Applied Mathematics and Mechanics (English Edition) ›› 2019, Vol. 40 ›› Issue (12): 1831-1846.doi: https://doi.org/10.1007/s10483-019-2550-7

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Third-order elastic, piezoelectric, and dielectric constants

Yanming ZHANG1,2, Jun JIN1,2, Hongping HU1,2   

  1. 1. Department of Mechanics, Huazhong University of Science and Technology, Wuhan 430074, China;
    2. Hubei Key Laboratory for Engineering Structural Analysis and Safety Assessment, Huazhong University of Science and Technology, Wuhan 430074, China
  • Received:2019-05-04 Revised:2019-08-17 Online:2019-12-03 Published:2019-11-20
  • Contact: Hongping HU E-mail:huhp@hust.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Nos. 11872186 and 11272126) and the Fundamental Research Funds for the Central Universities (No. HUST:2016JCTD114)

Abstract: The definitions of the third-order elastic, piezoelectric, and dielectric constants and the properties of the associated tensors are discussed. Based on the energy conservation and coordinate transformation, the relations among the third-order constants are obtained. Furthermore, the relations among the third-order elastic, piezoelectric, and dielectric constants of the seven crystal systems and isotropic materials are listed in detail. These third-order constants relations play an important role in solving nonlinear problems of elastic and piezoelectric materials. It is further found that all third-order piezoelectric constants are 0 for 15 kinds of point groups, while all third-order dielectric constants are 0 for 16 kinds of point groups as well as isotropic material. The reason is that some of the point groups are centrally symmetric, and the other point groups are high symmetry. These results provide the foundation to measure these constants, to choose material, and to research nonlinear problems. Moreover, these results are helpful not only for the study of nonlinear elastic and piezoelectric problems, but also for the research on flexoelectric effects and size effects.

Key words: third-order elastic constant, third-order piezoelectric constant, nonlinear, third-order dielectric constant, crystal, coordinate transformation, tensor

2010 MSC Number: 

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