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You searched for: Journal Composites Remove constraint Journal: Composites Publication Year 2019 Remove constraint Publication Year: 2019 Source 2019 v.121 Remove constraint Source: 2019 v.121
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1. A general strength model for fiber bundle composites under transverse tension or interlaminar shear

Author:
Li, Wen; Chen, Wei; Tang, Liqun; Jiang, Zhenyu; Huang, Peiyan
Source:
Composites 2019 v.121 pp. 45-55
ISSN:
1359-835X
Subject:
composite materials; models; polymers; prediction; shear strength; tensile strength
Abstract:
... Fiber bundle composites (FBCs), prepared by embedding a piece of fiber bundle in polymer matrix, can imitate the part in unidirectional FRP laminates which fails under transverse tension or interlaminar shear. However, there is a remarkable discrepancy between the results obtained in the tests of FBCs and corresponding standard tests of laminates. This paper explores the reasons for the observed g ...
DOI:
10.1016/j.compositesa.2019.03.009

2. A nano graphene oxide/α-zirconium phosphate hybrid for rigid polyvinyl chloride foams with simultaneously improved mechanical strengths, smoke suppression, flame retardancy and thermal stability

Author:
Wang, Zhengzhou; Huang, Zhenyu; Li, Xiaoyan; Zhou, Jian-an
Source:
Composites 2019 v.121 pp. 180-188
ISSN:
1359-835X
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; calorimeters; composite materials; flame retardants; foams; graphene; heat; oxygen; phosphates; poly(vinyl chloride); scanning electron microscopy; smoke; strength (mechanics); thermal stability; transmission electron microscopy
Abstract:
... A nano graphene oxide/α-zirconium phosphate (α-ZrP) hybrid (GOZP) was synthesized by an in-situ technique, and characterized by XRD, FTIR, SEM, TEM, etc. Rigid polyvinyl chloride (RPVC) foams containing GOZP exhibit high mechanical, flame retardant and smoke suppressive properties. The compressive and flexural strengths of sample RPVC/GOZP3 with 3 phr GOZP increase by 28.6% and 45.2%, respectively ...
DOI:
10.1016/j.compositesa.2019.03.021

3. A novel polyamide-type cyclophosphazene functionalized rGO/WS2 nanosheets for bismaleimide resin with enhanced mechanical and tribological properties

Author:
Chen, Zhengyan; Yan, Hongxia; Guo, Liulong; Li, Lin; Yang, Pengfei; Liu, Biao
Source:
Composites 2019 v.121 pp. 18-27
ISSN:
1359-835X
Subject:
composite materials; dispersibility; friction; microstructure; nanosheets; polyethyleneimine; polymerization
Abstract:
... Bismaleimide (BMI) composites reinforced with novel polyamide-type cyclophosphazene functionalized rGO/WS2 were successfully fabricated in this paper. RGO/WS2 was firstly functionalized with polyphosphazene (poly (cyclophosphazene-co-branched polyethylenimine)) (PHbP) by a simple precipitation polymerization approach. The microstructure and morphology of as-prepared PHbP@rGO/WS2 were characterized ...
DOI:
10.1016/j.compositesa.2019.03.003

4. A simple and robust approach for visual overload indication - UD thin-ply hybrid composite sensors

Author:
Rev, Tamas; Jalalvand, Meisam; Fuller, Jonathan; Wisnom, Michael R.; Czél, Gergely
Source:
Composites 2019 v.121 pp. 376-385
ISSN:
1359-835X
Subject:
acoustics; civil engineering; composite materials; digital images; mechanical testing; monitoring
Abstract:
... A novel, purpose-designed, thin interlayer glass/carbon-epoxy hybrid composite sensor concept is presented here that can be used for structural health monitoring (SHM), offering potential for safer operation in service. The hybrid composite sensors indicate the overload of a structure by exhibiting a change in their appearance when loaded in tension over a predefined strain value. The sensors can ...
DOI:
10.1016/j.compositesa.2019.03.005

5. A study of the thermal degradation of glass fibre sizings at composite processing temperatures

Author:
Thomason, James L.; Nagel, Ulf; Yang, Liu; Bryce, David
Source:
Composites 2019 v.121 pp. 56-63
ISSN:
1359-835X
Subject:
adhesion; composite materials; epoxides; glass fibers; mechanical testing; polypropylenes; temperature; thermal degradation; thermal stability
Abstract:
... Although not fully understood, it is well recognized that optimal working of glass fibre sizings is necessary to maximize the performance of glass fibre reinforced polymer composites. It is important that the organic components in such sizings continue to function after exposure to the high temperatures often experienced during composite processing. This study presents the results on the thermal s ...
DOI:
10.1016/j.compositesa.2019.03.013

6. A study on the longitudinal compression strength of fibre reinforced composites under uniaxial and off-axis loads using cross-ply laminate specimens

Author:
Thomson, Daniel; Cui, Hao; Erice, Borja; Petrinic, Nik
Source:
Composites 2019 v.121 pp. 213-222
ISSN:
1359-835X
Subject:
composite materials; compression strength; mechanical stress; polymers
Abstract:
... Longitudinal compression testing of unidirectional FRP laminates remains a challenge due to the difficulty in applying high compressive loads without stress concentrations and boundary effects leading to premature failure. This work aims to critically evaluate different specimen designs and laminate configurations, cross-ply in particular, for the determination of longitudinal compression properti ...
DOI:
10.1016/j.compositesa.2019.03.034

7. Bio-inspired design for enhanced damage tolerance of self-reinforced polypropylene/carbon fibre polypropylene hybrid composites

Author:
Mencattelli, Lorenzo; Tang, Jun; Swolfs, Yentl; Gorbatikh, Larissa; Pinho, Silvestre T.
Source:
Composites 2019 v.121 pp. 341-352
ISSN:
1359-835X
Subject:
carbon fibers; composite materials; energy; engineering; microstructure; polypropylenes
Abstract:
... In this work, we investigate the toughness of an inter-layer Self-Reinforced Polypropylene/Carbon Fibre Polypropylene (SRPP/CFPP) cross-ply hybrid composite and devise strategies to improve two aspects of its damage tolerance: (i) increasing the energy dissipation capability and (ii) enhancing the impact damage tolerance. To this end, we introduced discontinuities in the form of laser-cuts across ...
DOI:
10.1016/j.compositesa.2019.03.028

8. Characterization of inter-ply slipping behaviors in hot diaphragm preforming: Experiments and modelling

Author:
Wang, Lidong; Xu, Peng; Peng, Xiongqi; Zhao, Kexin; Wei, Ran
Source:
Composites 2019 v.121 pp. 28-35
ISSN:
1359-835X
Subject:
carbon fibers; composite materials; diaphragm; epoxides; friction; manufacturing; mathematical models; temperature
Abstract:
... Understanding the inter-ply slipping behaviors of uncured prepregs is fundamental for avoiding defects such as wrinkling during manufacturing of large-scale composite parts in hot diaphragm forming. This work investigates the inter-ply slipping behaviors in hot diaphragm preforming of carbon fiber/epoxy prepregs. A home-made testing system is used to characterize the inter-ply slipping behaviors o ...
DOI:
10.1016/j.compositesa.2019.03.012

9. Considering the stress concentration of fiber surfaces in the prediction of the tensile strength of unidirectional carbon fiber-reinforced plastic composites

Author:
Yamamoto, Go; Onodera, Miho; Koizumi, Keita; Watanabe, Jun; Okuda, Haruki; Tanaka, Fumihiko; Okabe, Tomonaga
Source:
Composites 2019 v.121 pp. 499-509
ISSN:
1359-835X
Subject:
composite polymers; epoxides; finite element analysis; prediction; simulation models; tensile strength
Abstract:
... The tensile strengths of unidirectional carbon fiber-reinforced plastic (CFRP) were predicted by using a spring element model that considers the surface stress concentration on fibers caused by a fracture site in an adjacent fiber. The surface stress concentration on the fibers was experimentally evaluated by implementing multi-fiber fragmentation tests in conjunction with a spring element model s ...
DOI:
10.1016/j.compositesa.2019.04.011

10. Construction of multiple crosslinking networks in EPDM rubber: Synergistic reinforcing effect of graphene-zinc dimethacrylate on EPDM and improvement mechanism of sealing resilience

Author:
Yuan, Zun; Li, Weihang; Li, Chengjie; Ye, Lin
Source:
Composites 2019 v.121 pp. 254-264
ISSN:
1359-835X
Subject:
crosslinking; graphene; nanocomposites; rubber; stress relaxation; tensile strength; zinc
Abstract:
... EPDM/Graphene (GN) - Zinc dimethacrylate (ZDMA) nano-composite was prepared by in situ formation of ZDMA in GN layers. Both EPDM and ZDMA molecules were confirmed to intercalate into GN layers with strong interfacial interactions and high efficiency. Compared with neat EPDM, addition of GN-ZDMA resulted in 291% increase of tensile strength and 48% increase of elongation at break, superior to that ...
DOI:
10.1016/j.compositesa.2019.03.039

11. Continuous surface modification of glass fibers in a roll-to-roll plasma-enhanced CVD reactor for glass fiber/polyester composites

Author:
Cech, Vladimir; Marek, Ales; Knob, Antonin; Valter, Jan; Branecky, Martin; Plihal, Petr; Vyskocil, Jiri
Source:
Composites 2019 v.121 pp. 244-253
ISSN:
1359-835X
Subject:
adhesion; coatings; composite materials; cost effectiveness; glass fibers; polyesters; polymerization; shear strength; vapors
Abstract:
... Plasma-enhanced chemical vapor deposition (PECVD) is a cost-effective and green process of plasma polymer synthesis that can be used as a gentle but powerful tool for the surface modification of fibers and retains their bulk properties. This paper introduces the notion of a compact and modular device consisting of low-pressure reactor segments that have a specialized function and are adapted for t ...
DOI:
10.1016/j.compositesa.2019.03.036

12. Effect of carbon nanotube morphology on properties in thermoplastic elastomer composites for strain sensors

Author:
Sang, Zhen; Ke, Kai; Manas-Zloczower, Ica
Source:
Composites 2019 v.121 pp. 207-212
ISSN:
1359-835X
Subject:
carbon; carbon nanotubes; electrical conductivity; exercise; muscles; polymer nanocomposites; polyurethanes; thermoplastics
Abstract:
... Electrically conductive thermoplastic polyurethane (TPU) composites with carbon nanofillers have potential applications in strain sensors. However, it is challenging to simultaneously achieve low percolation threshold, good electrical conductivity and high strain sensitivity especially in melt-mixed TPU-carbon filler nanocomposites. Here, we report on using branched carbon nanotubes known as carbo ...
DOI:
10.1016/j.compositesa.2019.03.007

13. Effect of external pressure and resin flushing on reduction of process-induced voids and enhancement of laminate quality in heated-VARTM

Author:
Yalcinkaya, M. Akif; Sozer, E. Murat; Altan, M. Cengiz
Source:
Composites 2019 v.121 pp. 353-364
ISSN:
1359-835X
Subject:
composite materials; epoxides; glass; manufacturing; shear strength
Abstract:
... Applying external pressure on the vacuum bag in heated-Vacuum Assisted Resin Transfer Molding (heated-VARTM) is a new approach for manufacturing high quality composite laminates with minimal voids. The present study focuses on the effects of external pressure and resin flushing on the microstructural features of the laminates, including spatial variation and size distribution of the voids as well ...
DOI:
10.1016/j.compositesa.2019.03.040

14. Effect of heat treatment on interfacial bonding and strengthening efficiency of graphene in GNP/Al composites

Author:
Li, Jianchao; Zhang, Xuexi; Geng, Lin
Source:
Composites 2019 v.121 pp. 487-498
ISSN:
1359-835X
Subject:
aluminum; annealing; composite materials; graphene; heat treatment; microstructure; models; temperature; tensile strength
Abstract:
... Interfacial bonding state between graphene nano-platelets (GNP) and aluminum strongly influences the strengthening efficiency of GNP/Al composites. Here, 2.0 wt% GNP/Al composites were annealed at various temperatures to explore the effects of heat treatment on microstructure, mechanical properties and strengthening behavior of graphene. Interfacial reaction between GNP and Al occurred in composit ...
DOI:
10.1016/j.compositesa.2019.04.010

15. Effect of infrared laser surface treatment on the morphology and adhesive properties of scarfed CFRP surfaces

Author:
Harder, Sergej; Schmutzler, Henrik; Hergoss, Philipp; Freese, Jens; Holtmannspötter, Jens; Fiedler, Bodo
Source:
Composites 2019 v.121 pp. 299-307
ISSN:
1359-835X
Subject:
X-ray photoelectron spectroscopy; carbon fibers; chemical composition; composite materials; milling; nitrogen; oxygen; polymers; scanning electron microscopy
Abstract:
... The bonded scarf joint is a common design for the repair of carbon fibre reinforced polymer (CFRP). Surface treatment is an essential factor for the performance of such joints. Infrared (IR) laser surface treatment is of particular interest, as it has the potential for a fast and automatable process. The effect of the IR laser surface treatment on the morphology was investigated by scanning electr ...
DOI:
10.1016/j.compositesa.2019.02.025

16. Effect of ply thickness and ply level hybridization on the compression after impact strength of thin laminates

Author:
Sasikumar, A.; Trias, D.; Costa, J.; Blanco, N.; Orr, J.; Linde, P.
Source:
Composites 2019 v.121 pp. 232-243
ISSN:
1359-835X
Subject:
aircraft; composite materials; impact load; impact strength
Abstract:
... There is a lack of research available on how thin laminates respond to impact and post impact loads, even though thin structures are used in present-day aircrafts. This experimental paper employs thick, standard and thin uni-directional plies to investigate the effect ply thickness has on thin laminates on their impact and compression after impact (CAI) response. Further, we propose two hybrid lam ...
DOI:
10.1016/j.compositesa.2019.03.022

17. Effect of processing parameters and void content on mechanical properties and NDI of thermoplastic composites

Author:
Saenz-Castillo, D.; Martín, M.I.; Calvo, S.; Rodriguez-Lence, F.; Güemes, A.
Source:
Composites 2019 v.121 pp. 308-320
ISSN:
1359-835X
Subject:
composite materials; engineering; mechanical properties; microscopy; porosity; processing technology; quality control; temperature; thermoplastics; ultrasonics
Abstract:
... Several consolidation cycles were performed to study the impact of processing parameters on void content, ultrasonic NDT and mechanical performance of CF/PEEK composites. A series of [+45/−45]4S laminates were manufactured by out-of-autoclave technologies including vacuum bag only, hot-press, and automatic lay-up with in-situ consolidation. A range of porosity between 0 and 19% of void content was ...
DOI:
10.1016/j.compositesa.2019.03.035

18. Electromagnetic shielding property of carbon fiber felt made of different types of short-chopped carbon fibers

Author:
Liang, Jiyong; Gu, Yizhuo; Bai, Ming; Wang, Shaokai; Li, Min; Zhang, Zuoguang
Source:
Composites 2019 v.121 pp. 289-298
ISSN:
1359-835X
Subject:
carbon fibers; composite materials; electromagnetic interference; mixing; polyacrylonitrile; surface area
Abstract:
... Three types of short-chopped carbon fibers (SCF), including polyacrylonitrile based T300, M40J and pitch-based XN-90-60s, were used to prepare SCF felts by wet-laid method with hydroxyethylcellulos as adhesive. Electromagnetic interference shielding effectiveness (EMI SE) in X band was investigated using waveguide method. It is found that stirring treatment leads to higher damaging degree of XN90 ...
DOI:
10.1016/j.compositesa.2019.03.037

19. Enhancement of thermal conductivity of carbon fiber-reinforced polymer composite with copper and boron nitride particles

Author:
Zheng, Xiru; Kim, Seongmin; Park, Chan Woo
Source:
Composites 2019 v.121 pp. 449-456
ISSN:
1359-835X
Subject:
annealing; boron nitride; carbon; carbon fibers; coatings; composite materials; copper; electrophoresis; polymers; thermal conductivity
Abstract:
... A hybrid filler system, which combines hexagonal boron nitride (hBN) and copper particles, was applied on the surface of continuous carbon fiber tapes by utilizing electrophoretic deposition to maximize the thermal conductivity of carbon fiber-reinforced polymer (CFRP) composite in this study. The results show that as the deposition time increased, the thermal conductivity increased. The annealing ...
DOI:
10.1016/j.compositesa.2019.03.030

20. Fabrication and investigation on the PANI/MWCNT/thermally annealed graphene aerogel/epoxy electromagnetic interference shielding nanocomposites

Author:
Huangfu, Yiming; Ruan, Kunpeng; Qiu, Hua; Lu, Yuanjin; Liang, Chaobo; Kong, Jie; Gu, Junwei
Source:
Composites 2019 v.121 pp. 265-272
ISSN:
1359-835X
Subject:
aerogels; ammonium persulfate; aniline; annealing; ascorbic acid; carbon nanotubes; carboxylation; electrical conductivity; electromagnetic interference; epoxides; graphene; graphene oxide; hardness; heat tolerance; hydrochloric acid; nanocomposites; polymers; ultrasonics
Abstract:
... After ultrasonic dispersion of graphene oxide (GO) prepared by modified Hummers method and surface carboxylated multi-walled carbon nanotubes (f-MWCNT), L-ascorbic acid was added and the MWCNT/thermally annealed graphene aerogel (MWCNT/TAGA) was obtained by thermal annealing. Polyaniline/MWCNT/TAGA (PANI/MWCNT/TAGA) was prepared by slow adding ammonium persulfate into aniline/hydrochloric acid sol ...
DOI:
10.1016/j.compositesa.2019.03.041