Experimental and computational analysis of structure-property relationship in carbon fiber reinforced polymer composites fabricated by selective laser sintering

Published on Jan 1, 2021in Composites Part B-engineering7.635
· DOI :10.1016/J.COMPOSITESB.2020.108499
Haibin Tang5
Estimated H-index: 5
(NUS: National University of Singapore),
Hui Chen11
Estimated H-index: 11
(NUS: National University of Singapore)
+ 2 AuthorsWentao Yan18
Estimated H-index: 18
(NUS: National University of Singapore)
Abstract A fundamental understanding of structure-property relationship of carbon fiber reinforced polymer (CFRP) composites fabricated by selective laser sintering (SLS) is essential to provide guidance to improve the mechanical properties in this promising additive manufacturing process. In the present study, we propose a new computational framework to evaluate the mechanical behavior of SLSed CFRP based on the representative volume element (RVE) model. Firstly, a new voxel-based fiber packing algorithm is proposed with the three-dimensional fiber orientation tensor to describe the fiber distribution. The porosity generated in the manufacturing process is also considered by adding spherical voids in the matrix region. In order to remove the artificial stress concentration induced by the voxel-based algorithm, a python script is developed to regenerate the geometries of different phases with conforming mesh. Meanwhile, the constitutive models of different phases in SLSed CFRP, i.e., matrix, fiber and interface, are established according to the material characteristics. Next, the proposed computational framework of SLSed CFRP is validated by the X-ray computed tomography (XCT) measurements and tensile tests of a representative SLSed carbon fiber/polyamide 12 (CF/PA12) composite. The effects of fiber volume fraction and fiber orientation distribution on the mechanical behavior of SLSed CF/PA12 composite are further quantitatively explored and ranked with regards to their influence on stiffness and failure strength.
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#2Zhangxing ChenH-Index: 7
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Cited By3
#1Haibin Tang (Nanjing University of Science and Technology)H-Index: 5
#2Qingping Sun (Ford Motor Company)H-Index: 8
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Abstract Fused filament fabrication (FFF) with continuous carbon fiber filaments has proven to be a promising manufacturing technique in engineering applications. To provide guidance in the design of 3D printed carbon fiber reinforced polymer (CFPR) components, the longitudinal compression failure of continuous CFPR composites using the FFF technique is investigated systematically. First, longitudinal compression tests are performed for 3D printed continuous CFRP composites with and without desi...
#1Vahid Monfared (IAU: Islamic Azad University)H-Index: 8
In this research article, a mini-review study is performed on the additive manufacturing (AM) of the polymeric matrix composites (PMCs) and nanocomposites. In this regard, some methods for manufacturing and important and applied results are briefly introduced and presented. AM of polymeric matrix composites and nanocomposites has attracted great attention and is emerging as it can make extensively customized parts with appreciably modified and improved mechanical properties compared to the unrei...
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Additively manufactured polymer parts are often designed like composite sandwich structures. In this work, sandwich beam-like specimens with hexagonal, triangular and rectangular infills were manuf...
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