Abstract
The present paper illustrates a modelling technique of void damage prediction using constitutive Rousselier damage model in wingbox aircraft structure. The high possibility of aluminium wingbox structure to deform during operating become a driving force in this study. The Rousselier model is implemented by the user-defined material subroutine UMAT in the ABAQUS / Standard. The wingbox is a part of a commercially-made commuter aircraft prototype, in which steady aerodynamic pressure is applied as the quasi-static, ranging from cruise load factor until the ultimate load factor. This analysis is divided into three assessments: load factor assessment, damage detection and implementation of Rousselier-UMAT-XFEM (RuX) model solution. The results indicate the maximum stress concentration occurs at the bottom-root part of the skin. The void volume fraction and the crack grow as the load factor increases to the ultimate load factor. A comparison with the literature is shown in some details.
Highlights
Aircraft structural members are designed to carry a load and resist the stress during operation
For example of the model application such as in predicting the fracture resistant behaviour of Zircaloy fuel pin specimens [8], simulation damage behaviour in eletron beam welded joints [9] and welded Esshete 1250 pipe [10]. This model can predict the behaviour of materials from the micromechanics processes leading to ductile fracture [11, 12]
This research has presented a structural analysis of aluminium wingbox aircraft structure based on quasi-static analysis using constitutive Rousselier damage model
Summary
Aircraft structural members are designed to carry a load and resist the stress during operation. The numerical inspection based on Rousselier damage criteria of CDM model is investigated in wingbox structure where most of the wings’s load is carried [7]. For example of the model application such as in predicting the fracture resistant behaviour of Zircaloy fuel pin specimens [8], simulation damage behaviour in eletron beam welded joints [9] and welded Esshete 1250 pipe [10]. This model can predict the behaviour of materials from the micromechanics processes leading to ductile fracture [11, 12]. Further investigation is carried out by implementing the Rousselier model with the XFEM solution, so called RuX model, to predict the void damage with the crack development in the material
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