The manufacture of composite structures with a built-in network of piezoceramics

Lin, Mark W.; Chang, Fu‐Kuo

doi:10.1016/s0266-3538(02)00007-6

Cited by 175 publications

(124 citation statements)

References 21 publications

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“…These differences will be obviously reduced, even undetectable on thicker specimens. The results of the flexural tests are in good accordance with results found in the literature for other materials, which show no serious reduction of the flexural properties of fibre-reinforced composites by embedded sensor network components [7,21]. Figure 9 shows two cycles taken at different times of the three-point bending fatigue test with embedded strain gage: cycle at the start and cycle at the end of the test.…”

Section: Tensile Testingsupporting

confidence: 86%

“…However, they are expensive, and they take time and require that the component or structure must be removed from service for inspection. The developments of smart composite materials open new fields to improve the structural health monitoring and life cycle of structures [7][8][9]. Currently, the insert of smart parts by integrating sensor networks in the composite become possible.…”

Section: Effect Of Embedded Strain Gage On the Mechanical Behavior Ofmentioning

confidence: 99%

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Effect of Embedded Strain Gage on the Mechanical Behavior of Composite Structures

Belhouideg

Lagache

2017

J. Mod. Mater.

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A B S T R A C TFiber reinforced composites are increasingly used in several fields such as aeronautics and civil engineering due to their increased strength, durability, corrosion resistance, resistance to fatigue and damage tolerance characteristics. The embedding of sensor networks into such composite structures can be achieved. In the present study, glass fiber reinforced Epoxy composite with integrated strain gage was analysed. Firstly, the mechanical behaviour of this material with embedded strain gage is investigated. The as-prepared samples have been tested under tensile and flexural loading in order to study the effects of the strain gage embedding on the structural stiffness and strength of the composite. It was found that the tensile stiffness decreases by 5.8% and the tensile strength decrease by 1.5% when the strain gage embedded in the material. On the other hand, the flexural strength and stiffness is increased, respectively, by 1.5% and 5.5% with an embedded strain gage. The experiments showed that embedded strain gage is functional and demonstrated the successful integration of sensor networks into composite parts. The obtained results confirm that integrated strain gage can be used for the Structural Health Monitoring (SHM) of glass fiber reinforced Epoxy composite.

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Section: Tensile Testingsupporting

confidence: 86%

Section: Effect Of Embedded Strain Gage On the Mechanical Behavior Ofmentioning

confidence: 99%

Effect of Embedded Strain Gage on the Mechanical Behavior of Composite Structures

Belhouideg

Lagache

2017

J. Mod. Mater.

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“…Furthermore, inspection takes place after the damage has already occurred, leaving the inspection process to look for residual signs of the overload or failure condition. In order to compensate for these difficulties, design engineers frequently resort to over designing, building in redundancy, or avoiding the use of composites altogether; thus leading to inefficient solutions (Lin and Chang, 2002). The lack of ductility and ductile failure mechanisms requires alternative means of detecting the onset of damage and structural distress by use of self-sensing composites.…”

Section: Multifunctional Materials: Concrete-based Compositesmentioning

confidence: 99%

Urban engineering systems: some synthetic observations on materials

Liu

Yun

2012

IJSMSS

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Materials are a multi-suits science and an essential platform for practical engineering. It has multi-dimensional impacts to the society on energy, environment, medical science, transportation, communications, automobiles, aerospace, civil infrastructure, and so on and on. Rapid advances in the design and synthesis of new materials and associated technologies have prompted many major discoveries and innovations, pushing the quality of our living world to a higher level. The thrust of the paper is placed on civil engineering materials with building, maintaining, and operating the urban centre's civil infrastructure in mind. The discussion focuses to cement-based materials like concrete and composites which are expected to propel most problems faced on urban engineering systems to good solutions.

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“…The sensors investigated in this study use piezoelectric disks to generate ultrasonic waves, and evaluate the condition of the host structure through the reflected waveforms. Similarly the SMART layer [24,25] developed at Stanford University, uses ultrasonic waves generated by piezoelectric disks to monitor the state of health. The layer consists of a number of piezoelectric transducers which are bonded to a continuous sheet of printed circuit board.…”

Section: Introductionmentioning

confidence: 99%

“…The layer can be embedded within composite laminates as an additional ply, and used to identify damage by making pitch catch ultrasonic measurements between each piezoelectric actuator and sensor pair. In addition to providing damage detection capability, the layer can be used to monitor the progress of cure [24].Optical fibre sensors are another example of a sensing technique capable of detecting damage and monitoring the curing process of composite materials [26,27]. The fibres are of minimal diameter (40-250 µm) [28], allowing them to be embedded within composite materials and used to monitor both the temperature and strain applied to a structure, by measuring variations in the local strain field [29].…”

Section: Introductionmentioning

confidence: 99%

Monitoring cure and detecting damage in composites with inductively coupled embedded sensors

Chilles

Koutsomitopoulou

Croxford

et al. 2016

Composites Science and Technology

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General rightsThis document is made available in accordance with publisher policies. Please cite only the published version using the reference above. February 2016Abstract. This paper demonstrates the capability of embedded piezoelectric sensors to monitor the state of health throughout the lifetime of composite structures. Sensors were embedded into fibre reinforced composites and used to monitor the progress of cure during manufacture, and the subsequent damage state of the cured part. The sensors used in this work consist of a single piezoelectric transducer, which is electronically connected to an inductance coil. A probe containing two inductance coils was used to make wireless ultrasonic measurements. When the probe was placed in close proximity to an embedded sensor, the electromagnetic coupling between the coils in probe and the embedded coil, allowed electronic signals to be wirelessly transferred between the transducer and the ultrasonic processing equipment. Two different inductively coupled transducer systems (ICTS) were used to monitor cure. A ICTS which generated bulk waves monitored the cure of a thick glass fibre section, and an ICTS which generated guided elastic waves monitored the cure of a large glass fibre plate. To characterise the cure monitoring ability of each ICTS, two established cure monitoring techniques; differential scanning calorimetry (DSC) and dielectric analysis, were used to record measurements during cure. The guided wave ICTS was then used to detect barely visible impact damage (BVID), created by a 10 Joule impact at a distance of 300 mm from the sensor embedded in the large glass fibre plate.

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The manufacture of composite structures with a built-in network of piezoceramics

Cited by 175 publications

References 21 publications

Effect of Embedded Strain Gage on the Mechanical Behavior of Composite Structures

Effect of Embedded Strain Gage on the Mechanical Behavior of Composite Structures

Urban engineering systems: some synthetic observations on materials

Monitoring cure and detecting damage in composites with inductively coupled embedded sensors

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