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Hygrothermal Effects on Interfacial Stress Transfer Characteristics of Carbon Nanotubes-reinforced Composites System
Y. C. Zhang
Department of Engineering Mechanics School of Naval Architecture, Ocean and Civil Engineering Shanghai Jiaotong University Shanghai 200240, PR China
X. Wang
Department of Engineering Mechanics School of Naval Architecture, Ocean and Civil Engineering Shanghai Jiaotong University Shanghai 200240, PR China; xwang{at}sjtu.edu.cn
On the basis of the existence of strong bonding between carbon nanotubes (CNTs) and polymer matrix, and considering the axial and radial thermal expansion coefficients of CNTs as nonlinear functions of temperature changes, this article presents an analytical method to investigate hygrothermal effects on the interfacial stress transfer characteristics of single-multiwalled CNTs-reinforced composites system under hygrothermal loading by means of thermoelastic theory and conventional fiber pullout models. According to the known literature, the thermal expansion coefficient of CNTs is considered as transverse isotropy, and is a nonlinear function of temperature changes. The thermal expansion coefficient of polymer matrix is isotropy, and is a linear function of temperature changes. Numerical examples show that the interfacial shear stress transfer behavior can be described and affected by several parameters such as the temperature changes in CNTs–polymer composite, the moisture concentration changes in polymer matrix, the layer numbers, volume fractions, and chiral vectors of CNTs. From the results obtained it is found that mismatch of the thermal and moisture expansion coefficients between the CNTs and polymer matrix may be more important in governing interfacial stress transfer characteristics of CNTs-reinforced composites system.
Key Words: carbon nanotubes–polymer composites • interfacial stress transfer • hygrothermal effect • thermal expansion coefficient
References
- Iijima, S. (1991). Helical Microtubules of Graphitic Carbon, Nature (London), 354: 56–58.[CrossRef][Web of Science]
- Lu, J. P. (1997). Elastic Properties of Single and Multi-layered Nanotubes, Journal of Physics and Chemical Solids, 58(11): 1649–1652.[CrossRef]
- Lau, K. T. (2003). Interfacial Bonding Characteristics of Nanotubes/Polymer Composites, Chemical Physics Letters, 370: 399–405.[CrossRef]
- Yu, M. F., Lourle, O., Dyer, M. J., Moloni, K., Kelly, T. F. and Ruoff, R. S. (2000). Strength and Breaking Mechanics of Multi-walled Carbon Nanotubes under Tensile Load, Science, 287: 637–640.[Abstract/Free Full Text]
- Bower, C., Rosen, R. and Jin, L. (1999). Deformation for Carbon Nanotubes in Nanotubes-polymer Composites, Applied Physics Letters, 74(22): 3317–3329.[CrossRef]
- Cooper, C. A. (2000). Detachment of Nanotubes from a Polymer Matrix, Applied Physics Letters, 281(20): 3873–3875.[CrossRef]
- Liao, K. and Seam, L. I. (2001). Interfacial Characteristics of a Carbon Nanotubes-polystyrene Composite System, Applied Physics Letters, 79(25): 4225–4227.[CrossRef]
- Xiao, K. Q. and Zhang, L. C. (2004). The Stress Transfer Efficiency of a Single-walled Carbon Nanotubes in Epoxy Matrix, Journal of Materials Science, 39(14): 4481–4486.[CrossRef]
- Wagner, H. D., Lourie, O., Feldman, Y. and Tenne, R. (1998). Stress-induced Fragmentation of Multiwall Carbon Nanotubes in a Polymer Matrix, Applied Physics Letters, 72(2): 188–190.[CrossRef]
- Lourie, O., Cox, D. M. and Wagner, H. D. (1998). Buckling and Collapse of Embedded Carbon Nanotubes, Physical Review Letters, 81(8): 1638–1641.[CrossRef]
- Qian, D. and Dicdkey, E. C. (2000). Load Transfer and Deformation Mechanisms in Carbon Nanotube-polystyrene Composites, Applied Physics Letters, 76(20): 2868–2870.[CrossRef]
- Wang, X. and Yang, H. K. (2005). Axially Critical Load of Multiwall Carbon Nanotubes Under Thermal Environment, Journal of Thermal Stresses, 28(2): 185–196.
- Lau, Kin-Tak, Micrcea, Chipara, Ling, H. Y. and Hui, D. (2004). On the Effective Elastic Moduli of Carbon Nanotubes for Nanocomposite Structures, Composites Part B: Engineering, 35(2): 95–101.[CrossRef]
- Yakobson, B. I., Brabec, C. J. and Bernholc, J. (1996). Nanomechanics of Carbon Tubes: Instability Beyond Linear Response, Phys. Rev. Lett., 76: 2511-2511.[CrossRef][Web of Science][Medline]
[Order article via Infotrieve]
- Ruoff, R. S. and Lorents, D. C. (1995). Mechanical and Thermal Properties of Carbon Nanotubes, Carbon, 33(7): 925–930.[CrossRef][Web of Science]
- Lau, K. T. and Shi, S. Q. (2002). Failure Mechanisms of Carbon Nanotube/Epoxy Composites Pretreated in Different Temperature Environments, Carbon, 40(15): 2965–2968.[CrossRef]
- Kwon, Young-Kyun, Berber, Savas and Tomanek, David (2004). Thermal Contraction of Carbon Fullerenes and Nanotubes, Physical Review Letters, 92(1): 015901–015904.[CrossRef][Medline]
[Order article via Infotrieve]
- Maniwa, Yutada and Fujiwara, Ryuji (2001). Thermal Expansion of Single-walled Carbon Nanotubes (SWNT) Bundles: X-ray Diffraction Studies, Physical Review B, 64: 241402-1–241402-3.
- Tu, Z. C. and Yang, Z. C. (2002). Single Walled and Multi-walled Carbon Nanotubes Viewed as Elastic Tubes with the Effective Young's Moduli Dependent on Layer Number, Phys. Rev., B65: 233407-233407.
- Mallick, P. K. (1997). Composites Engineering Handbook [M], Marcel Dekker, USA.
- Shen, H. S. (2001). Hygrothermal Effects on the Postbucking of Shear Deformable Laminated Plates, International Journal of Mechanical Science, 43(5): 1259–1281.[CrossRef]
- Gao, Y.-C. and Mai, Y.-W. (1988). Fracture of Fibre-reinforced Materials, ZAMP, 39: 550–572.[CrossRef]
Journal of Reinforced Plastics and Composites, Vol. 25, No. 1,
71-88 (2006)
DOI: 10.1177/0731684406055456
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