Numerical inspection based on Quasi-Static Analysis using Rousselier Damage Model for aluminium wingbox aircraft structure

• Main Authors: Ahmad, Meor iqram Meor, Curiel-Sosa, J.L., Akbar, Mahesa L., Abdullah, Nur Azam
• Format: Article
• Language: English; English
• Published: IOP Publishing Ltd 2018
• Subjects: QC Physics; T Technology (General)
• Online Access: http://irep.iium.edu.my/73585/1/Ahmad_2018_J._Phys.__Conf._Ser._1106_012013.pdf; http://irep.iium.edu.my/73585/7/73585_Numerical%20inspection%20based%20on%20Quasi-Static%20Analysis_slide.pdf; http://irep.iium.edu.my/73585/; https://iopscience.iop.org/article/10.1088/1742-6596/1106/1/012013/pdf

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.