Dr. Tanvir Sohail Profile

Dr. Tanvir Sohail

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Proceedings Article | 9 May 2024 Presentation + Paper

Multiscale modeling-enabled design of multifunctional composites

Sumit Gupta, Tanvir Sohail, Amit Naskar, Christopher Bowland

Proceedings Volume 12950, 129500N (2024) https://doi.org/10.1117/12.3011931

KEYWORDS: Composites, Matrices, Sensors, Electrical properties, Piezoelectric materials, Materials properties, Thin films, Piezoresistivity, Industry, Ferroelectric materials

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This study aims to create a comprehensive model that considers multiple scales and physics for predicting the electromechanical behavior of fiber-reinforced composites enhanced with barium titanate (BaTiO₃). In our earlier work, we have demonstrated that depositing BaTiO₃ microparticles of 200-nm-diameter, on fiber surfaces during fiber-reinforced composite fabrication enhances mechanical strength, passive self-sensing, and energy harvesting properties. The key is to carefully control the microparticle concentration to prevent agglomeration. Since the particles are micron-sized, understanding how agglomeration affects the composites' electromechanical properties is crucial for guiding such multifunctional materials’ design. This study introduces a micromechanics-based approach to explore the impact of microparticle dispersion on the bulk composites' electromechanical properties. Insights gained from this investigation are applied in experiments, enabling accurate predictions of mechanical and self-sensing responses in BaTiO₃-enhanced fiber-reinforced composites. Micro-level findings from this computational approach can be integrated into larger continuum models to comprehensively capture the electromechanical behavior of the composite structures at bulk scale. The proposed model is validated by comparing predictions with experimental results, accounting for the nonlinear mechanical and electromechanical behaviors of constituent materials. Consequently, this computational model serves as a digital platform for efficiently designing multifunctional composites.

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