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<p>Hybrid composites, integrating smart materials like Shape Memory Alloys (SMAs) into traditional composites, offer a promising pathway to enhanced vibration control and dynamic stability. This study investigates the aeroelastic and vibrational response of glass fiber specimens embedded with pre-stressed pseudoelastic SMA wires. Using a combination of numerical simulations and experimental validation, the research explores the influence of SMA integration on critical stability thresholds and vibration suppression. Numerical simulations, performed using MSC Nastran SOL 111 and SOL 145, reveal significant shifts in natural frequencies and damping characteristics due to SMA reinforcement. Random response analysis highlights enhanced damping properties and reduced vibration amplitudes, while flutter analysis predicts Limit Cycle Oscillations (LCO) at approximately 18&#xa0;m/s for SMA-embedded specimens. Experimental validation, conducted via wind tunnel testing with triaxial accelerometers, corroborates these findings, demonstrating superior vibration suppression in both pitch and heave directions for SMA-reinforced specimens. Phase portraits and transient response analyses further illustrate the enhanced damping behavior and stability along the bending direction. The parameter <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\mu\)</EquationSource> <EquationSource Format="MATHML"><math> <mi>μ</mi> </math></EquationSource> </InlineEquation>, derived from the Van der Pol equation, serves as a diagnostic tool for identifying LCO. Results show that SMA-embedded specimens approach <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(\mu = 0\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>μ</mi> <mo>=</mo> <mn>0</mn> </mrow> </math></EquationSource> </InlineEquation> earlier than plain glass fiber specimens, confirming the trade-off between improved damping and accelerated onset of LCO. This study bridges the gap between theoretical predictions and experimental outcomes, highlighting the potential of SMA-integrated composites for advanced structural applications requiring robust performance under dynamic loading.</p>

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Enhanced dynamic stability and vibration control in SMA-embedded glass fiber composites: numerical and experimental insights

  • 期刊论文

  • 发表日期：

    2025年7月6日

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  • Kartik S. Tandel,
  • Rammohan Bhanumurthy

摘要

Hybrid composites, integrating smart materials like Shape Memory Alloys (SMAs) into traditional composites, offer a promising pathway to enhanced vibration control and dynamic stability. This study investigates the aeroelastic and vibrational response of glass fiber specimens embedded with pre-stressed pseudoelastic SMA wires. Using a combination of numerical simulations and experimental validation, the research explores the influence of SMA integration on critical stability thresholds and vibration suppression. Numerical simulations, performed using MSC Nastran SOL 111 and SOL 145, reveal significant shifts in natural frequencies and damping characteristics due to SMA reinforcement. Random response analysis highlights enhanced damping properties and reduced vibration amplitudes, while flutter analysis predicts Limit Cycle Oscillations (LCO) at approximately 18 m/s for SMA-embedded specimens. Experimental validation, conducted via wind tunnel testing with triaxial accelerometers, corroborates these findings, demonstrating superior vibration suppression in both pitch and heave directions for SMA-reinforced specimens. Phase portraits and transient response analyses further illustrate the enhanced damping behavior and stability along the bending direction. The parameter \(\mu\) μ , derived from the Van der Pol equation, serves as a diagnostic tool for identifying LCO. Results show that SMA-embedded specimens approach \(\mu = 0\) μ = 0 earlier than plain glass fiber specimens, confirming the trade-off between improved damping and accelerated onset of LCO. This study bridges the gap between theoretical predictions and experimental outcomes, highlighting the potential of SMA-integrated composites for advanced structural applications requiring robust performance under dynamic loading.