颗粒复合材料中波传播的细观力学分析
Micromechanical approach for the analysis of wave propagation in particulate composites
摘要：
激光超声无损检测广泛应用于机械结构的检测。该方法利用超声导波（UGW）在介质中的传播。为此目的，已经证明，在激光源和用于检查的结构之间添加薄复合层是必要的。因此，该复合材料是由用于夹杂物的吸收材料（例如碳）和用于基质的膨胀材料（例如弹性体）组成的光声换能器。因此，这种复合材料的最佳制造应该能够放大用于检查的信号。事实上，实验研究已经证明，碳夹杂物的体积分数、它们的形状和基质的性质的变化直接影响信号的放大。本研究的目的是分析波在颗粒粘弹性复合材料中的传播的动态自洽方法。
英文摘要：
Laser ultrasonic non-destructive testing is widely used for the inspection of mechanical structures. This method uses the propagation of ultrasonic guided waves (UGW) in the media. For this purpose, it has been demonstrated that the addition of a thin composite layer between the laser source and the structure for inspection is necessary. Consequently, this composite is an optoacoustic transducer composed of an absorption material such as carbon for inclusions and an expanding material such as an elastomer for the matrix. Thus, optimal fabrication of this composite should enable the amplification of the signal for inspection. Indeed, experimental research has demonstrated that variation in the volume fraction of carbon inclusions, their shape, and the nature of the matrix, affect the amplification of the signal directly. The aim of this study is to analyse the wave propagation in particulate viscoelastic composites by a dynamic self-consistent approach.
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