The influence of internal structure on wave propagation in elastic beams under impact loading

Abstract
The paper is devoted to the problem of wave propagation in materials with complicated internal structure. Different types of inclusions were taken into account. Semi-analytical procedure that is based on Laplace transform method is used. In the case of two thin massive inclusions the problem was solved analytically and influence of masses and position of inclusions was investigated numerically in some particular cases. The same method was used in the problem of wave propagation in the beam with visco-elastic inclusion of finite length and intiuence of the characteristics of the inclusion was analyzed. It was shown that one could control the process by varying parameters of the model. The merit of the approach is that it is applicable for different types of internal structure of material without grate changes. Thus the method proposed in the paper is effective for the investigation of wave propagation in materials with inhomogeneous internal structure and can be used in many engineering problem.