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. | Notched plates in mixed mode loading I II a review based on the local strain energy density and the cohesive zone model Engineering Solid Mechanics 2017 1-8 Contents lists available at GrowingScience Engineering Solid Mechanics homepage esm Notched plates in mixed mode loading I II a review based on the local strain energy density and the cohesive zone model F. Bertoa and J. Gomezb a Department of Industrial and Mechanical Engineering NTNU Trondheim Norway b Advanced Material Simulation . Asturias 3. Bilbao 48015 Spain A R T I C L EI N F O ABSTRACT Article history Two procedures to evaluate fracture resistance of notched components are proposed in this Received 6 July 2016 contribution the Strain Energy Density SED over a control volume and the Cohesive Zone Accepted 3 November 2016 Model CZM . With the aim to simplify the application of the two fracture criteria the concept Available online of the equivalent local mode I is presented. The control volume of the SED criterion and the 6 November 2016 Keywords cohesive crack of the CZM have been rotated along the notch edge and centered with respect Notched plates to the point where the elastic principal stress is maximum. Numerical predictions are compared Mixed mode loading with experimental results from U and V shaped notches under three point bending with notch Local strain energy density root radius ranging from to mm. In parallel the loading conditions vary from pure mode Cohesive zone model 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. 2017 Growing Science Ltd. All rights reserved. 1. Introduction In recent years the mode I fracture of notched samples made of brittle or quasi-brittle materials has been studied by different authors Carpinteri 1987 Knésl 1991 Nui et al. 1994 Seweryn 1994 Gómez et al. 2000 Gomez amp Elices 2003 .
