A Novel Printed Fabric Based Porous Capacitive Pressure Sensor For Flexible Electronic Applications

Masihi, S.; Atashbar, Massood Z.; Panahi, Masoud Shariat; Maddipatla, Dinesh; Bose, A. K.; Zhang, X.; Hanson, A. J.; Palaniappan, V.; Narakathu, Binu B.; Bazuin, Bradley J.

doi:10.1109/sensors43011.2019.8956672

Cited by 52 publications

(29 citation statements)

References 38 publications

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“…These files are generated in standard tessellation language (STL) and imported into a software called slicer to be sliced into layers that can be used by a 3 D printer. AM has been used in diverse sectors such as automobile industry, 1 aerospace applications, 2 printing pressure sensors [3][4][5] and surgical equipment. 6 AM is a broad term that includes many categories: fused deposition modeling (FDM) from polymer filaments, selective laser sintering (SLS) from metal or polymer powders, laminated object manufacturing (LOM) from polymer laminations, and stereolithography (SLA) of a photopolymer liquid.…”

Section: Introductionmentioning

confidence: 99%

Charpy impact energy absorption of 3D printed continuous Kevlar reinforced composites

Hetrick

Sanei

Ashour

et al. 2021

Journal of Composite Materials

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Additive manufacturing (AM) has been used widely to produce three-dimensional (3D) parts from computer-aided design (CAD) software. Traditional Fused Deposition Modeling (FDM) 3D printed polymer parts lack the necessary strength to be used for functional parts in service. The potential of printing continuous fiber reinforced composites has resulted in parts with better mechanical properties and enhanced performance. Very few studies have investigated the impact energy absorption of continuous fiber reinforced 3 D printed composites. The purpose of this work is to investigate the effect of different fiber patterns (unidirectional versus concentric), different stacking patterns (consolidated versus alternating layers), and fiber orientations (0°, 90°, 45°) on the impact energy absorption of 3 D printed continuous Kevlar fiber reinforced Onyx composites. Charpy impact testing was used to determine the impact energy absorption of the specimens. It was concluded that alternating the fiber and matrix layers as opposed to consolidating all the fiber layers in the center of the specimen results in lower impact energy absorption. Additionally, the specimens with unidirectional 90° fiber orientation had the lowest impact energy absorption among the specimens with alternating stacking pattern and those with consolidated [Formula: see text]45° angle-ply fiber orientations had the highest impact energy absorption.

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Section: Introductionmentioning

confidence: 99%

Charpy impact energy absorption of 3D printed continuous Kevlar reinforced composites

Hetrick

Sanei

Ashour

et al. 2021

Journal of Composite Materials

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show abstract

“…This manufacturing technique is highly desirable due to low cost, no post-processing, and the ability to create complex geometry. AM has been used in diverse sectors such as automobile industry, 1 aerospace applications, 2 printing pressure sensors, [3][4][5] and surgical equipment. 6 When combined with the directional properties of composites, the applications of 3D printing are endless.…”

Section: Introductionmentioning

confidence: 99%

Evaluating the effect of variable fiber content on mechanical properties of additively manufactured continuous carbon fiber composites

Hetrick

Sanei

Bakis

et al. 2020

Journal of Reinforced Plastics and Composites

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Fiber volume fraction is a driving factor in mechanical properties of composites. Micromechanical models are typically used to predict the effective properties of composites with different fiber volume fractions. Since the microstructure of 3D-printed composites is intrinsically different than conventional composites, such predictions need to be evaluated for 3D-printed composites. This investigation evaluates the ability of the Voigt, Reuss, and Halpin–Tsai models to capture the dependence of modulus and strength of 3D-printed composites on varying fiber volume fraction. Tensile coupons were printed with continuous carbon fiber-reinforced Onyx matrix using a Markforged Mark Two printer. Specimens were printed at five different volume fractions with unidirectional fibers oriented at either [Formula: see text] to obtain longitudinal, shear, and transverse properties, respectively. It is shown that the Voigt model provides an excellent fit for the longitudinal tensile strength and a reasonable fit for the longitudinal modulus with varied fiber content. For the transverse direction, while the Reuss model fails to capture the transverse modulus trend, the Halpin–Tsai model provides a reasonable fit as it incorporates more experimental parameters. Like conventional composites, addition of fibers degrades the transverse strength, and the transverse strength decreases with increasing fiber volume fraction. The shear modulus variation with fiber content could not be fitted reasonably with either Halpin–Tsai model or Reuss model.

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“…Another method is to integrate microstructures into capacitive sensor layers, which can improve the dielectric layer's effective permittivity and reduce the distance of lead‐out electrode layers when pressing the sensor. [ 54–56 ] In ref. [54], S. Masihi et al.…”

Section: Insole Pressure Sensor Constructionsmentioning

confidence: 99%

“…[ 54–56 ] In ref. [54], S. Masihi et al. utilize an additive screen‐printing processes to fabricate the porous PDMS by mixing PDMS with NaHCO 3 and HNO 3 to produce a dielectric layer, which is capable of achieving a high sensitivity of about 0.5 kPa −1 in the sensing range of 0–900 kPa.…”

Section: Insole Pressure Sensor Constructionsmentioning

confidence: 99%

Plantar Pressure‐Based Insole Gait Monitoring Techniques for Diseases Monitoring and Analysis: A Review

Chen

Dai

Grimaldi

et al. 2021

Adv Materials Technologies

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Among diverse wearable techniques, insole‐based plantar pressure monitoring systems have surged as a leading technology to monitor patient's chronic disease progression. Such technological feat has been made possible due to the strong correlation between gait and disease status. Hence, insole‐based plantar pressure monitoring techniques are growing rapidly worldwide; with several research institutions and enterprises showing an increased interest in the field. This review intends to first explain the working principles of mainstream insole plantar sensing techniques and design considerations such as sensing material selection and electronics design requirements, and then the state‐of‐the‐art algorithms for plantar pressure distribution reconstruction. Following, this article will discuss disease monitoring applications and the extraction of disease features. Finally, insight regarding common challenges and their potential solutions within the field would be elucidated.

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A Novel Printed Fabric Based Porous Capacitive Pressure Sensor For Flexible Electronic Applications

Cited by 52 publications

References 38 publications

Charpy impact energy absorption of 3D printed continuous Kevlar reinforced composites

Charpy impact energy absorption of 3D printed continuous Kevlar reinforced composites

Evaluating the effect of variable fiber content on mechanical properties of additively manufactured continuous carbon fiber composites

Plantar Pressure‐Based Insole Gait Monitoring Techniques for Diseases Monitoring and Analysis: A Review

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