Early Compressive Deformation of Closed-Cell Aluminum Foam Based on a Three-Dimensional Realistic Structure
Abstract
:1. Introduction
2. Materials and Methods
2.1. Specimens Preparation
2.2. Synchrotron Radiation X-ray Tomography
2.3. Real 3D Model Reconstruction
2.4. Simulation of Compression
2.5. Compression Experiment
3. Results and Discussion
3.1. Simulation Results and Initial Deformation Behavior
3.1.1. Initiation of Plastic Strain in the Simulation Results
3.1.2. Propagation of the Plastic Strain Band in Simulation Results
3.1.3. Formation of the Collapse Band in Simulation Results
3.2. Comparison of the Compression Test Results between Simulation and Experiment
4. Conclusions
- The whole process of obtaining the finite-element model based on the real 3D structure was discussed using the synchrotron radiation X-ray tomography and 3D model reconstruction.
- Different strain levels (0.2%, 2.8%, and 6%) were chosen to discuss the evolution of plastic strain in early compressive deformation. The curvature, anisotropy, and distribution of the volume around cells were found to be important for the initiation of the plastic strain at the lower overall strain level (0.2%). Furthermore, the plastic strain band propagated along the direction aligned 45° with respect to the loading direction, and the width of the plastic strain band increased gradually till the formation of the collapse band in the other two strain levels (2.8% and 6%, corresponding to the levels of propagation of the plastic strain band and formation of the collapse band).
- The numerical and experimental results matched well. Meanwhile, three different strain levels were further demonstrated to exist in the early compressive deformation stage in the stress–strain curves, establishing a correlation between the evolution of the plastic strain among the cells and their global compressive deformation behavior.
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Wan, X.; Zhu, K.; Xu, Y.; Han, B.; Jing, T. Early Compressive Deformation of Closed-Cell Aluminum Foam Based on a Three-Dimensional Realistic Structure. Materials 2019, 12, 1792. https://doi.org/10.3390/ma12111792
Wan X, Zhu K, Xu Y, Han B, Jing T. Early Compressive Deformation of Closed-Cell Aluminum Foam Based on a Three-Dimensional Realistic Structure. Materials. 2019; 12(11):1792. https://doi.org/10.3390/ma12111792
Chicago/Turabian StyleWan, Xiong, Kai Zhu, Yanjin Xu, Baoshuai Han, and Tao Jing. 2019. "Early Compressive Deformation of Closed-Cell Aluminum Foam Based on a Three-Dimensional Realistic Structure" Materials 12, no. 11: 1792. https://doi.org/10.3390/ma12111792