Testing and modelling of stiffened aluminium panels subjected to quasi-static and low-velocity impact loading. (December 2017)

• Record Type: Journal Article
• Authors: Morin, D.; Kaarstad, B.L.; Skajaa, B.; Hopperstad, O.S.; Langseth, M.
• Is Part Of: International journal of impact engineering. Volume 110(2017)
• Page Start: 97
• Page End: 111
• Publication Date: 2017-12
• Subjects: Aluminium alloys -- Impact loading -- Design -- Finite element analysis; Impact -- Periodicals; Shock (Mechanics) -- Periodicals; Impact -- Périodiques; Choc (Mécanique) -- Périodiques; Impact; Shock (Mechanics); Periodicals; 620.1125
• DOI: 10.1016/j.ijimpeng.2017.03.002
• Languages: English
• ISSNs: 0734-743X

Abstract

Highlights: Aluminium stiffened panels are tested under quasi-static and low-velocity loading conditions. A constitutive model and calibration method suitable within an industrial context are proposed. The proposed method gives a good correlation to the experimental data. Abstract: The behaviour and failure of stiffened panels made of the aluminium alloy AA6082-T6 is investigated under quasi-static and low-velocity impact loading conditions. The strain rate and inertia effects are found to be negligible suggesting that quasi-static tests might be representative for low-velocity impacts where a large mass is placed on the impactor. A simplified approach to the finite element modelling of aluminium panels under impact loading, including a regularised failure criterion, is proposed and validated against the experimental data. The effect of mesh size is investigated with shell elements of various sizes in the range from 1 to 5 times the thickness. A good correlation is obtained between experiments and simulations for fine meshes, while large shell elements have difficulties to initiate and propagate properly the observed cracks.