Modeling vibration behavior of delaminated composite laminates using meshfree method in Hamilton system

doi:10.1007/s10483-015-1933-7

摘要/Abstract

摘要： Free vibration analysis of composite laminates with delaminations is performed based on a three-dimensional semi-analytical model established by introducing the local radial point interpolation method (LRPIM) into a Hamilton system. The governing equation is derived with a transfer matrix technique and a spring layer model based on a local weak-form equivalent to the modified Hellinger-Reissner variational principle. Main superiority of the present model is that the scale of the governing equation involves only the so-called state variables at the top and bottom surfaces, and is insensitive to the thickness and the layer number of the composite laminates. Several numerical examples for analyzing the vibration frequencies and mode shapes of delaminated composite beams and plates are given to validate the model. The results are in good agreement with the pre-existing results.

关键词: vibration, composite laminate, delamination, local radial point interpolation method (LRPIM)

Abstract: Free vibration analysis of composite laminates with delaminations is performed based on a three-dimensional semi-analytical model established by introducing the local radial point interpolation method (LRPIM) into a Hamilton system. The governing equation is derived with a transfer matrix technique and a spring layer model based on a local weak-form equivalent to the modified Hellinger-Reissner variational principle. Main superiority of the present model is that the scale of the governing equation involves only the so-called state variables at the top and bottom surfaces, and is insensitive to the thickness and the layer number of the composite laminates. Several numerical examples for analyzing the vibration frequencies and mode shapes of delaminated composite beams and plates are given to validate the model. The results are in good agreement with the pre-existing results.

Key words: delamination, vibration, composite laminate, local radial point interpolation method (LRPIM)

中图分类号:

O343

Jie CHEN, Hai WANG, Guanghui QING. Modeling vibration behavior of delaminated composite laminates using meshfree method in Hamilton system[J]. Applied Mathematics and Mechanics (English Edition), 2015, 36(5): 633-654.

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