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Volume 34 Issue 4
Jul 2020
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Chinese Journal of High Pressure Physics  > 2020  >  34(4): 044201.
TANG Ruitao, XU Liuyun, WEN Heming, WANG Zihao. A Macroscopic Dynamic Constitutive Model for Ceramic Materials[J]. Chinese Journal of High Pressure Physics, 2020, 34(4): 044201. doi: 10.11858/gywlxb.20190863
Citation: TANG Ruitao, XU Liuyun, WEN Heming, WANG Zihao. A Macroscopic Dynamic Constitutive Model for Ceramic Materials[J]. Chinese Journal of High Pressure Physics, 2020, 34(4): 044201. doi: 10.11858/gywlxb.20190863
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A Macroscopic Dynamic Constitutive Model for Ceramic Materials

doi: 10.11858/gywlxb.20190863

  • CAS Key Laboratory for Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei 230027, Anhui, China

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  • Author Bio:

    TANG Ruitao (1989－), male, doctoral student, major in impact dynamics. E-mail: rttang@mail.ustc.edu.cn

  • Corresponding author: WEN Heming (1965－), male, Ph.D, professor, major in impact dynamics. E-mail: hmwen@ustc.edu.cn
  • Received Date: 06 Dec 2019
  • Rev Recd Date: 06 Jan 2020
    Abstract
  • A macroscopic constitutive model is presented herein for ceramic materials subjected to dynamic loadings by closely following a previous study on concrete. The equation of state is described by a polynomial equation and the strength model takes into account various effects such as pressure hardening, Lode angle, strain rate, shear damage and tensile softening. In particular, the strength surface of ceramic materials is characterized by a new function which levels out at very high pressures and strain rate effect is taken into account by dynamic increase factor (DIF) which excludes inertial effect. The present model is verified against some available experimental data for ceramic materials in terms of pressure-volumetric response, quasi-static strength surface and strain rate effect. The model is further verified against the data for triaxial test by single element simulation approach and the test data for depth of penetration in AD99.5/RHA struck by tungsten alloy penetrators. Furthermore, comparisons are also made between numerical results of the present model and the JH-2 model. It is demonstrated that the present model can be employed to describe the mechanical behavior of ceramic materials under different loading conditions with reasonable confidence and is advantageous over the existing model.

     

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