The Experts below are selected from a list of 5283 Experts worldwide ranked by ideXlab platform

Jinnan Zhang - One of the best experts on this subject based on the ideXlab platform.

  • RGO-coated Elastic fibres as wearable strain sensors for full-scale detection of human motions
    Smart Materials and Structures, 2017
    Co-Authors: Qing Mi, Siyao Zang, Qi Wang, Jinnan Zhang
    Abstract:

    In this study, we chose highly-Elastic Fabric fibres as the functional carrier and then simply coated the fibres with reduced graphene oxide (rGO) using plasma treatment, dip coating and hydrothermal reduction steps, finally making a wearable strain sensor. As a result, the full-scale detection of human motions, ranging from bending joints to the pulse beat, has been achieved by these sensors. Moreover, high sensitivity, good stability and excellent repeatability were realized. The good sensing performances and economical Fabrication process of this wearable strain sensor have strengthened our confidence in practical applications in smart clothing, smart Fabrics, healthcare, and entertainment fields.

Vamsy P Chodavarapu - One of the best experts on this subject based on the ideXlab platform.

  • a polypyrrole based strain sensor dedicated to measure bladder volume in patients with urinary dysfunction
    Sensors, 2008
    Co-Authors: Sumitra Rajagopalan, Mohamad Sawan, Ebrahim Ghafarzadeh, O Savadogo, Vamsy P Chodavarapu
    Abstract:

    This paper describes a new technique to measure urine volume in patients with urinary bladder dysfunction. Polypyrrole – an electronically conducting polymer - is chemically deposited on a highly Elastic Fabric. This Fabric, when placed around a phantom bladder, produced a reproducible change in electrical resistance on stretching. The resistance response to stretching is linear in 20%-40% strain variation. This change in resistance is influenced by chemical Fabrication conditions. We also demonstrate the dynamic mechanical testing of the patterned polypyrrole on Fabric in order to show the feasibility of passive interrogation of the strain sensor for biomedical sensing applications.

Jung Kim - One of the best experts on this subject based on the ideXlab platform.

  • Dispenser printing of piezo-resistive nanocomposite on woven Elastic Fabric and hysteresis compensation for skin-mountable stretch sensing
    Smart Materials and Structures, 2018
    Co-Authors: Hyosang Lee, Haedo Cho, Sangjoon J. Kim, Yeongjin Kim, Jung Kim
    Abstract:

    Recently, piezo-resistive nanocomposites have emerged as an important smart material for realizing less obtrusive and more comfortable stretch sensing applications. To manufacture cost-effective and skin-mountable stretch sensor, dispenser printing is advantageous method because piezo-resistive nanocomposites can be directly printed on a woven Elastic Fabric in various patterns. However, both electrical and mechanical properties of the nanocomposites need to be modulated to achieve favorable sensing performance as well as strong adhesion between the nanocomposite and the Fabric to sustain large strains. Moreover, inherent hysteretic behavior of the soft nanocomposite should be compensated to obtain consistent stretch sensing. This paper presents silicone rubber mixed with long multi-walled carbon nanotubes (Long-MWCNTs) composites as a piezo-resistive transducing material for dispenser printing. High aspect ratio of the Long-MWCNTs resulted in low viscosity of a liquid state nanocomposite and high electrical conductivity. Due to the low viscosity, the liquid state nanocomposite could permeate into gaps of the woven Elastic Fabrics and ensured strong bonding force in large strains up to 35%. In addition, a modified Prandtl-Ishilinskii (MPI) model was adopted to compensate for piezo-resistive hysteresis of the nanocomposite. For validation, the skin-mountable sensor was applied to estimate rotation angle of a wrist. The sensor system estimated the rotation angle of the wrist with an estimation error of 1.93 degrees within 65 degrees range (2.9%) for the step increment and decrement test, and 7.15 degrees within 75 degrees range (9.5%) for the arbitrary movement test. Thus, the experimental results show that the dispenser printing method incorporated with hysteresis compensation can provide a guideline to implement skin-mountable smart Fabrics for stretch sensing using various nanocomposites

Jimin Fu - One of the best experts on this subject based on the ideXlab platform.

  • Exploring the relationship between applied Fabric strain and resultant local yarn strain within the Elastic Fabric based on finite element method
    Journal of Materials Science, 2020
    Co-Authors: Shun Chen, Xiao Tian, Kahei Chan, Jimin Fu
    Abstract:

    As kinds of unique textiles with high extensibility and Elasticity, Elastic Fabrics are widely used for sportswear, medical textiles and electronic textiles. The tensile behavior of Fabric is very important for post-processing and usage of Fabric. However, there are very few studies on the resultant yarn strain subjected to the applied Fabric extension, which is crucial for understanding the tensile behavior of Elastic Fabric and expanding its potential applications. In order to address the tensile behavior of Elastic Fabric, a mechanical model of Fabric was built for the analysis of local yarn strain within the Fabric through finite element method (FEM). The FEM models with full consideration of the tensile property of Elastic yarns were built to predict the relationship between the applied Fabric strain and the resultant yarn strain. An experimental study was conducted to characterize the yarn deformation behavior during the Fabric stretching and compare with the FEM prediction. The FEM simulations show a good agreement with the experimental results. Based on the FEM models, the effects of Fabric structural parameters on such a relationship were investigated for understanding the deformation mechanism and thus optimizing the tensile properties of Fabrics. A yarn strain of 27.5% could be achieved under 60% Fabric strain by adopting an optimized warp yarn spacing of 0.8 mm. The results not only shed light on the origin of high extensibility and Elasticity of Fabrics but are of great value to the design and development of Elastic materials for various applications such as textile-based electronics.

Mohammad Adhitya - One of the best experts on this subject based on the ideXlab platform.

  • Flying-cars body manufacturing using spraying Elastic waterproof and water-absorbing frame Fabric method
    2018
    Co-Authors: Sudirja, Mohammad Adhitya
    Abstract:

    This research discusses about the manufacturing method of flying-car's body. The contents of this study include literatures, research methods, and results. Focus of this research is on the technique of manufacturing flying-car's body by spraying the body frame that has been coated by Elastic Fabric. Two types of Fabrics will be used in this study namely water-absorbing Fabric and waterproof Fabric. Mold ring is used as a body frame and the Elastic Fabric to form the surface is then sprayed by resin to make it harder. After the Elastic Fabric hardened then fiberglass will be added to strengthen the material. Then tensile test and stress analysis are performed to find out the strength and suitability of material. From the test obtained that GFRP (waterproof Fabric specimen) has better strength than GFRFP (water-absorbing Fabric specimen) with tensile stress 5 [49] Kg/mm² [MPa], 2.26% elongation, and von misses 1.718e+008 N/m² while water-absorbing Fabric with 4 [39] Kg/mm² [MPa] for tensile stress, 2.24% el...

  • New method of electric sports car body manufacturing using spraying Elastic frame Fabric
    2018
    Co-Authors: Sudirja, Mohammad Adhitya, R. Danardono Agus Sumarsono
    Abstract:

    This research discusses about the manufacturing method of electric sports car’s body. The contents of this study include literatures, research methods, and results. Focus of this research is on the technique of manufacturing electric sports car’s body by spraying the body frame that has been coated with Elastic Fabric. Two types of Fabrics will be used in this study namely lycra and oscar. Mold ring is used as a body frame and the Elastic Fabric to form the surface is then sprayed by resin to make it harder. After the Elastic Fabric hardened then fiberglass will be added to strengthen the material. Then tensile test and stress analysis are perfomed to find out the strength and suitability of material. From the test obtained that oscar Fabric specimen has better strength than lycra Fabric specimen with tensile stress 5 [49] Kg/mm² [MPa], 2.26% elongation, and von misses 5.147e+007 N/m² while lycra Fabric with 4 [39] Kg/mm² [MPa] for tensile stress, 2.24% elongation, and von misses 4.083e+007 N/m². According to the experiment it can be conluded that this method only needs the cost around IDR 902,500.00 with easier and even faster for a car body manufacturing process

  • Flying-cars body manufacturing using spraying Elastic waterproof and water-absorbing frame Fabric method
    2018
    Co-Authors: Sudirja, Mohammad Adhitya
    Abstract:

    This research discusses about the manufacturing method of flying-car's body. The contents of this study include literatures, research methods, and results. Focus of this research is on the technique of manufacturing flying-car's body by spraying the body frame that has been coated by Elastic Fabric. Two types of Fabrics will be used in this study namely water-absorbing Fabric and waterproof Fabric. Mold ring is used as a body frame and the Elastic Fabric to form the surface is then sprayed by resin to make it harder. After the Elastic Fabric hardened then fiberglass will be added to strengthen the material. Then tensile test and stress analysis are performed to find out the strength and suitability of material. From the test obtained that GFRP (waterproof Fabric specimen) has better strength than GFRFP (water-absorbing Fabric specimen) with tensile stress 5 [49] Kg/mm² [MPa], 2.26% elongation, and von misses 1.718e+008 N/m² while water-absorbing Fabric with 4 [39] Kg/mm² [MPa] for tensile stress, 2.24% elongation, and von misses 4.007e+008 N/m². According to the experiment it can be concluded that this method only needs the cost around IDR 902,500.00 with easier and even faster for a car body manufacturing process.