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Volume 38 Issue 3
Mar.  2012
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Journal of Beijing University of Aeronautics and Astronautics  > 2012  >  (3): 384-388,393.
Liu Yujia, Yan Ying, He Mingze, et al. Simulation of progressive damage on composite structure under hydro/thermo/mechanical coupled condition[J]. Journal of Beijing University of Aeronautics and Astronautics, 2012, (3): 384-388,393. (in Chinese)
Citation: Liu Yujia, Yan Ying, He Mingze, et al. Simulation of progressive damage on composite structure under hydro/thermo/mechanical coupled condition[J]. Journal of Beijing University of Aeronautics and Astronautics, 2012, (3): 384-388,393. (in Chinese)
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Simulation of progressive damage on composite structure under hydro/thermo/mechanical coupled condition

  • School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

  • Received Date: 01 Mar 2011
  • Publish Date: 30 Mar 2012
    Abstract
  • A tracking method of progressive damage on composite structure under the hydro/thermo/mechanical coupled condition was developed. The finite element model was built considering the random distribution of mechanical properties. Constitutive relation of composite material under hygrothermal condition was improved. Taking Hashin criteria and maximum stress criteria as failure criterion, the whole damage process from initial damage to ultimate failure of composite open hole laminates was simulated completely by this method under different hygrothermal conditions and different load types. The errors between ultimate strength prediction results and experimental results are less than 10%, so the effectiveness of this method is verified. The hygrothermal effect on the damage initiation and evolution shows that initial damage appears earlier and the ultimate strength and ultimate strain decreases under hygrothermal condition compared with room temperature dry condition.

     

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