Kemampuan Induktansi pada Material Inti Logam Induktor Besi Cor ASTM A48, Nichrome dan Monel Alloy 400 Terhadap Variasi Input Listrik dan Lilitan

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Vera Pangni Fahriani ◽  
Reza Setiawan ◽  
Suciani Rahma Pertiwi
Keyword(s):  
Electronic Device ◽  
Experimental Tests ◽  
Experimental Methods ◽  
Core Material ◽  
Metal Core ◽  
Metallic Core ◽  
Voltage Variation ◽  
Indicator Variables ◽  
Working Frequency ◽  
Metal Materials

Inductor with a metal core is a component which  is almost always present in the daily  electronic device known to us . To further prove the potential  of the proposed new metalcore material, it is necessary to test the voltage variation, winding, and frequency in the inductor with the newly proposed metallic core material. The research method uses experimental methods. Three basic metal materials were used in the experiment, those are Cast Iron ASTM A48 (C 3.4%, Mn 0.5%, Si 1.8%,), Nicromine (Ni 80%, Cr 20%), Monel Alloy 400 (Ni 63%, Cu 31.7%, C 0.3%, Fe 2.5%, Si 0.5%, Mn 2%, S 0.024%). Experimental tests on these new types of metal were also carried out under various stress, winding, and working frequency conditions. The voltage variation selected is 4.5 V - 24 V,  the winding variations and frequencies selected are 150 to  1000 turns and 50 Hz. The  greatest inductance was obtained from ASTM A48, Fe, Monel Alloy 400, Nikromic, and without metallic core on the specified indicator variables. As the voltage increases and the number of turns increases,  the inductance value increases.

scholarly journals Experimental Methods for Measuring the Viscous Friction Coefficient in Hydraulic Spool Valves

2021 ◽  
Vol 13 (13) ◽  
pp. 7174
Author(s):  
Massimo Rundo ◽  
Paolo Casoli ◽  
Antonio Lettini
Keyword(s):  
Friction Coefficient ◽  
Viscous Friction ◽  
Experimental Tests ◽  
Experimental Methods ◽  
Displacement Transducer ◽  
A Posteriori ◽  
Displacement Control ◽  
Spool Valves ◽  
The University ◽  
Good Agreement

In hydraulic components, nonlinearities are responsible for critical behaviors that make it difficult to realize a reliable mathematical model for numerical simulation. With particular reference to hydraulic spool valves, the viscous friction coefficient between the sliding and the fixed body is an unknown parameter that is normally set a posteriori in order to obtain a good agreement with the experimental data. In this paper, two different methodologies to characterize experimentally the viscous friction coefficient in a hydraulic component with spool are presented. The two approaches are significantly different and are both based on experimental tests; they were developed in two distinct laboratories in different periods of time and applied to the same flow compensator of a pump displacement control. One of the procedures was carried out at the Fluid Power Research Laboratory of the Politecnico di Torino, while the other approach was developed at the University of Parma. Both the proposed methods reached similar outcomes; moreover, neither method requires the installation of a spool displacement transducer that can significantly affect the results.

scholarly journals An Effective Method of Modeling the Deformation Behavior of Polymer Sandwich Structures with Adhesive Joints

2021 ◽  
Author(s):  
László Takács ◽  
Ferenc Szabó
Keyword(s):  
Deformation Behavior ◽  
Sandwich Structures ◽  
Experimental Tests ◽  
Mechanical Tests ◽  
Adhesive Joints ◽  
Core Material ◽  
Full Vehicle ◽  
Novel Approach ◽  
Stiffness Matrices ◽  
Layered Shells

AbstractPolymer sandwich structures have high bending stiffness and strength and also low weight. Therefore, they are widely used in the transportation industry. In the conceptual design phase, it is essential to have a method to model the mechanical behavior of the sandwich and its adhesive joints accurately in full-vehicle scale to investigate different structure partitioning strategies. In this paper, a novel approach using finite element modeling is introduced. The sandwich panels are modeled with layered shells and the joint lines with general stiffness matrices. Stiffness parameters of the face-sheets and the core material are obtained via mechanical tests. Stiffness parameters of the joints are determined by using the method of Design of Experiments, where detailed sub-models of the joints serve as a reference. These models are validated with experimental tests of glass-fiber reinforced vinyl ester matrix composite sandwich structure with a foam core. By using two joint designs and three reference geometries, it is shown that the method is suitable to describe the deformation behavior in a full-vehicle scale with sufficient accuracy.

scholarly journals Masking Conventional Metallic Cast Post for Enhancing Esthetics

2016 ◽  
Vol 6 (1) ◽  
pp. 85-89 ◽  
Author(s):  
Jyoti B Nadgere ◽  
Naisargi P Shah ◽  
Amit Mahadeo Gaikwad
Keyword(s):  
Case Report ◽  
Metal Core ◽  
Metallic Core ◽  
Tooth Structure ◽  
Custom Made ◽  
All Ceramic ◽  
Post And Core ◽  
Ceramic Restorations ◽  
Labial Surface ◽  
Metal Post

ABSTRACT Loss of tooth structure occurs due to caries, endodontic treatment, or fracture caused by trauma; restoring these teeth is difficult task for a clinician. Post and core is an option for teeth when excessive tooth structure is lost and teeth need to be restored with crown and bridge procedure. They can be prefabricated post with composite built up or a one-piece custom-made post. The custom-made cast metal post and core have disadvantage due to their color that imparts grayish hue to overlying ceramic restorations. Masking the metal core can enhance the esthetic of all ceramic restorations that are placed over the cast post and core. A case report is being presented where the metallic core was masked with ceramic built up on labial surface of metal core. How to cite this article Shah NP, Gaikwad AM, Ram SM, Nadgere JB. Masking Conventional Metallic Cast Post for Enhancing Esthetics. J Contemp Dent 2016;6(1):85-89.

scholarly journals Vibration, synchronization and localization of three-bladed rotor: theoretical and experimental studies

2021 ◽  
Author(s):  
Z. Szmit
Keyword(s):  
Experimental Studies ◽  
Experimental Tests ◽  
Experimental Methods ◽  
Forced Response ◽  
Governing Equations ◽  
Complex Dynamic ◽  
Flexible Beams ◽  
Free And Forced Vibrations ◽  
Bladed Rotor ◽  
Rotating Structure

AbstractNumerical and experimental methods in free and forced vibrations of the rotating structure consisting of the rigid hub and three flexible beams are considered. Firstly, the system of four mutually coupled dimensionless differential governing equations is presented and then forced response of the system as well as synchronization phenomenon are investigated. Next, the finite elements method is used to design the rotating structure and analyse complex dynamic response. During the numerical calculations symmetric, as well as de-tuned rotor are analyzed. Finally, results obtained from ordinary differential equations and numerical simulations are compared with experimental tests.

Taguchi Analysis of the Effect of Process Parameters in Friction Stir Welding

2010 ◽  
Vol 636-637 ◽  
pp. 1150-1156 ◽  
Author(s):  
Rui Louro ◽  
Carlos Leitão ◽  
Helena Gouveia ◽  
Altino Loureiro ◽  
Dulce Maria Rodrigues
Keyword(s):  
Friction Stir Welding ◽  
Taguchi Method ◽  
Welding Process ◽  
Experimental Tests ◽  
Experimental Methods ◽  
Butt Joint ◽  
Welding Parameters ◽  
Published Data ◽  
Friction Stir ◽  
Friction Stir Welding Process

The task of obtaining suitable welding parameters for the friction stir welding process is often a difficult one, due to the lack of published data and the fact that the exact mechanism by which the process operates has not yet been fully determined. Therefore, suitable welding parameters often need to be obtained by using extensive, time consuming and expensive experimental methods. The work detailed in this paper pertains to the use of the Taguchi method as a mean to reduce the disadvantages of these experimental methods, more specifically, their cost. The Taguchi method accomplishes this task by substantially reducing the number of welding trials that are needed to obtain suitable welding parameters. This reduction leads to the parameters being obtained more rapidly and at a substantially smaller cost. In this paper a procedure for applying the Taguchi method to the friction stir welding process is presented as well as its application to the welding of a specific component. The method was applied to the welding of 4mm thick AA5083-H111 plates in a butt joint configuration, which constitutes one of the most common industrial welding scenarios. The purpose of the experimental tests was to maximize the welding speed whilst ensuring an acceptable welding quality. The quality of the welds was determined through visual inspection and tensile and bending tests. The application of the Taguchi method allowed, with a relatively small number of experimental welds, to provide some insight into the manner by which the parameters should be altered in order to optimize the process.

Dynamic characteristics of sandwich composite with debonding

2018 ◽  
Vol 32 (9) ◽  
pp. 1204-1223
Author(s):  
M Idriss ◽  
A El Mahi
Keyword(s):  
Finite Element ◽  
Dynamic Characteristics ◽  
Flexural Vibration ◽  
Experimental Tests ◽  
Core Material ◽  
Sandwich Composite ◽  
Dissipated Energy ◽  
Stress And Strain ◽  
Sandwich Composites ◽  
Modal Strain Energy

The article presents the results of experimental and finite element analyses of the flexural vibration behavior sandwich composite with different debonding ratios. Sandwich composite consists of two thin skins composed of E-glass fiber and epoxy resin bonded to lightweight and weaker core material of PVC foams. Experimental tests using the impulse technique were performed on the sandwich constituents and sandwich composites with different debonding lengths. The modal dynamic characteristics of sandwich composite were measured and discussed for each debonding ratio. A finite element modeling was used to determine the natural frequencies, modal shapes, and stress and strain fields for each element of sandwich composites for each debonding ratio. The modal strain energy approach was used to determine the contribution of energies dissipated of the core and the skins in the total dissipated energy and the global damping of the different sandwich composites. The results obtained by this approach are compared with those obtained experimentally.

Micromechanics of Longitudinal Mechanical Properties for Active Fiber Composites With Embedded Metal-Core Piezoelectric Fibers

Aerospace ◽  
2005 ◽  
Author(s):  
Mehrdad N. Ghasemi Nejhad ◽  
Davood Askari
Keyword(s):  
Mechanical Properties ◽  
Fiber Composite ◽  
Transversely Isotropic ◽  
Fiber Composites ◽  
Core Material ◽  
Metal Core ◽  
Element Analysis ◽  
Active Fiber ◽  
Active Fiber Composites ◽  
Piezoelectric Fiber

An analytical micromechanics approach is presented to model the effective longitudinal mechanical properties of Metal-Core Piezoelectric Fibers (MPF). The model assumes general orthotropic material properties for the piezoelectric as well as the core material. Next, the general orthotropic solution is reduced to transversely isotropic for the piezoelectric fiber and isotropic for the metal-core. This MPF system is also modeled using finite element analysis (FEA) and the results from the analytical solution and FEA are compared for verification purpose. Next, the Metal-Core Piezoelectric Fiber (MPF) is embedded inside a metal or a polymer and the resulting longitudinal mechanical properties of these Active Fiber Composite (AFC) systems are given analytically.

Comparison on Compressive Behaviour of Aluminium Honeycomb and Titanium Alloy Micro Lattice Blocks

2011 ◽  
Vol 462-463 ◽  
pp. 213-218 ◽  
Author(s):  
Rafidah Hasan ◽  
Robert A.W. Mines ◽  
Eva Shen ◽  
Sozohn Tsopanos ◽  
Wesley Cantwell
Keyword(s):  
Titanium Alloy ◽  
Compression Strength ◽  
Structural Design ◽  
Lattice Structure ◽  
Experimental Tests ◽  
Core Material ◽  
Aerospace Application ◽  
Compressive Behaviour ◽  
Sandwich Construction

The paper discusses the compressive behaviour of two materials, the conventional aluminium honeycomb and the new titanium alloy micro lattice blocks. The new titanium alloy micro lattice structure is being developed as core material candidate in sandwich construction for aerospace application. Experimental tests have been done on the blocks in order to compare its property with the aluminium honeycomb. Compression strength as well as compressive behaviour of both materials are compared and observed. The mechanisms that contributed to the differences in their performance are discussed and this will be used to improve the geometrical and structural design of micro lattice structure in order to achieve properties that are superior or at least comparable with that of aluminium honeycomb.

scholarly journals Rogowski Coils for Design of Energy Meters for Nigeria Power Market

2020 ◽  
Vol 5 (6) ◽  
pp. 626-631
Author(s):  
John Paul I. Iloh
Keyword(s):  
Electricity Consumption ◽  
Power Market ◽  
Experimental Tests ◽  
Rogowski Coil ◽  
Core Material ◽  
Sensing Element ◽  
Current Sensing ◽  
Billing System ◽  
Energy Meter ◽  
Rogowski Coils

Proper metering of electricity consumption is the optimal way for effectively recovering revenues for power supplied to the consumers by the distribution companies (DISCOs). In Nigeria, the situation is quite problematic due to inadequate metering of the consumers. As a result, huge amount of revenues due to the DISCOs are left uncollected leaving the DISCOs to resort to estimated billing system. To solve this problem, this paper proposes a locally made digital energy meter built from locally available materials in Nigeria. Specifically, this work proposes to use an inexpensive rogowski coil wound from made-in-Nigeria wire on an improvised air core material as the current sensing element to be used in the meter. Two rogowski coil samples wound from SWG 36 and SWG 25 wires having resistances of 50ohm and 1.3 Ohms respectively were subjected to repeated experimental tests in order to study their characteristic behavior under varying load current scenarios. The results obtained were used to characterize the coils behaviors by using the basic fitting tool in MATLAB graphing window to generate the optimal equation representing the coils’ behaviors.  The equations so obtained are intended to be used to program the microcontroller for implementation of the Digital Energy Meter algorithm adopted in the proposed design. Results from the experiment showed that the coil with lower resistance exhibited better linear response while the coil with higher resistance was better optimized by quadratic and cubic polynomials. These findings serve as design guide for local fabrication of the rogowski coils to be used in the proposed digital energy meter being developed for the Nigerian power market.

scholarly journals THE EFFECT OF INNER DIAPHRAGMS AND NON-CONTINUOUS SILL SECTION ON THE STIFFNESS OF AUTOMOTIVE B-PILLAR

2017 ◽  
Vol 25 (1) ◽  
pp. 117-128
Author(s):  
C.F. Tan ◽  
S.A. Shamsuddin ◽  
M.H. Shafie
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Experimental Tests ◽  
Experimental Methods ◽  
Element Analysis ◽  
Specific Loading ◽  
The Finite Element Analysis

The paper discusses the knowledge on the behaviour of T-frame under specific loading will be obtained by experimental methods in order to investigate the deflection of the vehicle B-pillar or T-frame. In addition, a series of T-frame were designed with inner diaphragm at various location in the sill member in order to investigate the effect of inner diaphragm and noncontinuous closed hat section in the sill member. Lastly, the results from the experimental tests were compared with the finite element analysis results to demonstrate the effectiveness of the inner diaphragm in the automotive B-pillar.  

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