A new two-step modeling strategy for random micro-fiber reinforced composites with consideration of primary pores

Cai, H. and Ye, J. and Shi, J. and Wang, Y. and Shi, Y. and Huang, B. and Xu, Y. and Saafi, M. and Ye, Jianqiao (2022) A new two-step modeling strategy for random micro-fiber reinforced composites with consideration of primary pores. Composites Science and Technology, 218. ISSN 0266-3538

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Abstract

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.

Item Type:
Journal Article
Journal or Publication Title:
Composites Science and Technology
Additional Information:
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
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2200
Subjects:
ID Code:
163690
Deposited By:
Deposited On:
20 Dec 2021 13:55
Refereed?:
Yes
Published?:
Published
Last Modified:
25 Nov 2022 02:35