Built-in piezoelectrics for processing and health monitoring of composite structures

Shen, Bob S.; Tracy, Michael J.; Roh, Youn-Seo; Chang, Fu‐Kuo

doi:10.2514/6.1996-1310

Cited by 8 publications

(6 citation statements)

References 2 publications

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“…To process the Lamb wave response for damage detection, several methods are available, such as recognition of amplitude changes, Hilbert transforms and wavelet methods [2][3][4][5]. A method based on the group velocity of the Lamb waves enables damage to be located [6], and a Lamb wave technique was also tested for quantifying the damage extent [7] by recognizing the change in the amplitude of the power spectral density of the Lamb wave response. To improve the efficiency of such an active system in composites, piezoceramic transducers (PZTs) are embedded in the structure.…”

Section: Introductionmentioning

confidence: 99%

Actuation performance of embedded piezoceramic transducer in mechanically loaded composites

Paget

Levin

Delebarre

2002

Smart Mater. Struct.

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The performance of embedded piezoceramic transducers (PZTs) used as Lamb wave generators was investigated in this paper. The composite specimens with a PZT embedded in the mid-plane were subjected to tensile andcompressive monotonic loading as well as tension-compression fatigue loading. Both the static and fatigue tests revealed the large working range of embedded PZTs, despite the presence of damage observed by microscopy. The Lamb wave response remained unchanged after a large number of fatigue cycles; around 50 000-100 000 cycles at strain levels of ±0.20%. At larger numbers of cycles, the changes in terms of amplitude and frequency in the Lamb wave response were believed to be associated with increasing matrix cracking in the specimens.

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Section: Introductionmentioning

confidence: 99%

Actuation performance of embedded piezoceramic transducer in mechanically loaded composites

Paget

Levin

Delebarre

2002

Smart Mater. Struct.

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“…However, this method needs to be improved to be able to detect small size delaminations and other types of damage in composite structures. The structural model was also applied to detect impact delamination [66] and further for self-monitoring of the manufacturing process and self-diagnosising of service-induced damage [67].…”

Section: On-line Health Monitoring With Piezoelectric Transducermentioning

confidence: 99%

Vibration-Based Model-Dependent Damage (Delamination) Identification and Health Monitoring for Composite Structures — A Review

Zou

Tong

Steven

2000

Journal of Sound and Vibration

659

331

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“…Some researchers used a cutout technique to embed the piezoelectric sensors (Moulin et al, 1997;Mall and Hsu, 2000). Other researchers directly embedded the piezoelectric elements avoiding the cutting of the fibers (Paget et al, 2002;Shen et al, 1996). A research group of Stanford University applied the printed circuit technique to fabricate a thin flexible layer with a network of piezoceramics (Lin and Chang, 1998).…”

Section: Introductionmentioning

confidence: 99%

Built-in Sensor Network for Structural Health Monitoring of Composite Structure

Qing

Beard²,

Kumar

et al. 2007

Journal of Intelligent Material Systems and Structures

Self Cite

116

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By implementing a built-in sensor network on a composite structure, crucial information regarding the condition, damage state, and service environment of the structure can be obtained. In this study, methods for integrating piezoelectric sensor networks into a composite structure during different fabrication processes, including the resin transfer molding (RTM) and filament winding processes, are examined. To integrate sensor networks with different contours of structures, the method to fabricate a three-dimensional (3-D) diagnostic layer is developed. It is demonstrated that a large number of sensors supported on a thin flexible dielectric film, called a SMART Layer, offers a simple and efficient way to integrate a large sensor network onto a complex 3-D structure. The sensor network permanently embedded inside the composite structures can be used with either active sensing or passive sensing to monitor the health condition of a structure throughout its lifetime.

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Built-in piezoelectrics for processing and health monitoring of composite structures

Cited by 8 publications

References 2 publications

Actuation performance of embedded piezoceramic transducer in mechanically loaded composites

Actuation performance of embedded piezoceramic transducer in mechanically loaded composites

Vibration-Based Model-Dependent Damage (Delamination) Identification and Health Monitoring for Composite Structures — A Review

Built-in Sensor Network for Structural Health Monitoring of Composite Structure

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