Diagnostic tool for structural health monitoring: effect of material nonlinearity and vibro-impact process

International Symposium on Dynamic Deformation and Fracture of Advanced Materials 2013

物理学;材料科学

Hiwarkar, V.R.^1 ; Babitsky, V.I.^2 ; Silberschmidt, V.V.^2

Mechanical, Materials and Manufacturing Engineering, University of Nottingham, Nottingham, NG7 2RD, United Kingdom^1

Wolfson School of Mechanical and Manufacturing Engineering, Loughborough University, Leicestershire, LE11 3TU, United Kingdom^2

关键词: Crack tip plasticity;    Diagnostic tools;    Finite element simulations;    Higher harmonics;    Interaction of cracks;    Material non-linearity;    Structural health;    Vibro-impact;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/451/1/012027/pdf
DOI  :  10.1088/1742-6596/451/1/012027

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Numerous techniques are available for monitoring structural health. Most of these techniques are expensive and time-consuming. In this paper, vibration-based techniques are explored together with their use as diagnostic tools for structural health monitoring. Finite-element simulations are used to study the effect of material nonlinearity on dynamics of a cracked bar. Additionally, several experiments are performed to study the effect of vibro-impact behavior of crack on its dynamics. It was observed that a change in the natural frequency of the cracked bar due to crack-tip plasticity and vibro-impact behavior linked to interaction of crack faces, obtained from experiments, led to generation of higher harmonics; this can be used as a diagnostic tool for structural health monitoring.