Predicting Microstructural Void Nucleation in Discontinuous Fiber Composites through Coupled in-situ X-ray Tomography Experiments and Simulations
Abstract
Composite materials have become widely used in engineering applications, in order to reduce the overall weight of structures while retaining their required strength. In this work, a composite material consisting of discontinuous glass fibers in a polypropylene matrix is studied at the microstructural level through coupled experiments and simulations, in order to uncover the mechanisms that cause damage to initiate in the microstructure under macroscopic tension. Specifically, we show how hydrostatic stresses in the matrix can be used as a metric to explain and predict the exact location of microvoid nucleation that occurs during damage initiation within the composite’s microstructure. Furthermore, this work provides evidence that hydrostatic stresses in the matrix can lead to coupled microvoid nucleation and early fiber breakage, and that small fragments of fibers can play an important role in the process of microvoid nucleation. These results significantly improve our understanding of the mechanics that drive the initiation of damage in the complex microstructures of discontinuous fiber reinforced thermoplastics, while also allowing scientists and engineers to predict the microstructural damage behavior of these composites at sub-fiber resolution and with high accuracy.
- Authors:
-
- Purdue Univ., West Lafayette, IN (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
- Publication Date:
- Research Org.:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
- OSTI Identifier:
- 1661647
- Report Number(s):
- BNL-219837-2020-JAAM
Journal ID: ISSN 2045-2322
- Grant/Contract Number:
- SC0012704; AC02-06CH11357; 1662554; DGE-1333468
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Scientific Reports
- Additional Journal Information:
- Journal Volume: 10; Journal Issue: 1; Journal ID: ISSN 2045-2322
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; aerospace engineering; mechanical engineering; structural materials
Citation Formats
Hanhan, Imad, Agyei, Ronald F., Xiao, Xianghui, and Sangid, Michael D. Predicting Microstructural Void Nucleation in Discontinuous Fiber Composites through Coupled in-situ X-ray Tomography Experiments and Simulations. United States: N. p., 2020.
Web. doi:10.1038/s41598-020-60368-w.
Hanhan, Imad, Agyei, Ronald F., Xiao, Xianghui, & Sangid, Michael D. Predicting Microstructural Void Nucleation in Discontinuous Fiber Composites through Coupled in-situ X-ray Tomography Experiments and Simulations. United States. https://doi.org/10.1038/s41598-020-60368-w
Hanhan, Imad, Agyei, Ronald F., Xiao, Xianghui, and Sangid, Michael D. Thu .
"Predicting Microstructural Void Nucleation in Discontinuous Fiber Composites through Coupled in-situ X-ray Tomography Experiments and Simulations". United States. https://doi.org/10.1038/s41598-020-60368-w. https://www.osti.gov/servlets/purl/1661647.
@article{osti_1661647,
title = {Predicting Microstructural Void Nucleation in Discontinuous Fiber Composites through Coupled in-situ X-ray Tomography Experiments and Simulations},
author = {Hanhan, Imad and Agyei, Ronald F. and Xiao, Xianghui and Sangid, Michael D.},
abstractNote = {Composite materials have become widely used in engineering applications, in order to reduce the overall weight of structures while retaining their required strength. In this work, a composite material consisting of discontinuous glass fibers in a polypropylene matrix is studied at the microstructural level through coupled experiments and simulations, in order to uncover the mechanisms that cause damage to initiate in the microstructure under macroscopic tension. Specifically, we show how hydrostatic stresses in the matrix can be used as a metric to explain and predict the exact location of microvoid nucleation that occurs during damage initiation within the composite’s microstructure. Furthermore, this work provides evidence that hydrostatic stresses in the matrix can lead to coupled microvoid nucleation and early fiber breakage, and that small fragments of fibers can play an important role in the process of microvoid nucleation. These results significantly improve our understanding of the mechanics that drive the initiation of damage in the complex microstructures of discontinuous fiber reinforced thermoplastics, while also allowing scientists and engineers to predict the microstructural damage behavior of these composites at sub-fiber resolution and with high accuracy.},
doi = {10.1038/s41598-020-60368-w},
journal = {Scientific Reports},
number = 1,
volume = 10,
place = {United States},
year = {2020},
month = {2}
}
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Cited by: 14 works
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Figures / Tables:
Figure 1: An overview of the in-situ study where (A) shows a sample 9 of the 1500 X-ray projected radiographs captured by the detector over 180°, (B) shows the in-situ loading set-up with the miniature load frame, (C) shows the view of the speckled specimen from the optical camera usedmore »
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