吉林大学学报(工学版) ›› 2016, Vol. 46 ›› Issue (4): 1149-1155.doi: 10.13229/j.cnki.jdxbgxb201604021

• Orginal Article • Previous Articles     Next Articles

Modeling method of bolted joint interface based on gradient virtual materials

LIAO Jing-ping1, 2, ZHANG Jian-fu1, 2, YU Ding-wen1, 2, FENG Ping-fa1, 2   

  1. 1.Department of Mechanical Engineering, Tsinghua University, Beijing 100084,China;
    2.Beijing Key Laboratory of Precision/Ultra-precision Manufacturing Equipments and Control, Tsinghua University,Beijing 100084,China
  • Received:2015-03-06 Online:2016-07-20 Published:2016-07-20

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Abstract: To improve the modeling precision of bolted joints, a new modeling method based on gradient virtual materials was proposed. First, the contact pressure distribution on bolted joint interface was obtained through interpolating and revising the contact interface force. Then, the analytical expressions of the elastic modulus and shear modulus were derived for gradient virtual material according to Hooke Law. By using a layering method, the analytical formulas of the gradient virtual material was inserted into finite element software to construct the interface model. Qualitative comparison of similar mode and quantitative comparison of corresponding natural frequency were carried out between the simulation and experimental results. It is shown that the first six order vibration shapes of the gradient virtual material models are consistent with experimental results. The modeling precision of the gradient virtual material model is much better than that of traditional virtual material model.

Key words: mechanics, bolted joint, contact pressure distribution, gradient virtual material, modal analysis

CLC Number: 

  • TH113.1
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