Research on Non-destructive Testing Technology for Bolt Deformation based on Stress Wave Method

Jie Zhang; Hu Li

doi:10.54097/33h3ba87

Authors

Jie Zhang
Hu Li

DOI:

https://doi.org/10.54097/33h3ba87

Keywords:

Stress-wave Nondestructive Testing, Bolt Stretching, Energy Attenuation Ratio

Abstract

In response to the difficulty that bolts are prone to large deformation failure in support and cannot be accurately detected for defects, a comprehensive approach is employed, integrating laboratory experiments, numerical simulation, and experimental validation to study the non-destructive testing method of bolt deformation. The research results demonstrate that: (1) The propagation characteristics of stress waves at varying stages of bolt stretching are elucidated, and it is proposed that the energy decay ratio be employed to quantify the extent of stress wave energy decay at distinct stages of bolt stretching. It is observed that the degree of stress wave energy decay escalates with the degree of stretching. (2) The visualization results of the numerical simulation demonstrate the propagation process of the stress wave at varying stages of bolt stretching with greater clarity, thereby corroborating the stress wave energy decay law at distinct stages of bolt stretching. (3) A non-destructive testing method for bolt deformation is proposed, and the evaluation criteria for non-destructive testing of bolt deformation state are given.

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