Study on the Fracture Behaviour of 6061 Aluminum Alloy Extruded Tube during Different Stress Conditions

Hong, Tengjiao; Ding, Fengjuan; Cao, Feng; Zhang, Hua; Zeng, Qiliang; Wang, Juan

doi:10.3390/cryst13030489

Cited by 3 publications

(1 citation statement)

References 16 publications

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“…Uniaxial tensile, notched tensile, central hole tensile, smiley shear tensile, and punch specimens were tested using optical measurement and numerically mapped for the model parametrisation. In [7] Hong et al investigated the fracture behaviour of the aluminium alloy 6061 from an extruded tube using circular arc, shear, arcshaped notched, and V-shaped notched tensile specimens. The tests were performed using optical measurement, numerically modelled, and evaluated to fit the JC failure model [8].…”

Section: Introductionmentioning

confidence: 99%

Failure Modelling of CP800 Using Acoustic Emission Analysis

2023

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Advanced high-strength steels (AHHS) are widely used in many production lines of car components. For efficient design of the forming processes, numerical methods are frequently applied in the automotive industry. To model the forming processes realistically, exact material data and analytical models are required. With respect to failure modelling, the accurate determination of failure onset continues to be a challenge. In this article, the complex phase (CP) steel CP800 is characterised for its failure characteristics using tensile tests with butterfly specimens. The material failure was determined by three evaluation methods: mechanically by a sudden drop in the forming force, optically by a crack appearing on the specimen surface, and acoustically by burst signals. As to be expected, the mechanical evaluation method determined material failure the latest, while the optical and acoustical methods showed similar values. Numerical models of the butterfly tests were created using boundary conditions determined by each evaluation method. A comparison of the experiments, regarding the forming force and the distribution of the equivalent plastic strain, showed sufficient agreement. Based on the numerical models, the characteristic stress states of each test were evaluated, which showed similar values for the mechanical and optical evaluation method. The characteristic stress states derived from the acoustical evaluation method were shifted to higher triaxialities, compared to the other methods. Matching the point in time of material failure, the equivalent plastic strain at failure was highest for the mechanical evaluation method, with lower values for the other two methods. Furter, three Johnson–Cook (JC) failure models were parametrised and subsequently compared. The major difference was in the slope of the failure models, of which the optical evaluation method showed the lowest slope. The reasons for the differences are the different stress states and the different equivalent plastic strains due to different evaluation areas.

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Section: Introductionmentioning

confidence: 99%

Failure Modelling of CP800 Using Acoustic Emission Analysis

2023

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Research on the Mechanical Properties of Single-Lap Rivet-Bonded Hybrid Joint Considering the Rivet Forming Process

Han,

Ren,

et al. 2024

Exp Mech

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Hydrogen susceptibility of Al 5083 under ultra-high strain rate ballistic loading

Baltacioglu,

Mozafari,

Aydin

et al. 2024

Materials Testing

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The effect of hydrogen on the ballistic performance of aluminum (Al) 5083H131 was examined both experimentally and numerically in this study. Ballistics tests were conducted at a 30° obliquity in accordance with the ballistic test standard MIL-DTL-46027 K. The strike velocities of projectiles were ranged from 240 m s−1 to 500 m s−1 level in the room temperature. Electrochemical hydrogen charging method was utilized to introduce hydrogen into material. Chemical composition of material was analyzed using energy dispersive X-ray (EDX) analysis. Instant camera pictures were captured using high-speed camera to compare H-uncharged and H-charged specimen ballistics tests. The volume loss in partially penetrated specimens were assessed using the 3D laser scanning method. Microstructural examinations were conducted utilizing scanning electron microscopy (SEM). It was observed that with the increased deformation rate, the dominance of the HEDE mechanism over HELP became evident. Furthermore, the experimental findings were corroborated through numerical methods employing finite element analysis (FEM) along with the Johnson–Cook plasticity model and failure criteria. Inverse optimization technique was employed to implement and fine-tune the Johnson–Cook parameters for H-charged conditions. Upon comparing the experimental and numerical outcomes, a high degree of consistency was observed, indicating the effective performance of the model.

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Study on the Fracture Behaviour of 6061 Aluminum Alloy Extruded Tube during Different Stress Conditions

Cited by 3 publications

References 16 publications

Failure Modelling of CP800 Using Acoustic Emission Analysis

Failure Modelling of CP800 Using Acoustic Emission Analysis

Research on the Mechanical Properties of Single-Lap Rivet-Bonded Hybrid Joint Considering the Rivet Forming Process

Hydrogen susceptibility of Al 5083 under ultra-high strain rate ballistic loading

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