scholarly journals Influence of Potential Differential Voltage on Electric Resistance of Needle Punched Non-Woven Jute Fabrics

2020 ◽  
pp. 1-6 ◽  
Keyword(s):  
Electrical Resistance ◽  
Specific Resistance ◽  
Input Voltage ◽  
Gauge Length ◽  
Electric Resistance ◽  
Jute Fabric ◽  
Differential Voltage ◽  
Jute Fabrics ◽  
Impedance Meter

In this research, the electrical resistance of needle-punched non-woven jute fabric at different input voltage was measured. Here, to determine the electrical resistance, a device named the digital impedance meter has been used. The specific resistance for the different gauge lengths of non-woven jute fabric has been observed to enhance the use of jute fabric for electrical purposes. It has been observed that the electrical resistance increased with the higher value of gauge length and decreased with the increase of input voltage.

scholarly journals Comparative Studies of Electrical Resistance in Woven and Non-Woven Jute Fabrics at Different Input Voltage

2020 ◽  
pp. 106-112
Keyword(s):  
Electrical Properties ◽  
Comparative Studies ◽  
Electrical Resistance ◽  
Input Voltage ◽  
Gauge Length ◽  
Experimental Results ◽  
Essential Factor ◽  
Jute Fabric ◽  
Increasing Trend ◽  
Jute Fabrics

The use of jute fabrics is showing an increasing trend in textile, building and automobile sectors. Electrical properties such as conductivity, resistance, di-electric constant, insulation, etc. are the essential factor for consideration for using jute fabrics in these sectors. For this reason, a study was carried out to find out the changes in electrical properties of woven and nonwoven jute fabrics at different input voltage. The electrical resistance of jute fabrics was measured by a digital impedance meter. Effects of input voltage, gauge length, and type of fabrics on electrical resistance were studied and analyzed. Experimental results indicated that the electrical resistance of woven and needle punched nonwoven jute fabrics decreased with the increase of input voltage and increased with the increase in gauge length. The highest value of electrical resistance in woven jute fabrics was 394 Mohm/cm at 2 cm gauge length and 60 V of the input voltage. In nonwoven jute fabrics, the maximum electrical resistance was 257 M ohm/cm which was obtained at 2 cm gauge length and 60 V of electrical resistance. Woven jute fabric showed a higher value of resistance than nonwoven jute fabric for different voltages. It was also observed that the electrical resistance varied with the type of fabrics used in this study.

scholarly journals Construção de um sensor de condutividade elétrica do solo: uma proposta multidisciplinar

2019 ◽  
Vol 40 ◽  
pp. 107
Author(s):  
Fernando Siqueira Scherer ◽  
Silvana Maldaner ◽  
Matheus Vinícius dos Santos Mello ◽  
Priscila Bernardeli Miranda ◽  
Andrei Da Cunha Lima ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Electrical Resistance ◽  
Voltage Drop ◽  
Specific Resistance ◽  
Low Cost ◽  
Input Voltage ◽  
Important Variable ◽  
Simple Circuit ◽  
Conductive Plate ◽  
The Wire

The electrical conductivity of the soil is an important variable in agriculture. Their knowledge is essential in fertirrigation and can assist in soil management1. Thus, the proposal of this work is the development of a sensor to determine the electrical conductivity of the soil at low cost. To determine the electrical conductivity, the second law of Ohm (R = ρ (l / A)) is used. The equation of this law relates the electrical resistance of a conductor, with the length of the wire, area of straight section of the wire and the resistivity (or specific resistance of the material). Physically, the electrical conductivity (σ) is the inverse of the resistivity (ρ). Thus, with a microcontroller, an Arduino, a control resistor and conductive plate electrodes, a simple circuit is created to measure the electrical conductivity. The input voltage is 5v, the resistance of the control resistor is 500kohms, with this information the current in the circuit is calculated and the voltage drop in the circuit and consequently the electrical conductivity of the ground is determined.

scholarly journals Toward Structural Health Monitoring of Civil Structures Based on Self-Sensing Concrete Nanocomposites: A Validation in a Reinforced-Concrete Beam

2021 ◽  
Vol 15 (1) ◽  
Author(s):  
Diego L. Castañeda-Saldarriaga ◽  
Joham Alvarez-Montoya ◽  
Vladimir Martínez-Tejada ◽  
Julián Sierra-Pérez
Keyword(s):  
Reinforced Concrete ◽  
Damage Detection ◽  
Direct Current ◽  
Health Monitoring ◽  
Electrical Resistance ◽  
Concrete Beam ◽  
Reinforced Concrete Beam ◽  
Structural Member ◽  
Rc Beam ◽  
Electric Resistance

AbstractSelf-sensing concrete materials, also known as smart concretes, are emerging as a promising technological development for the construction industry, where novel materials with the capability of providing information about the structural integrity while operating as a structural material are required. Despite progress in the field, there are issues related to the integration of these composites in full-scale structural members that need to be addressed before broad practical implementations. This article reports the manufacturing and multipurpose experimental characterization of a cement-based matrix (CBM) composite with carbon nanotube (CNT) inclusions and its integration inside a representative structural member. Methodologies based on current–voltage (I–V) curves, direct current (DC), and biphasic direct current (BDC) were used to study and characterize the electric resistance of the CNT/CBM composite. Their self-sensing behavior was studied using a compression test, while electric resistance measures were taken. To evaluate the damage detection capability, a CNT/CBM parallelepiped was embedded into a reinforced-concrete beam (RC beam) and tested under three-point bending. Principal finding includes the validation of the material’s piezoresistivity behavior and its suitability to be used as strain sensor. Also, test results showed that manufactured composites exhibit an Ohmic response. The embedded CNT/CBM material exhibited a dominant linear proportionality between electrical resistance values, load magnitude, and strain changes into the RC beam. Finally, a change in the global stiffness (associated with a damage occurrence on the beam) was successfully self-sensed using the manufactured sensor by means of the variation in the electrical resistance. These results demonstrate the potential of CNT/CBM composites to be used in real-world structural health monitoring (SHM) applications for damage detection by identifying changes in stiffness of the monitored structural member.

scholarly journals Вплив параметрів адитивного формування на електричні властивості графітонаповненого композиту на основі полілактиду

2021 ◽  
Vol 150 (5) ◽  
pp. 93-102
Author(s):  
Н. В. Сова ◽  
О. О. Слепцов ◽  
Т. Р. Федорів ◽  
А. О. Мартиненко ◽  
М. Р. Кудлай ◽  
...  
Keyword(s):  
Electrical Properties ◽  
3D Printing ◽  
Electrical Resistance ◽  
Specific Resistance ◽  
Polymer Melt ◽  
Electrical Characteristics ◽  
Additive Production ◽  
Filled Composite ◽  
Printing Parameters ◽  
Bulk Electrical Resistance

Purpose. Investigate the effect of additive formation parameters on the properties of an antistatic composition based on polylactide (PLA). Methodology. Surface and bulk electrical resistance were determined by ASTM D257. Findings. The influence of additive formation parameters on the electrical properties of graphite-filled composite based on polylactide has been studied. It was found that the value of resistivity significantly depends on the printing conditions, namely the temperature, speed, thickness of the layer. Increasing the printing temperature helps to reduce the resistivity of the sample. Reducing the thickness of the polymer layer also reduces the resistivity at a print speed within 3000 mm / min It was found that the specific electrical characteristics are significantly different in the plane of the sample in contact with the printing platform. Concentric method of laying layers of polymer melt is less effective in terms of resistivity than mutually perpendicular. It was found that the electrical resistivity of samples made of material for 3D printing, which was previously subjected to drying below the resistance of the sample made of undried material. The programmed change of 3D printing parameters allows to control the specific resistance of graphite-filled composite based on polylactide in the range of three orders and to obtain products with properties from antistatic to statically dissipative materials. Additive production allows to obtain products of the desired configuration with adjustable electrical properties. Originality. The peculiarities of the change of antistatic properties of the polymer composite depending on the conditions of additive formation of experimental samples are investigated. Depending on the applied parameters of additive molding, it is possible to obtain products with properties from antistatic to statically dissipative materials. Practical value. Technological modes of additive molding of composite products based on polylactide and graphite have been developed. Energy consumption for additive formation of products of different mass is estimated.

scholarly journals XIV. On the specific resistance of mercury

1888 ◽  
Vol 179 ◽  
pp. 351-376 ◽  
Keyword(s):  
Cross Section ◽  
Electrical Resistance ◽  
Specific Resistance ◽  
Silver Wire ◽  
Tabular Form ◽  
Cavendish Laboratory

Of late years several determinations of the electrical resistance of mercury have been made, and the differences between the results arrived at have been greater than would be expected at first sight from the nature of the observations involved. The results of the experiments have been expressed either in terms of the ohm (10 9 absolute C. G. S. units) or of the B. A. unit, which, according to the determinations of Lord Rayleigh and one of the authors of this paper (R. T. G.), is equal to ·98667 ohm. In the case of Lord Rayleigh’s observations, a direct comparison was made between the mercury unit and the original B. A. standards. Other observers have constructed copies of their mercury resistances in German-silver wire, which have been compared with the B. A. standards at the Cavendish Laboratory by one of us, or have compared their tubes directly with copies in platinum-silver wire of the B. A. units which have been sent from Cambridge after careful testing. The result of these various comparisons of recent years is as follows, and may conveniently be put in tabular form, giving the value in B. A. units of the resistance of a column of mercury 1 metre long, 1 square millimetre in cross section, at 0° Centigrade.

Optimization of alkali treatment condition on jute fabric for the development of rigid biocomposite

2016 ◽  
Vol 47 (5) ◽  
pp. 640-655 ◽  
Author(s):  
Ammayappan Lakshmanan ◽  
Rakesh Kumar Ghosh ◽  
Swati Dasgupta ◽  
Sujay Chakraborty ◽  
Prasanta Kumar Ganguly
Keyword(s):  
Mechanical Properties ◽  
Sodium Hydroxide ◽  
Treatment Condition ◽  
Alkali Treatment ◽  
Compression Moulding ◽  
Fabric Reinforcement ◽  
Jute Fabric ◽  
Liquor Ratio ◽  
Jute Fabrics ◽  
Sodium Hydroxide Treatment

Jute fiber has poor compatibility with hydrophobic thermosetting polymeric resin for the development of a biocomposite. In this present study, plain weave jute fabric was treated with 1% sodium hydroxide (owf) in three different time (30, 60 and 90 minutes), temperature (30, 40 and 50℃) and material-to-liquor ratio (1:5, 1:10 and 1:15) as per orthogonal array and the treated jute fabrics were used for the preparation of the biocomposite sheet by hand laying-cum-compression moulding method. Developed biocomposite sheets were evaluated for their mechanical properties as per ASTM standards and results were analyzed by Taguchi model to optimize the sodium hydroxide treatment condition. Results inferred that jute fabric reinforcement treated with 1% sodium hydroxide at 50℃ for 60 minutes in 1:10 material-to-liquor ratio could be the optimum condition to develop the biocomposite sheet with higher mechanical properties than other conditions.

Cross Property Correlations for Metals Subjected to Fatigue Damage Accumulation

2002 ◽  
Author(s):  
Mahesh C. Bogarapu ◽  
Igor Sevostianov
Keyword(s):  
Electrical Resistance ◽  
Damage Accumulation ◽  
Fatigue Tests ◽  
Electric Resistance ◽  
Metal Structures ◽  
Accumulated Damage ◽  
Fatigue Damage Accumulation ◽  
Theoretical Predictions ◽  
Method Of Evaluation ◽  
Better Than

A new method of evaluation of elastic property deterioration due to accumulated damage is suggested and experimentally verified. It is based on the explicit correlations between two groups of anisotropic properties – conductivity and elasticity, recently established for porous/microcracked materials with anisotropic microstructures. An experimental study of fatigue has been done to verify the theoretical predictions. The electrical resistance and Young’s modulus are measured as functions of the number of loading cycles in the standard fatigue tests. The agreement between the theoretical predictions and the direct experimental data is better than 10% in all cases. The results allow one to use the measurement of electric resistance to estimate the damage accumulated in metal structures and decrease in the elastic modulus.

Surface treatments of jute fabric: The influence of surface characteristics on jute fabrics and mechanical properties of jute/polyester composites

2012 ◽  
Vol 35 (1) ◽  
pp. 22-30 ◽  
Author(s):  
Kutlay Sever ◽  
Mehmet Sarikanat ◽  
Yoldaş Seki ◽  
Gökhan Erkan ◽  
Ümit Halis Erdoğan ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Surface Characteristics ◽  
Surface Treatments ◽  
Jute Fabric ◽  
Polyester Composites ◽  
Jute Fabrics

Thermo-Electro-Mechanical Shakedown Response of Conditioned Shape Memory Alloy Wires

2009 ◽  
Author(s):  
Christopher B. Churchill ◽  
John A. Shaw
Keyword(s):  
Electrical Resistivity ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Electrical Resistance ◽  
Maximum Stress ◽  
Gauge Length ◽  
Temperature Uniformity ◽  
Constant Tension ◽  
Rapid Temperature ◽  
Temperature Rate

The shakedown response of conditioned shape memory alloy wires (Flexinol®) is examined experimentally during constant tension thermal cycles, at several load levels. Strain, temperature, and electrical resistivity are measured simultaneously using a specialized experimental setup that enables a relatively rapid temperature rate (1 °C/s) while preserving the temperature uniformity along the gauge length to less than 1.5 °C. Both elongation and electrical resistance are measured from the same local gauge length, allowing strain-corrected electrical resistivity to be inferred. The most repeatable behavior (least shakedown) occurs at the intermediate load of 191 MPa (consistent with the supplier’s maximum stress recommendation), with a small amount of shakedown (and some loss of two-way shape memory) at lower loads and progressively larger shakedown (strain ratcheting and reduction in hysteresis) at higher loads.

Analysis of electrical, thermal and compressive properties of alkali-treated jute fabric reinforced composites

2017 ◽  
Vol 47 (6) ◽  
pp. 1407-1423 ◽  
Author(s):  
S Sudha ◽  
G Thilagavathi
Keyword(s):  
Thermal Conductivity ◽  
Compression Strength ◽  
Alkali Treatment ◽  
X Ray Diffraction ◽  
Compression Moulding ◽  
Scanning Calorimetry ◽  
Jute Fabric ◽  
Treatment Conditions ◽  
Jute Fabrics ◽  
Optimized Treatment

The effect of alkali treatment on thermal, electrical and compressive behaviour of jute composite has been studied. The plain woven jute fabrics were manufactured using handloom. The manufactured fabrics were treated with alkali at the optimized treatment conditions of 5% NaOH for 4 h at 30℃ made into a composite of [0°]4 lay-up sequence by means of compression moulding technique using vinyl ester resin. The improvement in the crystallization of the alkali-treated jute fabric was characterized using differential scanning calorimetry and X-ray diffraction technique. The composites were characterized for compression strength, thermal conductivity and electrical resistance properties. It is observed from the results that the alkali-treated jute composites showed increased compression strength, electrical conductivity and thermal conductivity of the composites. This may be due to the better adhesion of the fabric–matrix interface with the removal of lignin and hemicelluloses that impart hydrophobicity on the fabric.

Sign in / Sign up

Export Citation Format

Share Document