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A Numerical Method to Model Non-linear Damping Behaviour of Martensitic Shape Memory Alloys
Pouya Haghdoust1, Antonietta Lo Conte2, Simone Cinquemani3
1Politecnico di Milano, Department of Mechanical Engineering, Via La Masa 1, I-20154 Milan, Italy. pouya.haghdoust@polimi.it.
Materials (Basel, Switzerland)
|November 8, 2018
Summary
Hybridizing composites with shape memory alloys significantly enhances damping capabilities. This technique effectively improves the energy dissipation in materials, offering advanced solutions for vibration control.
Area of Science:
- Materials Science
- Mechanical Engineering
- Composite Materials
Background:
- Composite materials often require enhanced damping properties for various applications.
- Martensitic shape memory alloys (SMAs) exhibit unique non-linear damping behavior.
- Hybridization offers a potential route to improve composite damping.
Purpose of the Study:
- To investigate the efficiency of hybridizing glass fiber reinforced polymer (GFRP) composites with martensitic shape memory alloys (SMAs) for improved damping.
- To develop and validate a numerical model for simulating the damping behavior of these hybrid composites.
Main Methods:
- Simulated the non-linear damping behavior of martensitic SMAs using a modified Masing's rules model.
- Implemented the SMA model in a finite element code user subroutine.
- Validated the model through numerical simulation of experimental hysteresis loops.
- Simulated the free decay of hybridized GFRP beams using the validated finite element model.
Main Results:
- The numerical analysis successfully reproduced the amplitude-dependent damping of hybrid beams in free decay.
- The validated finite element model accurately captured the damping characteristics of the hybridized materials.
- The study demonstrated the effectiveness of the hybridization technique for damping improvement.
Conclusions:
- Hybridizing composites with thin layers of martensitic SMAs is an efficient method for enhancing damping.
- The developed finite element model provides a reliable tool for predicting the damping performance of such hybrid structures.
- This approach offers a promising solution for vibration and damping control in composite applications.
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