Goutianos, Stergios

Sørensen, Bent F.

A method is developed to extract the fracture resistance and mode I cohesive law of nonlinear elastic-plastic materials using a Double Cantilever Beam (DCB) sandwich specimen loaded with pure bending moments. The method is based on the J integral which is valid for materials having a non-linear stress-strain relationship as long as there is no unloading at any material point. A numerical parameter study is performed for a wide range of material and specimen parameters to examine the accuracy of the method. In the range examined, the error of the method is less than 11% and thus it can be used to measure the fracture resistance experimentally and determine the mode I cohesive law including its shape

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A J integral based method to measure fracture resistance and cohesive laws in materialsexhibiting large scale plasticity - DTU Orbit (08/11/2017) A J integral based method to measure fracture resistance and cohesive laws in materials exhibiting large scale plasticityA method is developed to extract the fracture resistance and mode I cohesive law of nonlinear elastic-plastic materialsusing a Double Cantilever Beam (DCB) sandwich specimen loaded with pure bending moments. The method is based onthe J integral which is valid for materials having a non-linear stress-strain relationship as long as there is no unloading atany material point. A numerical parameter study is performed for a wide range of material and specimen parameters toexamine the accuracy of the method. In the range examined, the error of the method is less than 11% and thus it can beused to measure the fracture resistance experimentally and determine the mode I cohesive law including its shape. General informationState: PublishedOrganisations: Department of Wind Energy, Composites and Materials MechanicsAuthors: Sørensen, B. F. (Intern), Goutianos, S. (Intern)Publication date: 2014 Host publication informationTitle of host publication: Proceedings of the 16th European Conference on Composite Materials, ECCM 2014Main Research Area: Technical/natural sciencesConference: 16th European Conference on Composite Materials, Seville, Spain, 22/06/2014 - 22/06/2014Ceramics and Composites, Cohesive law, J integral, Non-linear material, Plasticity, Cantilever beams, Elastoplasticity,Fracture, Fracture toughness, Stress-strain curves, Unloading, Cohesive laws, Double cantilever beam sandwiches, Non-linear stress-strain, Nonlinear elastic plastics, Nonlinear materials, Numerical parameters, Numerical methodsSource: FindItSource-ID: 2288454258Publication: Research - peer-review › Article in proceedings – Annual report year: 2015 

A J integral based method to measure fracture resistance and cohesive laws in materials exhibiting large scale plasticity

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A J integral based method to measure fracture resistance and cohesive laws in materials exhibiting large scale plasticity

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