Simulation of crack propagation and mechanical properties prediction of graphene-carbon nanotubes/WC ceramic tool materials
ZHAO Wenlong1, SUN Jialin2, HUANG Zhifu1, ZHAO Le3, LI Xiao3
1. State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China; 2. School of Mechanical, Electrical and Information Engineering, Shandong University (Weihai), Weihai 264209, China; 3. Weihai Weiying Tool Co., Ltd., Weihai 264210, China
Abstract：The rapid development of computer simulation technology provides theoretical and technical support for the performance prediction and high-throughput preparation of ceramic tool materials. In this paper, a parametric model and mechanical property prediction model of WC ceramic tool materials containing graphene (G) and carbon nanotube (CNT) were constructed based on Python software. The influence of G-CNT on the microstructure and crack propagation behavior of tool materials was mainly studied. The results show that the three-dimensional G-CNT spatial structure can further improve the properties of WC ceramics compared with single G. When the mass fraction of G-CNT is 0.4%, the tool material has the best comprehensive mechanical properties. The strengthening and toughening mechanism mainly include the super-mixed distribution of G-CNT strong and weak interfaces, material fracture mode transformation, crack deflection, etc.
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2023, Vol. 28 
