Rights statement: This is the author’s version of a work that was accepted for publication in Composites Science and Technology. 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 Composites Science and Technology, 218, 2022 DOI: 10.1016/j.compscitech.2021.109122
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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 - A new two-step modeling strategy for random micro-fiber reinforced composites with consideration of primary pores
AU - Cai, H.
AU - Ye, J.
AU - Shi, J.
AU - Wang, Y.
AU - Shi, Y.
AU - Huang, B.
AU - Xu, Y.
AU - Saafi, M.
AU - Ye, Jianqiao
N1 - This is the author’s version of a work that was accepted for publication in Composites Science and Technology. 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 Composites Science and Technology, 218, 2022 DOI: 10.1016/j.compscitech.2021.109122
PY - 2022/2/8
Y1 - 2022/2/8
N2 - This paper presents a novel procedure to evaluate mechanical properties of random micro-fiber reinforced composites with consideration of primary pores. To this end, micro-CT experiment is conducted first to detect micro-scale morphology of the constituent materials, including size of pores and arrangement of fibers, etc. On this basis, a two-step modeling strategy with consideration of primary pores is proposed. In the first step, the equivalent mechanical properties of the pore defects and the micro-fibers are determined by the 3D parametric finite volume directly averaging micromechanics (FVDAM), by which an equivalent ellipsoidal reinforcing phase composed of fibers and pores is constructed. In the second step, the equivalent pores and fibers are embedded into matrix materials to build an RVE of the composite to calculate the elastic modulus of the composite. In addition, the 3D parametric FVDAM is further extended to simulate plastic deformation of PEEK matrix under quasi-static tensile loading. The results obtained from the proposed two-step modeling strategy have a good agreement with the results from experiments.
AB - This paper presents a novel procedure to evaluate mechanical properties of random micro-fiber reinforced composites with consideration of primary pores. To this end, micro-CT experiment is conducted first to detect micro-scale morphology of the constituent materials, including size of pores and arrangement of fibers, etc. On this basis, a two-step modeling strategy with consideration of primary pores is proposed. In the first step, the equivalent mechanical properties of the pore defects and the micro-fibers are determined by the 3D parametric finite volume directly averaging micromechanics (FVDAM), by which an equivalent ellipsoidal reinforcing phase composed of fibers and pores is constructed. In the second step, the equivalent pores and fibers are embedded into matrix materials to build an RVE of the composite to calculate the elastic modulus of the composite. In addition, the 3D parametric FVDAM is further extended to simulate plastic deformation of PEEK matrix under quasi-static tensile loading. The results obtained from the proposed two-step modeling strategy have a good agreement with the results from experiments.
KW - Mechanical properties (B)
KW - Pore defects
KW - Representative volume element (C)
KW - Short-fibre composites (A)
KW - X-ray computed tomography (D)
KW - Computerized tomography
KW - Defects
KW - Fibers
KW - Reinforcement
KW - Mechanical property (B)
KW - Modelling strategies
KW - Representative volume elements
KW - Short fibre composites
KW - Short-fiber composite (A)
KW - TWo-step model
KW - X-ray computed tomography
KW - Fiber reinforced plastics
U2 - 10.1016/j.compscitech.2021.109122
DO - 10.1016/j.compscitech.2021.109122
M3 - Journal article
VL - 218
JO - Composites Science and Technology
JF - Composites Science and Technology
SN - 0266-3538
M1 - 109122
ER -