Piezoelectric Actuator Applications in Structural Health Management
Summary
Piezoelectric actuators are devices that convert electrical energy into precise mechanical deformation via the converse piezoelectric effect. In structural health management, they are applied as bonded patches on critical zones of beams, plates and joints to generate compensatory strains under controlled voltages. This active intervention reduces stress intensity at crack tips, arrests crack propagation and redistributes load paths, thereby extending the service life of infrastructure across civil, aerospace and mechanical engineering sectors. When integrated with sensing elements in a smart structural system, these actuators enable real-time monitoring and adaptive control, supporting predictive maintenance and reducing unplanned downtime. Advances in computational modelling, optimisation techniques and adhesive bonding have enhanced actuator efficacy and durability. Globally, the deployment of piezoelectric-based active repair schemes is gaining traction as a cost-effective strategy for managing ageing assets, improving safety margins and minimising lifecycle costs.
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Piezoelectric Actuator Applications in Structural Health Management publication trend
The graph below shows the total number of articles in piezoelectric actuator applications in structural health management across all publications each year (not limited to Nature Index journals).
Technical terms
Piezoelectric actuator: A device that transforms an electrical signal into mechanical displacement via the converse piezoelectric effect, used to apply controlled strains to a structure.
Stress intensity factor (SIF): A parameter in fracture mechanics quantifying the intensity of the stress field near the tip of a crack under loading.
Finite element method (FEM): A numerical technique for approximating solutions to boundary value problems in engineering by subdividing a structure into discrete elements.
Adhesively bonded patch: A thin layer of piezoelectric material affixed to a host structure using an adhesive to ensure electromechanical coupling and load transfer.
Taguchi method: A statistical design of experiments approach that uses orthogonal arrays to optimise process parameters and enhance robustness against variability.
References
- Analysis of damage control of thin plate with piezoelectric actuators using finite element and machine learning approach. Fracture and Structural Integrity (2023).
- Optimization of damage repair with piezoelectric actuators using the Taguchi method. Fracture and Structural Integrity (2023).
- Enhancing Stress Intensity Factor Reduction in Cracks Originating from a Circular Hole in a Rectangular Plate under Uniaxial Stress through Piezoelectric Actuation. Materials Sciences and Applications (2024).
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