An experimental and numerical investigation of the static and dynamic constitutive behaviour of aluminium alloys

Abotula, Sandeep; Chalivendra, Vijaya

doi:10.1177/030932471004500808

Cited by 29 publications

(13 citation statements)

References 8 publications

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“…It reveals that the influence of strain rate effects on the result of the explosion simulation, where expected strain rates are much higher than in case of this study may, in fact, be negligible. A similar conclusion may be drawn from Abotula and Chalivendra (2010). Nevertheless, these effects will be included in future quantitative analyses aiming at a higher accuracy of the outcome.…”

Section: Discussionsupporting

confidence: 64%

Agricultural aircraft wing slat tolerance for bird strike

Deskiewicz

Perz

2017

AEAT

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Purpose The aim of this study is to assess and describe possible consequences of a bird strike on a Polish-designed PZL-106 Kruk agricultural aircraft. Due to its susceptibility to such events, a wing slat has been chosen for analysis. Design/methodology/approach Smooth particle hydrodynamics (SPH) formulation has been used for generation of the bird finite element model. The simulations were performed by the LS-Dyna explicit finite element analysis software. Several test cases have been analysed with differing parameters such as impact velocity, initial velocity vector direction, place of impact and bird mass. Findings Results of this study reveal that the structure remains safe after an impact at the velocity of 25 m/s. The influence of bird mass on slat damage is clearly observable when the impact velocity rises to 60 m/s. Another important finding was that in each case where the part did not withstand the applied load, it was the lug where first failure occurred. Some of the analysed cases indicated the possibility a consequent wing box damage. Practical implications This finding provides the manufacturer an important insight into the behaviour of the slat and suggests that more detailed analysis of the current lug design might improve the safety of the structure. Originality/value Even though similar analyses have been performed, they tended to focus on large transport aircraft components. This investigation will enhance our understanding of structural response of small, low-speed aircraft to a bird impact, which is a realistic scenario for the chosen case of an agricultural plane.

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Section: Discussionsupporting

confidence: 64%

Agricultural aircraft wing slat tolerance for bird strike

Deskiewicz

Perz

2017

AEAT

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“…As a rst attempt to keep things simple, a linear hardening model is selected. As a consequence, the model only involves the yield stress (σ y ) and the hardening modulus (H ) (12).…”

Section: Virtual Elds In Homogeneous Plasticitymentioning

confidence: 99%

Identification of the Dynamic Properties of Al 5456 FSW Welds Using the Virtual Fields Method

Louëdec

Pierron

Sutton

et al. 2015

J. dynamic behavior mater.

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The present study focuses on the identication of the evolution of the dynamic elasto-plastic properties of Al 5456 FSW welds. An innovative method is proposed to make best use of the data collected with full-eld measurements during dynamic experiments, and achieve identication of the mechanical properties of heterogeneous materials without requiring measurement of the load. Compressive specimens have been submitted to high strain-rate loading through a Split Hopkinson Pressure Bar (SHPB) device while displacement elds were measured using full-eld measurement techniques. Two sets of experiments have been performed using two dierent methods: the Grid Method and Digital Image Correlation. Afterwards, the identication of the elastic and plastic properties of the material was carried out using the Virtual Fields Method. Finally, identication of the evolution of the yield stress throughout the weld has been achieved for strain-rates of the order of 10 3 s −1 .

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“…, 2000; Li et al. , 2009; Abotula and Chalivendra, 2010) and torsional (Johnson et al. , 1983) experiments of the alloy AA2024-T3 (Barlat et al.…”

Section: Introductionmentioning

confidence: 99%

“…, 2001; Rasaee and Mirzaei, 2019) performed at different strain rates. Further, for numerical investigations, Johnson–Cook (JC) model (Johnson, 1983) is popularly used, for studying the strain rate-based deformation of AA2024 alloy (Abotula and Chalivendra, 2010; Rasaee and Mirzaei, 2019), due to its simplicity and easy evaluation of material constants involved. Apart from the JC model, Mechanical Threshold Stress (MTS) (Follansbee and Kocks, 1988) and Zerilli-Armstrong (ZA) (Zerilli and Armstrong, 1987) are among the alternative constitutive models used for this purpose.…”

Section: Introductionmentioning

confidence: 99%

“…, 2018). Most of the numerical investigations on strain rate-based deformation of AA2024 alloy are limited to the use of phenomenological macroscopic (Abotula and Chalivendra, 2010; Rasaee and Mirzaei, 2019) constitutive models. However, these constitutive models do not seem to be particularly effective at predicting the deformation behavior of polycrystalline materials since they do not take into account actual microscopic mechanisms of deformation.…”

Section: Introductionmentioning

confidence: 99%

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Computational homogenization based crystal plasticity investigation of deformation behavior of AA2024-T3 alloy at different strain rates

Singh

Vohra

et al. 2023

MMMS

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PurposeModeling of material behavior by physically or microstructure-based models helps in understanding the relationships between its properties and microstructure. However, the majority of the numerical investigations on the prediction of the deformation behavior of AA2024 alloy are limited to the use of phenomenological or empirical constitutive models, which fail to take into account the actual microscopic-level mechanisms (i.e. crystallographic slip) causing plastic deformation. In order to achieve accurate predictions, the microstructure-based constitutive models involving the underlying physical deformation mechanisms are more reliable. Therefore, the aim of this work is to predict the mechanical response of AA2024-T3 alloy subjected to uniaxial tension at different strain rates, using a dislocation density-based crystal plasticity model in conjunction with computational homogenization.Design/methodology/approachA dislocation density-based crystal plasticity (CP) model along with computational homogenization is presented here for predicting the mechanical behavior of aluminium alloy AA2024-T3 under uniaxial tension at different strain rates. A representative volume element (RVE) containing 400 grains subjected to periodic boundary conditions has been used for simulations. The effect of mesh discretization on the mechanical response is investigated by considering different meshing resolutions for the RVE. Material parameters of the CP model have been calibrated by fitting the experimental data. Along with the CP model, Johnson–Cook (JC) model is also used for examining the stress-strain behavior of the alloy at various strain rates. Validation of the predictions of CP and JC models is done with the experimental results where the CP model has more accurately captured the deformation behavior of the aluminium alloy.FindingsThe CP model is able to predict the mechanical response of AA2024-T3 alloy over a wide range of strain rates with a single set of material parameters. Furthermore, it is observed that the inhomogeneity in stress-strain fields at the grain level is linked to both the orientation of the grains as well as their interactions with one another. The flow and hardening rule parameters influencing the stress-strain curve and capturing the strain rate dependency are also identified.Originality/valueComputational homogenization-based CP modeling and simulation of deformation behavior of polycrystalline alloy AA2024-T3 alloy at various strain rates is not available in the literature. Therefore, the present computational homogenization-based CP model can be used for predicting the deformation behavior of AA2024-T3 alloy more accurately at both micro and macro scales, under different strain rates.

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An experimental and numerical investigation of the static and dynamic constitutive behaviour of aluminium alloys

Cited by 29 publications

References 8 publications

Agricultural aircraft wing slat tolerance for bird strike

Agricultural aircraft wing slat tolerance for bird strike

Identification of the Dynamic Properties of Al 5456 FSW Welds Using the Virtual Fields Method

Computational homogenization based crystal plasticity investigation of deformation behavior of AA2024-T3 alloy at different strain rates

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