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Volume 37 Issue 4
Sep 2023
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Chinese Journal of High Pressure Physics  > 2023  >  37(4): 044201.
XIU Chengdong, WANG Changfeng, LI Bing, GUAN Renguo. Numerical Simulation Study on the Influence of Hard Phase Shape on the Fracture Behavior of Ti-Al3Ti Bionic Composites[J]. Chinese Journal of High Pressure Physics, 2023, 37(4): 044201. doi: 10.11858/gywlxb.20230629
Citation: XIU Chengdong, WANG Changfeng, LI Bing, GUAN Renguo. Numerical Simulation Study on the Influence of Hard Phase Shape on the Fracture Behavior of Ti-Al3Ti Bionic Composites[J]. Chinese Journal of High Pressure Physics, 2023, 37(4): 044201. doi: 10.11858/gywlxb.20230629
shu

Numerical Simulation Study on the Influence of Hard Phase Shape on the Fracture Behavior of Ti-Al3Ti Bionic Composites

doi: 10.11858/gywlxb.20230629
  • 1.

    Continuous Extrusion Engineering Research Center of the Ministry of Education, Dalian Jiaotong University, Dalian 116028, Liaoning, China

  • 2.

    Liaoning Key Laboratory of Near Net Forming, Dalian 116028, Liaoning, China

  • Received Date: 27 Mar 2023
  • Rev Recd Date: 25 Apr 2023
    • Available Online: 07 Jul 2023
  • Issue Publish Date: 01 Sep 2023
    Abstract
  • Al3Ti is characterized by low density and high hardness, however, due to its brittleness, it is prone to fracture under smaller deformation. To improve the application range of Al3Ti, inspired by biological structures, a biomimetic finite element model was established based on the geometry of shell pearl layer, conch shell and fish scale, and the influences of hard phase shape, as well as impact velocity, were investigated to analyze the fracture resistance mechanism of bionic composites in terms of fracture behavior, crack propagation process and energy absorption effect. A shape coefficient was defined to optimize the structure design. The results show that the shape of the hard phase has a significant effect on the fracture behavior of the bioinspired pearl-like layer specimens under quasi-static condition. The rectangular hard phase can better hinder the crack growth toward the load end, thus improving the load-bearing capacity of the specimen. The specimen with shape factor around 5.0 shows the optimal fracture resistance and energy absorption. Under dynamic impact conditions, the soft phase has increased ability to hinder crack growth, which further improves the fracture resistance and energy absorption effect of the rectangular specimen.

     

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