Abstract
In this paper, the composite, laminates subjected to pure bending are modelled by using 3-D anisotropic finite elements and the distributions of stress and strain along the thickness are presented. The numerical results show that there is a stress concentration near the bonding interface in the central region (far from traction boundaries and free edges) of symmetric angle-ply laminates, which should be called “interlaminar effect”. The abrupt change of the mechanical behavior of material on the interfaces causes interlaminar stresses. The laminates are in 3-D stress state near the interfaces. The strain distribution of the 3-D numerical model is different from the strain hypothesis of the classical laminate theory based on the Kirchhoff-Love hypotheses of straight inextensional normals.
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References
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Tsai, S. W. and H. T. Hahn,Introduction to Composite Materials, Technomic Publishing Co. Inc., (1980).
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Wei-zang, C., Qian, H. & Wei, F. 3-D numerical study on the bending of symmetric composite laminates. Appl Math Mech 15, 1–6 (1994). https://doi.org/10.1007/BF02451021
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DOI: https://doi.org/10.1007/BF02451021