Impact behaviors of poly-lactic acid based biocomposite reinforced with unidirectional high-strength magnesium alloy wires |
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| Authors: | Xuan Li Chao Guo Xiaokai Liu Lei Liu Jing Bai Feng Xue Pinghua Lin Chenglin Chu |
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| Affiliation: | School of Materials Science and Engineering and Jiangsu Key Laboratory for Advanced Metallic Materials, Southeast University, Nanjing 211189, China;School of Materials Science and Engineering and Jiangsu Key Laboratory for Advanced Metallic Materials, Southeast University, Nanjing 211190, China;School of Materials Science and Engineering and Jiangsu Key Laboratory for Advanced Metallic Materials, Southeast University, Nanjing 211191, China;School of Materials Science and Engineering and Jiangsu Key Laboratory for Advanced Metallic Materials, Southeast University, Nanjing 211192, China;School of Materials Science and Engineering and Jiangsu Key Laboratory for Advanced Metallic Materials, Southeast University, Nanjing 211193, China;School of Materials Science and Engineering and Jiangsu Key Laboratory for Advanced Metallic Materials, Southeast University, Nanjing 211194, China;School of Materials Science and Engineering and Jiangsu Key Laboratory for Advanced Metallic Materials, Southeast University, Nanjing 211195, China;School of Materials Science and Engineering and Jiangsu Key Laboratory for Advanced Metallic Materials, Southeast University, Nanjing 211196, China |
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| Abstract: | A novel poly-lactic acid (PLA) based biocomposite reinforced with unidirectional high-strength magnesium alloy (Mg-alloy) wires for bonefracture fi xation was fabricated by hot-compressing process. The macroscopical and microscopical impact behaviors of the biocomposite wereinvestigated using impact experiments and finite element method (FEM), respectively. The results indicated that the biocomposite had favorableimpact properties due to the plastic deformation behavior of Mg-alloy wires during impact process. While the content of Mg-alloy wires reached 20 vol%, the impact strength of the composite could achieve 93.4 kJ/m2, which is approximate 16 times larger than that of pure PLA fabricatedby the same process. According to FEM simulation results, the complete destruction life of the composites during impact process increased withincreasing volume fraction of Mg-alloy wires, indicating a high impact-bearing ability of the composite for bone fracture fixation.Simultaneously, the energy absorbed by Mg-alloy wires in the composites had a corresponding increase. In addition, it denoted that the impactproperties of the composites are sensitive to the initial properties of the matrix material. |
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| Keywords: | Impact property Magnesium alloy wire Poly-lactic acid Composite FEM |
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