was not highlighted or it was considered as a mere consequence of the scattering of experimental data. Restricting the analysis to a sharp V-notched infinite slab under a remote tensile load, the problem is fully investigated in this paper. It is shown that a minimum, more or less pronounced according to the brittleness number, is always present. It means that the edge crack is not the most dangerous configuration, although the notch opening angle providing the minimum failure load tends to vanish for large notch depths as well as for very brittle materials.

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“…Severyn (1994) and Severyn et al (1997) proposed a failure criterion for notches, in which initiation of cracking is predicted to occur when a mean value of singular stress over a specified damage segment reaches its critical value. Grenestedt et al (1996) used a point stress criterion, in which fracture is predicted to occurs when the maximum tangential stress at a specified radial distance from the notch tip reaches a characteristic stress. Seweryn and Lukaszewicz (2002) used the strain energy release rate criterion and the strain energy density criterion to evaluate the critical loads and directions of crack initiation for notches.…”

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confidence: 99%

Investigation of failure criteria for a sharp notch

Chen

Ozaki

2008

Int J Fract

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In this study, a method of evaluating the static strength of a V-shaped notch based on the singular stress field at the notch tip is studied. The singular stress fields is defined by two parameters, K I,λ 1 and K II,λ 2 , which correspond to the intensities of symmetric stress field and the skew-symmetric field, respectively. Four kinds of fracture criteria are considered; two of them are based on the tensile strength σ B and the other two are based on the fracture toughness K I C . The usefulness of the criteria is investigated through the experimental results carried out on plane specimens of acrylic resin having a sharp notch for various notch configurations such as the opening angle, the inclined angle and the notch depth. It is shown that the criteria using stress intensity factor and the energy release rate not sensitive to the length of the virtual crack ε.

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On cracks emanating from wedges in expanded PVC foam

Cited by 41 publications

References 5 publications

A unified brittle fracture criterion for structures with sharp V-notches under mixed mode loading

A unified brittle fracture criterion for structures with sharp V-notches under mixed mode loading

On the most dangerous V-notch

Investigation of failure criteria for a sharp notch

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