Fiber Reinforced Plastics/Composites ›› 2020, Vol. 0 ›› Issue (1): 120-126.

• REVIEW • Previous Articles    

PROSPECT FOR THE APPLICATION OF THREE-DIMENSIONAL CONSTITUTIVE CHARACTERIZATION TECHNIQUE FOR THICK-SECTION LAMINATED COMPOSITES

CHEN Guang-chang1,2, WANG Ya-na3, CHEN Pu-hui 1   

  1. 1. State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;
    2.China Helicopter Research and Development Institute, Jingdezhen 333000, China;
    3.CAEE Beijing Institute of Aeronautical Materials, Beijing 100095, China
  • Received:2019-03-26 Online:2020-01-28 Published:2020-01-28

Abstract: There is no unified standard test method for the three-dimensional mechanical properties of the thick-section laminated composite materials. Accurate and efficient characterization of the three-dimensional mechanical properties of composite materials, especially the complete stress-strain curve, is critical for understanding the complex deformation and failure mechanisms of composites, especially for the glass-fiber and carbon-fiber reinforced polymer matrix composites which play a critical role in aviation structures. In this paper, the latest progress in characterization of three-dimensional constitutive relations of laminated composites abroad is introduced, and a new method of assessing modulus and strength in three directions and non-linear shear stress-strain curves in three main material planes of composites, which is based on the short beam shear and small rectangular plate torsion specimens and full-field deformation obtained with the digital image correlation method. In addition, the state-of-the-art status of technology in three-dimensional constitutive relationship characterization of thick cross-section laminated composites in China, and caps between the civil and western are summarized as well. The overview shows that the correspondences of stress and strain filed in digital image correlation measurement and the inverse of the material constitutive properties based on the digital image correlation strain measurements are the key techniques needed to break through in order to obtain accurate measurement of three-dimensional mechanical properties of composites.

Key words: thick section, laminate, composite, three-dimensional, constitutive properties, characterization

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