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1.

Notched plates in mixed mode loading (I+II): a review based on the local strain energy density and the cohesive zone mode Pages 1-8 Right click to download the paper Download PDF

Authors: F. Berto, G. Gomez

DOI: 10.5267/j.esm.2016.11.002

Keywords: Notched plates, Mixed mode loading, Local strain energy density, Cohesive zone model

Abstract:
Two 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. The control volume of the SED criterion and the cohesive crack of the CZM, have been rotated along the notch edge and centered with respect to the point where the elastic principal stress is maximum. Numerical predictions are compared with experimental results from U and V shaped notches under three point bending with notch root radius ranging from 0.2 to 4.0 mm. In parallel the loading conditions vary, from pure mode I to a prevailing mode II. All specimens were made of PMMA and tested at -60°C. The good agreement between theory and experimental results adds further confidence to the proposed fracture criteria.
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Journal: ESM | Year: 2017 | Volume: 5 | Issue: 1 | Views: 437 | Reviews: 0

 

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