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Authors
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Schüller, T. ; Lauke, B.
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Title
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Finite-Element-Simulation of Interfacial Crack Propagation: Cross-check of Simulation Results with the Essential Work of Interfacial Fracture Method
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Date
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01.03.2006
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Number
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13290
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Abstract
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An advanced finite-element model for the complete failure process of a double notched specimen with crack tip blunting caused by yielding and subsequent crack propagation is used for the simulation of realistic specimens. Cracks in a homogeneous material and bimaterial cracks are studied. The calculated load-displacement curves show generally the shape known from experiments and theoretical considerations. The simulation allows determination of a working range of set up parameters like geometry, test speed or clamping conditions.<br />The numerical model simulates crack propagation on the basis of a criterion which is similar to the energy release rate. The essential work of interfacial fracture method provides a method to determine the fracture toughness from load-displacement curves. This method is well suited to check the numerical simulation because both use an energy based failure criterion. If applied to simulated load-displacement curves the resulting essential work of interfacial fracture should directly match the fracture criterion used as input for the simulation.<br />In fact, the data reduction of the simulated curves results in values for the fracture toughness that almost perfectly match the input values of the simulation. This agreement is a strong argument for the consistency of the simulation and the data reduction scheme.
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Publisher
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Key Engineering Materials
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Wikidata
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Citation
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Key Engineering Materials 312 (2006) 9-14
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DOI
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https://doi.org/www.scientific.net/KEM.312.9
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Tags
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finite-element simulation crack propagation large scale yielding interface -
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