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Parametric Study of Rectangular Coil for Eddy Current Testing of Lamination
Pengfei Wang,Zhiwei Zeng 한국비파괴검사학회 2016 한국비파괴검사학회지 Vol.36 No.2
Eddy current testing (ECT) is an important nondestructive testing technology for the inspection of flaws in conductive materials. However, this widely used technology is not suitable for inspecting lamination when a conventional pancake coil is used because the eddy current (EC) generated by the pancake coil is parallel to the lamination and will not be perturbed. A new method using a rectangular coil placed vertical to the work piece is proposed for lamination detection. The vertical sections of the rectangular coil induce ECs that are vertical to the lamination and can be perturbed by the lamination. A parametric study of a rectangular coil by finite element analysis was performed in order to examine the capability of generating vertical EC.
Parametric Study of Rectangular Coil for Eddy Current Testing of Lamination
Wang, Pengfei,Zeng, Zhiwei The Korean Society for Nondestructive Testing 2016 한국비파괴검사학회지 Vol.36 No.2
Eddy current testing (ECT) is an important nondestructive testing technology for the inspection of flaws in conductive materials. However, this widely used technology is not suitable for inspecting lamination when a conventional pancake coil is used because the eddy current (EC) generated by the pancake coil is parallel to the lamination and will not be perturbed. A new method using a rectangular coil placed vertical to the work piece is proposed for lamination detection. The vertical sections of the rectangular coil induce ECs that are vertical to the lamination and can be perturbed by the lamination. A parametric study of a rectangular coil by finite element analysis was performed in order to examine the capability of generating vertical EC.
Design and aerodynamic characteristic analysis of unfolding-bending bionic flapping-wing aircraft
Weiping Shao,Hui Zhang,Pengfei Zeng 대한기계학회 2022 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.36 No.6
A bionic flapping-wing aircraft model is designed in this study to achieve unfolding-bending effect of a bird’s wings during flight, realize active unfolding-bending movement, and demonstrate rapid return characteristic of flapping-bending motion. We use the new method of ADAMS and XFlow cosimulation to analyze its aerodynamic characteristics and investigate effects of flutter frequency, air flow velocity, fuselage angle of attack, and aileron torsion angle on its aerodynamic characteristics. Results showed that increasing the flapping frequency can significantly improve aerodynamic characteristics, increasing the air flow velocity will reduce aerodynamic characteristics, decreasing the fuselage angle of attack will reduce peak lift and increase peak thrust, and increasing the aileron torsion angle will reduce the rising resistance and increase forward thrust. The analysis results showed the excellent aerodynamic characteristics of the model.