Mr. Tairan Wang Profile

Tairan Wang

at Beijing Institute of Structure and Environment Engineering

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Publications (3)

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Proceedings Article | 12 March 2021 Paper

The study of the non-linear dynamic response for circular plate subjected underwater impulsive loading

Han Liu, Hao Chen, Penshuo Liu, Jingyu Zhang, Tairan Wang

Proceedings Volume 11763, 117635F (2021) https://doi.org/10.1117/12.2587240

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In this paper, the non-linear dynamic response of circular air-backed panel subjected to underwater impulsive loading has been studied in the fluid-structure interaction (FSI) experiments. This is helpful for the design and improvement of thin plate structures in practical engineering field. Three typical copper plates, (a) clamped, and (b) bolted were selected, fixed on the end of the anvil tube by the flange ring cover. A high-speed photography system recorded the full-field shape and displacement profiles of the specimens in real time. The pressure history of the underwater impulsive wave was measured by a pair of dynamic pressure transducers. The 3D transient deformation fields’ measurements were obtained using a 3D digital image correlation (DIC) technique. Strain results from DIC and the strain gauges technique were in good agreement. The results also show a high level of correlation with that results simulated by AUTODYN. The 3D-DIC is proven to be an effective method to measure 3D full-field dynamic response of structures under underwater impact loading. Moreover, this work will be helpful on understanding the failure process and predicting the modes.

Proceedings Article | 12 March 2021 Paper

Test and analysis of axial compression stability of composite thin-walled reinforced structures

Jiangfan Zhou, Liangyong Chen, Lu Bai, Tairan Wang, Wenjing Guo, Zhanwei Liu

Proceedings Volume 11763, 117634S (2021) https://doi.org/10.1117/12.2587053

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In this paper, a large-scale composite thin-walled stiffened structure is subjected to an axial compression stability test. The stability of the structure is tested and analyzed using resistance strain gauges, digital speckle correlation and finite element methods. The analysis results were analyzed from four aspects: instability load, load strain result, load displacement result and test calculation result comparison. In this paper, the initial buckling load, load-strain bifurcation curve, buckling wave distribution characteristics of the composite thin-walled stiffened curved plate under two radius parameters, the comparison of the test deformation results and the calculation analysis results, etc. are obtained for research. The research on the stability of large-scale composite thin-walled reinforced structures provides new ideas and methods.

Proceedings Article | 17 April 2020 Paper

Study on mechanical properties of welded structures in ultra-low temperature environment based on DIC

Jiangfan Zhou, Yunquan Su, Guoliang Xu, Xiaolei Ba, Tairan Wang, Zhanwei Liu

Proceedings Volume 11455, 114552K (2020) https://doi.org/10.1117/12.2563876

KEYWORDS: Metals, Digital image correlation, Analytical research, Aluminum, Cryogenics, Rockets, Optical testing, Liquids, Nitrogen, Heat treatments

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In order to reveal the failure mechanism of the weld structure of the new generation launch vehicle in ultralow temperature environment and to provide scientific basis for improving the welding quality and the carrying capacity of the tank, in this project, this paper studied full-field mechanical parameters inversion and failure mechanism of non uniform joints at ultralow temperature environment. Firstly, the test method of ultralow temperature mechanical properties of aluminum alloy welded specimens based on DIC is described, and an open system for simulating the ultralow temperature environment was established. Secondly, two specimens based on the welding and friction stir welding were studied. In this paper, the relationship between load and stress strain curve, strain distribution along the direction of the load and the strain concentration factor of the welded specimen were analyzed. Results show that the friction stir welding specimen was better than the fusion welding specimen in mechanical properties. Finally, this paper also compared the influence of test area effect on, and it show that the measurement error was not more than 8.8% when heat affected zone size was between 2～8mm. The three tensile specimens were all broken in the gauge length and the fracture location was consistent. There was obvious plastic deformation near the fracture. The microstructure was observed. The tensile specimens were all broken in the gauge length and the fracture location was consistent. There was obvious plastic deformation near the fracture. The microscopic morphology observation showed that the whole section showed shear dimple morphology, and no material defects were observed. The fracture mode of the tensile fracture is plastic fracture.This project would provide a scientific basis for the welding process optimization and improvement of the ultra temperature tank of the new generation launch vehicle in China.

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