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Analysis of Deformation Damage and Fracture of 7050 Aluminum Alloy During Double Shear Based on Experiment and Simulation

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Abstract

Based on the finite element simulation and experimental analysis, this paper mainly studies the deformation damage and fracture of 7050-H112 aluminum alloy during double shear based on the elastic strain energy density. The analyses of deformation damage and fracture for ends-free and ends-constrained specimens in complex stress and strain states have been carried out. The different stress and strain states which are characterized by stress triaxiality and strain Lode parameter have important effects on damage and fracture according to the simulation and experimental results. The final fracture is mainly caused by tensile stress both for specimens with ends free and ends constraint. Meanwhile, the shear planes are mainly in a state of shear strain when fracture occurs according to the analysis of stress triaxiality and strain Lode parameter. Three characteristic areas (radiation area, fiber area and shear lips) are observed from fracture morphology and account for different proportions on fracture surface for ends-free and ends-constrained specimens. The simulated results on the damage evolution and fracture from finite element method (FEM) are in good agreement with the experimental ones. Besides, there are competitive relations between ductile fracture and brittle fracture during the process of fracture in this paper.

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Acknowledgments

The authors are very grateful for the support received from the National Natural Science Foundation of China (Grant No. 51275414), the Aeronautical Science Foundation of China (Grant No. 2011ZE53059), the Research Fund of the State Key Laboratory of Solidification Processing (NWPU) of China (Grant No. 130-QP-2015) and the Graduate Starting Seed Fund of Northwestern Polytechnical University (No. Z2016009).

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  1. State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an, 710072, China

    Han Chen, Fuguo Li, Jun Cao, Jinghui Li, Qianru Wang & Weina Li

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  1. Han Chen
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  2. Fuguo Li
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  3. Jun Cao
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  4. Jinghui Li
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Correspondence to Fuguo Li.

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Chen, H., Li, F., Cao, J. et al. Analysis of Deformation Damage and Fracture of 7050 Aluminum Alloy During Double Shear Based on Experiment and Simulation. J. of Materi Eng and Perform 26, 1158–1173 (2017). https://doi.org/10.1007/s11665-017-2545-6

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  • DOI: https://doi.org/10.1007/s11665-017-2545-6

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