Structural overloading evaluation based on the identification of subcritical crack increments

Šedek, Jakub; Běhal, Jiří

doi:10.1016/j.engfailanal.2015.01.016

Cited by 2 publications

(1 citation statement)

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“…Presented approach of equivalent joint stiffness can be used in any FE model containing joints to decrease the complexity of the model and to increase the representativeness. For example, the analysis of lower root spar assembly of a sailplane was performed employing presented approach (Šedek et al , 2015). The crack growth in the flange was analysed to obtain the fatigue life and to assess the load level which were close to the critical load of the structure.…”

Section: Using the Equivalent Joint Stiffness Approach In The Analysis Of A Wing Sparmentioning

confidence: 99%

Magna-Lok rivet joint and the stiffness-equivalent FE model

Šedek¹,

Růžek²

2019

AEAT

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Purpose The purpose of this paper is to present a methodology for the determination of the stiffness when using simplified substitutive model of the joint. The usage of detailed finite element (FE) model of the joint in complex assemblies is not convenient; therefore, the substitutive model of the joint is used in FE models. Design/methodology/approach The detailed and simplified FE model of the joint is created in ABAQUS software and the analysis as well. The results of displacements are used for the determination of the stiffness of connecting element in simplified substitutive FE model. The approach is presented based on the general view on the different regions in the joint. Findings A simple FE modelling approach for the joint including the equivalent stiffness is presented. The particular solution is performed for Magna-Lok type of the rivet. The results show the same displacement for the detailed and simplified FE models. The analytical formula for stiffness determination in the load case with minimal secondary bending is introduced. Practical implications The approach for stiffness determination is straightforward and so no stiffness “tuning” is necessary in the simplified FE model. Originality/value The new approach for definition of simple FE model of the joint is introduced. It is not necessary to model a complex structure with detailed joints. The equivalent stiffness can be determined by presented procedure for every joint without limitation of the type.

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Section: Using the Equivalent Joint Stiffness Approach In The Analysis Of A Wing Sparmentioning

confidence: 99%