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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2016, Vol. 37 ›› Issue (2): 588-596.doi: 10.7527/S1000-6893.2015.0262

• Solid Mechanics and Vehicle Conceptual Design • Previous Articles     Next Articles

Multi-level strength analysis approach for hypersonic vehicle

LIANG Heng1, ZENG Jianjiang1, YI Liyi2, TONG Mingbo1   

  1. 1. Ministerial Key Discipline Laboratory of Advanced Design Technology of Aircraft, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;
    2. Zhuzhou Times New Material Technology Co., Ltd., Zhuzhou 412007, China
  • Received:2014-11-04 Revised:2015-09-25 Online:2016-02-15 Published:2015-09-30
  • Supported by:

    A Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions

Abstract:

In order to obtain more accurate result of structural stress damage, sub-model method is used to analyze a hypersonic vehicle structure. According to the complexity of the hypersonic vehicle, the procedure of the sub-model method consists of three steps. Firstly, a coarsely meshed model is used for the whole structure to calculate the displacement of the cut-boundary nodes and force distribution. Secondly, a denser mesh is generated for the secondary sub-model and multi-bolt joints are simulated by Fastener which could help to obtain more accurate structural stress and bolt loads distribution. Thirdly, the three-level sub-model is built at the maximum bolt load area. With the subroutine of progressive damage, damage of the laminate is analyzed. With the application of the sub-model method, Fastener and UMAT(user-defined material mechanical behavior), the strength of the hypersonic vehicle structure, from global to local, is analyzed, which proves that the workload could be reduced significantly and the simulation would be more accurate.

Key words: FEM, sub-model method, progressive damage, hypersonic vehicle, structure strength

CLC Number: