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International Journal for Multiscale Computational Engineering
インパクトファクター: 1.016 5年インパクトファクター: 1.194 SJR: 0.554 SNIP: 0.68 CiteScore™: 1.18

ISSN 印刷: 1543-1649
ISSN オンライン: 1940-4352

International Journal for Multiscale Computational Engineering

DOI: 10.1615/IntJMultCompEng.2018027039
pages 397-407

MULTISCALE MODEL-BASED SENSITIVITY ANALYSIS OF MECHANICAL RESPONSE OF CNT/POLYMER FOR STRAIN SENSING

Krzysztof Grabowski
Faculty of Mechanical Engineering and Robotics, AGH University of Science and Technology, Krakow, Poland
Tadeusz Uhl
Faculty of Mechanical Engineering and Robotics, AGH University of Science and Technology, Krakow, Poland
Pawel Packo
Faculty of Mechanical Engineering and Robotics, AGH University of Science and Technology, Krakow, Poland

要約

Carbon nanotubes (CNTs), due to their extraordinary properties, have gained much interest in scientific communities. One of possible applications is as a sensing element. Specially strain sensing capabilities of structures based on CNTs networks dispersed within polymer were widely investigated for structural strength monitoring (SHM) in recent years. However, due to the size of CNTs, it is rather difficult to predict sensor properties or calibrate them a priori using analytical or experimental models. Numerical modeling and experimental preparation of CNT/polymer composites often idealize mechanical and geometrical properties of composite components (such as constant CNTs Young's modulus). From the design viewpoint, it is critical to distinguish the actual impact of a particular parameter on the global material response, i.e., determining the most influential factors. In the presented work, a sensitivity analysis based on the Morris method was employed for determining the influence of material design parameters on mechanical response of the composite. For the composite considered herein, input parameters include the diameter of CNTs, length of CNTs, CNTs Young's modulus, orientation of CNTs, volume fraction of CNTs and Young's modulus of the epoxy resin, and their influence on global mechanical properties; namely, the values of the Young's moduli along each axis of the Cartesian coordinate system, the Kirchoff's moduli values, and the Poisson ratios were investigated using multiscale numerical framework.


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