STUDY ON BENDING STIFFNESS OF HOLLOW INTEGRATED SANDWICH COMPOSITES

Abstract

Abstract: Based on the structure characteristics of the hollow integrated sandwich composites and the analysis of warp and weft bending deformation, two kinds of sandwich beam models were established and the analytical expressions of warp and weft bending stiffness were derived, respectively. By comparing the theoretical solution, the results of FEM and experimental results, the accuracy and rationality of the models were verified. On this basis, influence of yarn density on bending stiffness was discussed by using this paper′s theoretical method. The results show that the warp and weft bending stiffness of the hollow integrated sandwich composites increase linearly with the increase of the yarn density. The influence factors of the warp bending stiffness from large to small is as follows: warp, pile and weft. The influence factors of the weft bending stiffness from large to small is as follows: weft, warp and pile. The influence of pile on warp stiffness is greater than that on the weft bending.

Key words: hollow integrated, bending stiffness, theoretical solution

CLC Number:

TB332

LIU Chang, ZHOU Guang-ming, WANG Di-hui, ZHU Ji-wei. STUDY ON BENDING STIFFNESS OF HOLLOW INTEGRATED SANDWICH COMPOSITES[J]. Fiber Reinforced Plastics/Composites, 2016, 0(9): 70-74.

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