Self-Sensing Composite Materials With Intelligent Fabrics

2019 ◽  
Author(s):  
Federico Fabriani ◽  
Giulia Lanzara
Keyword(s):  
Composite Materials ◽  
Structural Health Monitoring ◽  
Glass Fiber ◽  
Health Monitoring ◽  
Chemical Resistance ◽  
Piezoelectric Properties ◽  
Low Cost ◽  
High Chemical ◽  
Monitoring Applications ◽  
High Chemical Resistance

Abstract The excellent piezoelectric properties of Polyvinyl Fluoride (PVDF), its low cost, ease of workability and high chemical resistance, make it very useful to develop sensing devices for structural health monitoring applications (SHM). However, challenges occur when the devices need to be embedded into a hosting material or structure which could instead be damaged. In this study, the PVDF device is transformed into an ultralight and porous piezoelectric mat formed by ultra-long and randomly distributed micro fibers. The piezoelectric mat is embedded into a glass fiber (GF) composite by intercalating it with the GF layers during the lay-up process. This approach allows the realization of an intelligent composite that is capable to self-monitor its strain or vibrations during inservice life.

Feasibility of screen-printed PZT microceramics for Structural Health Monitoring piezocomposites applications

2013 ◽  
Vol 2013 (CICMT) ◽  
pp. 000020-000025
Author(s):  
Hélène DEBEDA ◽  
Riadh LAKHMI ◽  
Isabelle FAVRE ◽  
Jonathan ARGILLOS ◽  
Mario MAGLIONE ◽  
...  
Keyword(s):  
Structural Health Monitoring ◽  
Health Monitoring ◽  
Sacrificial Layer ◽  
Low Cost ◽  
Thick Films ◽  
Impedance Analysis ◽  
High Porosity ◽  
Structural Health ◽  
Monitoring Applications ◽  
Screen Printing Technology

Using the association of the low-cost screen-printing technology with the sacrificial layer method, the feasibility of totally released piezoelectric thick-films microceramics of gold electroded PZT type is studied. After the deposition of the sacrificial layer on an alumina substrate and subsequent printing and drying of gold, PZT and gold layers, the final firing is performed at low temperature. This is followed by the releasing step of the Au/PZT/Au in diluted acidic solution. Impedance analysis shows that the electrical properties and electromechanical coefficients of poled PZT thick-films are still lower than those of PZT ceramics. This result is correlated to the high porosity rate of the PZT layer. However these piezoelectric microceramics present a good electromechanical behaviour and can be used as sensors when solicited by vibrations or as actuators to generate vibrations in a structure on which they are bonded. Moreover, the successful fabrication associated to a good electromechanical signature on a metallic test structure suggests Structural Health Monitoring applications.

scholarly journals Tensile and Flexural Properties of Chopped Strand E-glass Fibre Mat Reinforced CNSL-Epoxy Composites.

2018 ◽  
Vol 144 ◽  
pp. 02025 ◽  
Author(s):  
Suhas Yeshwant Nayak ◽  
Srinivas Shenoy Heckadka ◽  
Linto George Thomas ◽  
Anil Baby
Keyword(s):  
Glass Fibre ◽  
Chemical Resistance ◽  
Low Cost ◽  
Flexural Properties ◽  
Micro Hardness ◽  
High Chemical ◽  
Reinforced Plastic ◽  
High Chemical Resistance ◽  
Chopped Strand Mat ◽  
Insulating Properties

Glass fibres have the principal advantages such as high tensile strength, high chemical resistance, low cost, and excellent insulating properties which makes them an important constituent in fibre reinforced plastic and composite industry. In this study, E-glass fibre in the form of Chopped Strand Mat (CSM) with different weight fractions such as 15%, 30%, and 45% were used as reinforcement in CNSL-epoxy resin composites. Fabrication of the composites was done by hand layup technique. Micro-hardness, tensile and flexural properties were investigated for all the composite panels of different compositions. The results clearly indicated an improvement in micro hardness, tensile and flexural properties with the increase in fibre content.

Rapid prototyping tools and methods for all-Topas® cyclic olefin copolymer fluidic microsystems

2006 ◽  
Vol 220 (11) ◽  
pp. 1625-1632 ◽  
Author(s):  
F Bundgaard ◽  
G Perozziello ◽  
O Geschke
Keyword(s):  
Chemical Resistance ◽  
Laser Light ◽  
Low Cost ◽  
Cyclic Olefin Copolymer ◽  
Thermal Bonding ◽  
High Chemical ◽  
Cyclic Olefin ◽  
Carbon Particles ◽  
High Chemical Resistance ◽  
Laser Bonding

Topas®, the cyclic olefin copolymer, from Topas Advanced Polymers GmbH has a number of advantages over polymers such as poly(methylmethacrylate), polydimethylsiloxane, and polycarbonate traditionally used in fluid microsystem manufacturing, such as low water absorption, high chemical resistance, good machinability, and good optical properties. A number of different processes for rapid and low-cost prototyping of all-Topas microfluidic systems, made with desktop machinery, are presented. Among the processes are micromilling of fluidic structures with a width down to 25 μm and sealing of fluidic channels by thermal bonding or laser bonding, using a thin, spin-coated layer of carbon particles between the Topas substrate and the lid to absorb the laser light.

Fabrication of SiC MEMS Pressure Sensor Based on Novel Vacuum-Sealed Method

2008 ◽  
Author(s):  
Chao Wang ◽  
Xiaobao Geng ◽  
Haixia Zhang
Keyword(s):  
Pressure Sensor ◽  
Chemical Resistance ◽  
Sacrificial Layer ◽  
Low Cost ◽  
Chemical Vapor ◽  
High Yield ◽  
Fabrication Technology ◽  
High Chemical ◽  
Wafer Cleaning ◽  
High Chemical Resistance

Fabrication of SiC MEMS pressure sensor based on novel vacuum-sealed method is presented in this paper. The sensor was fabricated using surface micromachining. Due to its excellent mechanical properties and high chemical resistance, PECVD (Plasma Enhanced Chemical Vapor Deposition) SiC was chosen as structural material. Polyimide acts as sacrificial layer which solve stiction problem in process. STS PECVD system is utilized to realize releasing, deposition and vacuum sealing consecutively in the process chamber, by this method wafer cleaning step was avoided before releasing the sacrificial layer, therefore, stiction problem is prevented. This fabrication technology can achieve high yield and low cost.

scholarly journals Advances in the Structural Health Monitoring of Bridges Using Piezoelectric Transducers

Sensors ◽  
2018 ◽  
Vol 18 (12) ◽  
pp. 4312 ◽  
Author(s):  
Yunzhu Chen ◽  
Xingwei Xue
Keyword(s):  
Structural Health Monitoring ◽  
Health Monitoring ◽  
Piezoelectric Materials ◽  
Low Cost ◽  
Rapid Development ◽  
Concrete Strength ◽  
Steel Corrosion ◽  
Fast Response ◽  
Future Application ◽  
Structural Health

With the rapid development of the world’s transportation infrastructure, many long-span bridges were constructed in recent years, especially in China. However, these bridges are easily subjected to various damages due to dynamic loads (such as wind-, earthquake-, and vehicle-induced vibration) or environmental factors (such as corrosion). Therefore, structural health monitoring (SHM) is vital to guarantee the safety of bridges in their service lives. With its wide frequency response range, fast response, simple preparation process, ease of processing, low cost, and other advantages, the piezoelectric transducer is commonly employed for the SHM of bridges. This paper summarizes the application of piezoelectric materials for the SHM of bridges, including the monitoring of the concrete strength, bolt looseness, steel corrosion, and grouting density. For each problem, the application of piezoelectric materials in different research methods is described. The related data processing methods for four types of bridge detection are briefly summarized, and the principles of each method in practical application are listed. Finally, issues to be studied when using piezoelectric materials for monitoring are discussed, and future application prospects and development directions are presented.

scholarly journals A Review of Passive RFID Tag Antenna-Based Sensors and Systems for Structural Health Monitoring Applications

Sensors ◽  
2017 ◽  
Vol 17 (2) ◽  
pp. 265 ◽  
Author(s):  
Jun Zhang ◽  
Gui Tian ◽  
Adi Marindra ◽  
Ali Sunny ◽  
Ao Zhao
Keyword(s):  
Structural Health Monitoring ◽  
Health Monitoring ◽  
Rfid Tag ◽  
Structural Health ◽  
Monitoring Applications ◽  
Passive Rfid
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