Prediction of Inhomogeneous Stress in Metal Structures: A Hybrid Approach Combining Eddy Current Technique and Finite Element Method
Autor: | Cristian Ulianov, Gui Yun Tian, Yating Yu, Hanchao Li, Fei Yuan |
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Rok vydání: | 2021 |
Předmět: |
Materials science
Article Subject Surface stress 02 engineering and technology Mechanics 021001 nanoscience & nanotechnology Residual 01 natural sciences Piezoresistive effect Finite element method law.invention Stress (mechanics) Control and Systems Engineering Residual stress law 0103 physical sciences Eddy current T1-995 Skin effect Electrical and Electronic Engineering 0210 nano-technology 010301 acoustics Instrumentation Technology (General) |
Zdroj: | Journal of Sensors, Vol 2021 (2021) |
ISSN: | 1687-7268 1687-725X |
Popis: | Concentrated stresses and residual ones are critical for the metal structures’ health, because they can cause microcracks that require emergency maintenance or can result in potential accidents. Therefore, an accurate approach to the measurement of stresses is key for ensuring the health of metal structures. The eddy current technique is an effective approach to detect the stress according to the piezoresistive effect. However, it is limited to detect the surface stress due to the skin effect. In engineering, the stress distribution is inhomogeneous; therefore, to predict the inhomogeneous stress distribution, this paper proposes a nondestructive approach which combines the eddy current technique and finite element (FE) method. The experimental data achieved through the eddy current technique determines the relationship between the applied force and the magnetic flux density, while numerical simulations through the FE method bridge the relationship between the magnetic flux density and the stress distribution in different directions. Therefore, we can predict the inhomogeneous stress nondestructively. As a case study, the applied stress in a three-point-bending simply supported beam was evaluated, and the relative error is less than 8% in the whole beam. This approach can be expected to predict the residual stress in metal structures, such as rail and vehicle structures, if the stress distribution pattern is known. |
Databáze: | OpenAIRE |
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