MEASUREMENT AND ANALYSIS OF 3D DEFORMATION IN GLASS FIBER REINFORCEDCOMPOSITES BY USING COMPUTED TOMOGRAPHY

Abstract

Abstract: A glass fiber reinforced composite specimen was scanned by using industrial Computed Tomography (CT) in situ, and CT images of the specimen under different loading were obtained. The digital volume correlation (DVC) technique was applied to calculating the three-dimensional displacement fields and strain fields in the specimen, and the strain evolution and damage mechanism were revealed. The microstructure of the fiber reinforced composite can be used as the carrier of deformation. The accuracy of the experiment is 0.063 voxels (2.8 μm). The displacement field and strain field distribution obtained by DVC can reflect the internal structural characteristics of the specimen directly. With reference of the distribution of transverse shear strain, the shear band was formed before the specimen was broken, which eventually led to the interface delamination. In addition, the wrapping of the cross section due to the transverse shear was verified by the distribution of its displacement. These results show that the DVC method combined with CT can directly reflect the deformation characteristics of the internal structure of the composite, and provide a new method on studying the internal deformation and the failure of the material.

Key words: glass fiber reinforced composite, industrial CT, three-point bending test, digital volume correlation, internal three dimensional strain field

CLC Number:

TB332

MAO Ling-tao, WEI Kai, ZHU Zi-yan, LIU Hai-zhou. MEASUREMENT AND ANALYSIS OF 3D DEFORMATION IN GLASS FIBER REINFORCEDCOMPOSITES BY USING COMPUTED TOMOGRAPHY[J]. Fiber Reinforced Plastics/Composites, 2018, 0(9): 5-10.

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