Abstract
The central detector at the Jiangmen Underground Neutrino Observatory (JUNO) is a hybrid structure system consisting of an inner acrylic sphere and an outer stainless steel reticulated shell. The stress distributions of the acrylic joints must be accurately simulated to avoid “crazing”. To balance the accuracy and efficiency of the stress analysis, a multi-scale modeling method using mixed-dimensional coupling is proposed. A framework and a generalized procedure are developed to instruct the modeling and analysis. A multi-scale model consisting of a single refined acrylic joint and equipped with simplified joints is proposed and discussed. A comparison of the results using the multi-scale model with a cluster of 3 × 3 refined joints reveals that the difference is less than 5%, while the ratio of the computation resource cost and the time consumption is approximately only 1/7 and 1/5, respectively. The stress distributions of the acrylic joints in the central detector are obtained using the proposed multi-scale model.
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Acknowledgements
This work is supported by the National Key Research and Development Program of China (Grant No. 2016YFC0800200) and the National Natural Science Foundation of China (Grant No. 51578494).
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Zheng, Y., Luo, Y., Xu, X. et al. Multi-scale Modeling for the Stress Analysis of Acrylic Joints in a Hybrid Structure. Int J Steel Struct 19, 1134–1145 (2019). https://doi.org/10.1007/s13296-018-0193-9
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DOI: https://doi.org/10.1007/s13296-018-0193-9