Fiber Reinforced Plastics/Composites ›› 2019, Vol. 0 ›› Issue (9): 110-118.

• REVIEW • Previous Articles     Next Articles

THE RESEARCH PROGRESS OF DYNAMIC CHARACTERISTICS OF THE COMPOSITE SANDWICH STRUCTURE

YANG Kun, ZHANG Wei, DU Du   

  1. PLA 92578 Force, Beijing 100161, China
  • Received:2018-10-18 Online:2019-09-28 Published:2019-09-28

Abstract: The composite sandwich structure is composed of upper and lower layer fiber reinforced composite and core layer, which has advantages of high specific strength, good damping property, design of fiber layer and light quality. It is often used as an vibration reducing structure. The study of its dynamic characteristics is instructive for its design. In this paper, the research achievements of dynamic characteristics of composite sandwich structure at home and abroad are reviewed, which include the mechanical analysis model of sandwich structure, core viscoelastic material constitutive model, the analysis method of the viscoelastic sandwich structure dynamic characteristic, viscoelastic composite sandwich beam and plate, discrete core composite sandwich structure. The calculation method of the dynamic characteristics of different structure and these limitations are summarized, and the breakthroughs and difficulties of different types of sandwich structure theory or numerical calculation are pointed out. Finally, the trend of future research on the dynamic characteristics of composite sandwich structures is also pointed out. It is concluded that, in the past, the structure damping properties prediction followed the course of gradually approaching the viscoelastic properties of materials, from regardless of frequency to frequency. The research object has the trend from the regular object to the large complex structure. In future, in terms of theoretical solution, the dynamic response closed solution of the sandwich beam and plate needs in-depth study. In terms of the dynamic response, the dynamic characteristics of the free paving layer surface structure need to be studied with the strip transfer function method. In application research, in order to reduce the scale and difficulty of calculation, a material constitutive model that can approximate the mechanical behavior and adapt to numerical solutions must be seeked, and accordingly improve the numerical solutions, will become a research hotspot.

Key words: composite, sandwich structure, dynamic characteristics, research progress

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