[1] Hu Zili, Zhou Wanlin,. Meso-mechanical analyses of shape memory alloy wiresreinforced smart structures with damages [J]. Journal of Southeast University (English Edition), 2005, 21 (1): 97-101. [doi:10.3969/j.issn.1003-7985.2005.01.021]
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Meso-mechanical analyses of shape memory alloy wiresreinforced smart structures with damages(
)
含损伤形状记忆合金增强智能结构的细观分析
)Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]
- Volumn:
- 21
- Issue:
- 2005 1
- Page:
- 97-101
- Research Field:
- Materials Sciences and Engineering
- Publishing date:
- 2005-03-30
Info
- Title:
- Meso-mechanical analyses of shape memory alloy wiresreinforced smart structures with damages
- 含损伤形状记忆合金增强智能结构的细观分析
- Author(s):
- Hu Zili, Zhou Wanlin
- Aeronautical Science Key Laboratory for Smart Materials and Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
- Keywords:
- smart structure; damage; shape memory alloy; failure; meso-mechanical analysis; variational principle
- PACS:
- TB330.1;TB381
- DOI:
- 10.3969/j.issn.1003-7985.2005.01.021
- Abstract:
- The thermo-mechanical behaviors of shape memory alloy(SMA)wires reinforced smart structures with damages are analyzed through variational principle and meso-mechanical method.A governing equation on the structure is derived.Mathematical expressions on meso-displacement field, stress-strain field of typical element with damages are presented.A failure criterion for interface failure between SMA wires and matrix is established under two kinds of actuation which are dead-load and temperature, where the temperature is included in effective free restoring strain.In addition, there are some other composing factors in the failure criterion such as interface properties, thermodynamical properties of SMA, initial debonding length L-l, etc.The results are significant to understand structural strength self-adaptive control and failure mechanism of SMA wires reinforced smart structures with damages, and provide a theoretical foundation for further study on the integrity of SMA smart structures.
- 从细观角度出发, 运用变分原理对含损伤形状记忆合金(SMA)增强智能结构的热、力学行为进行了分析, 导出了含损伤SMA增强智能结构的控制方程, 给出了含损伤典型单元体的细观位移场、应力应变场的数学描述, 建立了SMA增强智能结构的界面失效判据.在界面失效判据中, 不仅包含了力载荷和温度载荷2种激励, 其中温度激励隐含在有效自由回复应变当中, 还包含了界面性能、SMA热力学性能、界面初始脱粘长度等因素.这些结果对认识含损伤SMA增强智能结构的强度自适应控制及其失效机理有一定意义, 同时为进一步研究智能结构的完整性提供了相应的理论支持.
References:
[1] Liberatore S, Carman G P.Damage detection of structures based on spectral methods using piezoelectric materials [A].In:Structural Health Monitoring [C].CRC Press, 2003, 1:606-614.
[2] Dolye C, Staveley C, Henderson P.Structural health monitoring using optical fibre strain sensing systems [A].In:Structural Health Monitoring [C].CRC Press, 2003, 1:944-951.
[3] Park G, Inman D J, Farrar C R.Recent studies in piezoelectric impedance-based structural health monitoring [A].In:Structural Health Monitoring [C].CRC Press, 2003, 1:1423-1430.
[4] Tao Baoqi.Smart materials and structures [M].Beijing:National Defense Industry Press, 1997.(in Chinese)
[5] Furuya Yasubumi.Design and material evaluation of shape memory composites [J].Journal of Intelligent Material Systems and Structures, 1996, 7(3):321-330.
[6] Stalmans R, Delaey L, Van Humbeeck J.Modeling of adaptive composite materials with embedded shape memory alloy wires [A].In:Materials Research Society Symposium Proceedings [C].Boston, 1997, 459:119-130.
[7] Wei Z G, Sandstrom R, Miyazaki S.Shape memory materials and hybrid composites for smart systems, Part Ⅱ:Shape-memory hybrid composites[J]. Journal of Materials Science, 1998, 33(15):3763-3783.
[8] Song Guquan, Sun Qingping, Cherkaoui M.Role of microstructure in the thermomechanical behaviour of SMA composites [J].Transactions of the ASME, 1999, 121(1):86-92.
[9] Birman V.Review of mechanics of shape memory alloy structures [J].Applied Mechanics Review, 1997, 50(11):629-645.
[10] Boyd G, Lagoudas D C.A thermodynamical constitutive model for shape memory materials, Part Ⅱ:The SMA composite material [J].Int J Plasticity, 1996, 12(7):843-873.
[11] Bo Z, Lagoudas D C.Thermomechanical modeling of polycrystalline SMAs under cyclic loading, Part Ⅰ:Theoretical derivations[J].International Journal of Engineering Science, 1999, 37(9):1089-1140.
[12] Hu Zili, Xiong Ke, Wang Xinwei.One-dimensional incremental constitutive relation of SMA fiber reinforced smart composites with damages [J].Transactions of Nanjing University of Aeronautics and Astronautics, 2003, 35(5):465-473.(in Chinese)
[13] Hu Zili.Properties characterization and meso-mechanical analysis of smart structures with damages [D].Nanjing:Institute of Unmanned Aerocraft of Nanjing University of Aeronautics and Astronautics, 2003.(in Chinese)
[14] Li Jingyong.Finite element method [M].Beijing:Beijing University of Posts and Telecommunications Press, 2000.(in Chinese)
[15] Hu Haichang.Variational principle and application of elasticity [M].Beijing:Science Press, 1982.(in Chinese)
Memo
- Memo:
- Biography: Hu Zili(1964—), male, doctor, associate researcher, huzlgp@163.com.