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Steel and Composite Structures
  Volume 31, Number 3, May10 2019, pages 233-242

Inhomogeneous bonding state modeling for vibration analysis of explosive clad pipe
Jianbin Cao, Zhousuo Zhang, Yanfei Guo and Teng Gong

    Early detection of damage bonding state such as insufficient bonding strength and interface partial contact defect for the explosive clad pipe is crucial in order to avoid sudden failure and even catastrophic accidents. A generalized and efficient model of the explosive clad pipe can reveal the relationship between bonding state and vibration characteristics, and provide foundations and priory knowledge for bonding state detection by signal processing technique. In this paper, the slender explosive clad pipe is regarded as two parallel elastic beams continuously joined by an elastic layer, and the elastic layer is capable to describe the non-uniform bonding state. By taking the characteristic beam modal functions as the admissible functions, the Rayleigh-Ritz method is employed to derive the dynamic model which enables one to consider inhomogeneous system and any boundary conditions. Then, the proposed model is validated by both numerical results and experiment. Parametric studies are carried out to investigate the effects of bonding strength and the length of partial contact defect on the natural frequency and forced response of the explosive clad pipe. A potential method for identifying the bonding quality of the explosive clad pipe is also discussed in this paper.
Key Words
    explosive clad pipe; bonding strength; partial contact defect; Rayleigh-Ritz method
(1) School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, P.R. China;
(2) State Key Laboratory for Manufacturing and Systems Engineering, Xi'an Jiaotong University, Xi'an 710049, P.R. China.

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