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NiTi-polyimide composites prepared using thermal imidization process

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    0462167 - FZÚ 2017 RIV US eng J - Journal Article
    Vokoun, David - Sysel, P. - Heller, Luděk - Kadeřávek, L. - Svatuška, Michal - Goryczka, T. - Kafka, Vratislav - Šittner, Petr
    NiTi-polyimide composites prepared using thermal imidization process.
    Journal of Materials Engineering and Performance. Roč. 25, č. 5 (2016), 1993-1999. ISSN 1059-9495
    R&D Projects: GA ČR GC15-13174J; GA ČR GA14-15264S
    Institutional support: RVO:68378271 ; RVO:68378297
    Keywords : actuator * composite * model * NiTi * polyimide * residual * stress
    Subject RIV: BM - Solid Matter Physics ; Magnetism
    Impact factor: 1.331, year: 2016

    We manufactured NiTi plate-polyimide composite samples and analyzed their thermomechanical behavior. The residual stresses formed in the composite result from the shift of transformation temperatures and shape changes during thermal cycling. We demonstrate the use of finite element analysis for modeling the shape changes. The shape changes result from the difference in coefficients of thermal expansion and from the changes of Young’s modulus and of the coefficient of thermal expansion in the NiTi shape memory alloy.

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