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Strain energy density
Notched plates in mixed mode loading (I+II): a review based on the local strain energy density and the cohesive zone modelTwo procedures to evaluate fracture resistance of notched components are proposed in this contribution: the Strain Energy Density (SED) over a control volume and the Cohesive Zone Model (CZM). With the aim to simplify the application of the two fracture criteria, the concept of the ‘equivalent local mode I’ is presented.
Extension of linear elastic strain energy density approach to high temperature fatigue and a synthesis of Cu-Be alloy experimental testsThe present paper summaries the results from uniaxial-tension stress-controlled fatigue tests performed at different temperatures up to 650°C on Cu-Be specimens. Two geometries are considered: hourglass shaped and plates weakened by a central hole (Cu-Be alloy).
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Review of local strain energy density theory for the fracture assessment of V-notches under mixed mode loadingThe present work summarizes some recent experimental, theoretical and numerical results on brittle fracture of isostatic polycrystalline graphite. The analyses have been carried out on V-notched samples under mixed mode (I+II), torsion and compression loading, considering various combinations of the notch tip radius, opening angle and notch tilt angle.
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Some recent criteria for brittle fracture assessment under mode II loadingDifferent criteria are available in the literature to assess the fracture behaviour of sharp V-notches. A typical and well-known criterion is based on the application of the notch stress intensity factors (NSIFs), which are able to quantify the intensity of the stress fields ahead of the notch tip.
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Tensile fracture analysis of blunt notched PMMA specimens by means of the Strain Energy DensityIn this paper, a volume criterion based on a simple scalar quantity, the mean value of the strain energy (SED), has been used to assess the static strength of notched components made of Polymethylmethacrylate (PMMA).
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