Rights statement: This is the author’s version of a work that was accepted for publication in Composite Structures. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Composite Structures, 240, 2020 DOI: 10.1016/j.compstruct.2020.112087
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Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - An effective microscale approach for determining the anisotropy of polymer composites reinforced with randomly distributed short fibers
AU - Cai, H.
AU - Ye, Junjie
AU - Wang, Y.
AU - Saafi, M.
AU - Huang, B.
AU - Yang, D.
AU - Ye, J.
N1 - This is the author’s version of a work that was accepted for publication in Composite Structures. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Composite Structures, 240, 2020 DOI: 10.1016/j.compstruct.2020.112087
PY - 2020/5/15
Y1 - 2020/5/15
N2 - In this paper, an effective microscopic modeling scheme is presented to analyze mechanical properties of composites with random short fibers. To this end, the displacement-load tests of the standard samples, which are acquired by cutting a short fiber-reinforced composite plate of 650 mm × 650 mm × 2.5 mm, are firstly executed under the quasi-static tensile loads. To identify the geometric sizes of the short fibers and their distributions at microscopic scale, the advanced micro-computed tomography (micro-CT) is employed by testing a small sample of 1 cm × 2.5 mm × 2.5 mm. On this basis, a simplified microscopic model is reconstructed by the 3D parametric finite-volume direct averaging micromechanics (FVDAM) theory according to the statistic results of the micro-CT images. The proposed method is further validated by comparing the effective modulus obtained from tensile tests. The scanning electron microscopy (SEM) is also used to visualize the fracture morphology of the fibers. It is found that brittle fracture occurs in the short-fibers paralleled to the external loading.
AB - In this paper, an effective microscopic modeling scheme is presented to analyze mechanical properties of composites with random short fibers. To this end, the displacement-load tests of the standard samples, which are acquired by cutting a short fiber-reinforced composite plate of 650 mm × 650 mm × 2.5 mm, are firstly executed under the quasi-static tensile loads. To identify the geometric sizes of the short fibers and their distributions at microscopic scale, the advanced micro-computed tomography (micro-CT) is employed by testing a small sample of 1 cm × 2.5 mm × 2.5 mm. On this basis, a simplified microscopic model is reconstructed by the 3D parametric finite-volume direct averaging micromechanics (FVDAM) theory according to the statistic results of the micro-CT images. The proposed method is further validated by comparing the effective modulus obtained from tensile tests. The scanning electron microscopy (SEM) is also used to visualize the fracture morphology of the fibers. It is found that brittle fracture occurs in the short-fibers paralleled to the external loading.
KW - Fracture morphology
KW - Micro-CT
KW - Random short fibers
KW - SFRCs
KW - Fiber reinforced plastics
KW - Fibers
KW - Fracture
KW - Load testing
KW - Morphology
KW - Reinforcement
KW - Scanning electron microscopy
KW - Tensile testing
KW - Three dimensional computer graphics
KW - Micro computed tomography (micro-CT)
KW - Micro CT
KW - Properties of composites
KW - Randomly distributed
KW - Short Fiber
KW - Short-fiber-reinforced composites
KW - Computerized tomography
U2 - 10.1016/j.compstruct.2020.112087
DO - 10.1016/j.compstruct.2020.112087
M3 - Journal article
VL - 240
JO - Composite Structures
JF - Composite Structures
SN - 0263-8223
M1 - 112087
ER -