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Nominal strength of quasi-brittle open hole specimens under biaxial loading conditions

One of the main purposes for an accurate strength prediction is to get a reliable design tool of a given structure. Since most of aircraft and aerospace structures contain many holes and are subject to multidirectional loading conditions, due to stress concentration, cracks will necessarily emanate from these holes before failure. Therefore, the nominal strength prediction of open hole specimens under biaxial loading conditions is very necessary for the safe design of these structures. The main goal of this work is to develop an analytical model able to predict the nominal strength and the failure envelope of isotropic quasi-brittle open hole specimens under biaxial loading conditions. In this model, the nominal strength is analyzed taking into account the hole radius and the biaxiality load ratio. The model is formulated based on the cohesive zone model considering various shapes of the cohesive law. Other approaches such as the different methods of the critical distance theories are also presented and compared with the results of the cohesive crack model

The first author would like to thank Generalitat de Catalunya for the FI pre-doctorate grant 2012FI. The authors acknowledge the financial support of the Ministerio de Ciencia e Innovacion under the project MAT2012-37552-C03-03

Elsevier

Manager: Ministerio de Economía y Competitividad (Espanya)
Generalitat de Catalunya. Agència de Gestió d’Ajuts Universitaris i de Recerca
Author: Kabeel, Abdallah Mahmoud Bayoumi
Maimí Vert, Pere
Gascons i Clarió, Narcís
González Juan, Emilio Vicente
Abstract: One of the main purposes for an accurate strength prediction is to get a reliable design tool of a given structure. Since most of aircraft and aerospace structures contain many holes and are subject to multidirectional loading conditions, due to stress concentration, cracks will necessarily emanate from these holes before failure. Therefore, the nominal strength prediction of open hole specimens under biaxial loading conditions is very necessary for the safe design of these structures. The main goal of this work is to develop an analytical model able to predict the nominal strength and the failure envelope of isotropic quasi-brittle open hole specimens under biaxial loading conditions. In this model, the nominal strength is analyzed taking into account the hole radius and the biaxiality load ratio. The model is formulated based on the cohesive zone model considering various shapes of the cohesive law. Other approaches such as the different methods of the critical distance theories are also presented and compared with the results of the cohesive crack model
The first author would like to thank Generalitat de Catalunya for the FI pre-doctorate grant 2012FI. The authors acknowledge the financial support of the Ministerio de Ciencia e Innovacion under the project MAT2012-37552-C03-03
Document access: http://hdl.handle.net/2072/296128
Language: eng
Publisher: Elsevier
Rights: Tots els drets reservats
Subject: Materials laminats
Laminated materials
Assaigs de materials
Materials -- Testing
Materials compostos -- Mètodes de simulació
Composite materials -- Simulation methods
Resistència de materials
Strength of materials
Mecànica de fractura
Fracture mechanics
Title: Nominal strength of quasi-brittle open hole specimens under biaxial loading conditions
Type: info:eu-repo/semantics/article
Repository: Recercat

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