Analysis of Elastic Pulse Dispersion in Periodically Layered Composite Rods using Wave Finite Element Method

被引：3
作者：
Khaji, Naser [1 ]
Mirzajani, Mohsen [2 ]
Hori, Muneo [3 ]
机构：
[1] Hiroshima Univ, Grad Sch Adv Sci & Engn, Dept Civil & Environm Engn, 1-4-1 Kagamiyama, Hiroshima 7398527, Japan
[2] Univ Tabriz, Marand Tech Fac, Dept Civil Engn, POB 54138-89741, Tabriz, Iran
[3] Japan Agcy Marine Earth Sci & Technol, Res Inst Value Added Informat Generat, Yokohama, Kanagawa, Japan
来源：
INTERNATIONAL JOURNAL OF APPLIED MECHANICS | 2021年 / 13卷 / 05期
基金：
日本学术振兴会;
关键词：
Heterogeneous solids; periodic media; stress wave propagation; wave dispersion; wave finite element method; strong discontinuities; PROPAGATION; MEDIA; HOMOGENIZATION; INTEGRATION; REDUCTION; MODEL;
D O I：
10.1142/S1758825121500502
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
Numerical analysis of wave propagation in composite structures needs large-scale computation which is not feasible in practice. This paper investigates the possibility of applying a wave finite element method (WFEM) to composite structure. The key feature of the WFEM is its capability of accurately analyzing the discontinuities in stress wavefront along with the discontinuities in velocities and strains. In addition, the numerical analysis of the WFEM is unconditionally stable and reduces numerical computation. This paper studies a periodically layered composite rod to analyze the dispersion and propagation of stress waves using the WFEM. The numerical results are compared with other numerical/analytical solutions, paying attention to the accuracy of computing the strong discontinuities in the stress wavefront as well as the dispersion of pulses in a heterogeneous elastic rod. It is shown that the WFEM can be used as an affordable tool for numerically solving wave propagation in composite structures.
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页数：25
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