scholarly journals ANALISIS MODAL DAN HARMONIK SEBUAH RANCANGAN FIXTURE UJI VIBRASI UNIVERSAL MENGGUNAKAN METODE ELEMEN HINGGA

Technologic ◽  
2021 ◽  
Vol 12 (2) ◽  
Author(s):  
Mikhael Gilang Pribadi Putra Pratama ◽  
Muksin Muksin ◽  
Yusuf Giri Wijaya ◽  
Nur Mufidatul Ula
Keyword(s):  
Device Under Test ◽  
Al 6061

Fixture uji vibrasi harus dapat memegang device under test (DUT) selama proses pengujian dan sesuai dengan kondisi aslinya. Umumnya fixture uji vibrasi yang dibuat harus sesuai dengan geometri DUT. Oleh karena fixture uji vibrasi dibuat secara khusus untuk DUT tertentu, maka hal ini membuat proses uji vibrasi menjadi panjang alurnya dan lama pelaksanaannya. Selain itu, hal tersebut juga menyebabkan tingginya biaya untuk pembuatan fixture baru. Salah satu solusi dari masalah ini adalah dengan membuat fixture uji vibrasi yang bersifat universal. Fixture uji vibrasi yang bersifat universal dirancang mampu digunakan untuk hampir semua bentuk DUT. Fixture tersebut akan digunakan pada pengujian kategori S standar DO-160G section vibrasi yang memiliki rentang pengujian 5-500 Hz sehingga harus memiliki frekuensi natural di atas 500 Hz. Dalam studi ini dilakukan analisis sebuah rancangan fixture uji vibrasi yang bersifat universal mengunakan metode elemen hingga. Analisis dilakukan untuk fixture uji vibrasi universal berukuran 600 mm x 600 mm menggunakan metode analisis modal dan harmonik pada rentang frekuensi 5 Hz - 2000 Hz, kemudian dilakukan analisis kemampuan aktual sistem uji vibrasi berdasarkan massa fixture. Dua jenis material yaitu paduan aluminium dan paduan magnesium digunakan dalam studi ini. Hasil studi menunjukkan bahwa performa fixture yang menggunakan material Al 6061 tidak jauh berbeda dengan material Mg. Frekuensi natural yang diperoleh untuk fixture bermaterial Al 6061 adalah 975.94 Hz sedangkan untuk material paduan Mg adalah 996.88 Hz dengan selisih sebesar 2.14%, keduanya memenuhi kebutuhan pengujian vibrasi DO-160G kategori S. Analisis harmonik menghasilkan perbedaan amplitudo respon yang tidak signifikan yaitu di bawah 0.6‰. Fixture bermaterial logam paduan Mg lebih ringan daripada material Al 6061 sehingga menghasilkan kemampuan aktual sistem uji vibrasi yang lebih tinggi. Logam paduan Mg dipilih menjadi kandidat utama material fixture uji vibrasi universal yang akan dimanufaktur karena mampu menghasilkan kemampuan aktual sistem uji vibrasi yang lebih tinggi.

An appraisal of characteristic mechanical properties and microstructure of friction stir welding for Aluminium 6061 alloy – Silicon Carbide (SiCp) metal matrix composite

2019 ◽  
Vol 13 (4) ◽  
pp. 5804-5817
Author(s):  
Ibrahim Sabry
Keyword(s):  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Welded Joint ◽  
Rotation Speed ◽  
Fusion Welding ◽  
Friction Stir ◽  
Al 6061

It is expected that the demand for Metal Matrix Composite (MMCs) will increase in these applications in the aerospace and automotive industries sectors, strengthened AMC has different advantages over monolithic aluminium alloy as it has characteristics between matrix metal and reinforcement particles.  However, adequate joining technique, which is important for structural materials, has not been established for (MMCs) yet. Conventional fusion welding is difficult because of the irregular redistribution or reinforcement particles.  Also, the reaction between reinforcement particles and aluminium matrix as weld defects such as porosity in the fusion zone make fusion welding more difficult. The aim of this work was to show friction stir welding (FSW) feasibility for entering Al 6061/5 to Al 6061/18 wt. % SiCp composites has been produced by using stir casting technique. SiCp is added as reinforcement in to Aluminium alloy (Al 6061) for preparing metal matrix composite. This method is less expensive and very effective. Different rotational speeds,1000 and 1800 rpm and traverse speed 10 mm \ min was examined. Specimen composite plates having thick 10 mm were FS welded successfully. A high-speed steel (HSS) cylindrical instrument with conical pin form was used for FSW. The outcome revealed that the ultimate tensile strength of the welded joint (Al 6061/18 wt. %) was 195 MPa at rotation speed 1800 rpm, the outcome revealed that the ultimate tensile strength of the welded joint (Al 6061/18 wt.%) was 165 MPa at rotation speed 1000 rpm, that was very near to the composite matrix as-cast strength. The research of microstructure showed the reason for increased joint strength and microhardness. The microstructural study showed the reason (4 %) for higher joint strength and microhardness.  due to Significant   of SiCp close to the boundary of the dynamically recrystallized and thermo mechanically affected zone (TMAZ) was observed through rotation speed 1800 rpm. The friction stir welded ultimate tensile strength Decreases as the volume fraction increases of SiCp (18 wt.%).

Experimental Investigations on Friction Welding of AL 6061 and SS 304

2010 ◽  
Vol 43 (2) ◽  
pp. 25
Author(s):  
Ishtiaq Ahmed Khan ◽  
Ravinder Reddy ◽  
ACS Kumar ◽  
Yatin Tambe
Keyword(s):  
Friction Welding ◽  
Experimental Investigations ◽  
Al 6061 ◽  
Ss 304

scholarly journals EVALUATION OF THE PROPERTIES OF Al-6061 ALLOY REINFORCED WITH PARTICULATE WASTE GLASS

2021 ◽  
pp. e00812
Author(s):  
Adeolu Adesoji Adediran ◽  
Abayomi Adewale Akinwande ◽  
Oluwatosin Abiodun Balogun ◽  
Olanrewaju Seun Adesina ◽  
Adeniyi Olayanju ◽  
...  
Keyword(s):  
Waste Glass ◽  
Al 6061

Analysis of mechanical behavior of Al 6061 metal matrix with boron carbide and graphite

2021 ◽  
Author(s):  
SM. Sutharsan ◽  
P. Senthilkumar ◽  
B. Koodalingam ◽  
U. Nattarselvi ◽  
K. Murali Kumar ◽  
...  
Keyword(s):  
Boron Carbide ◽  
Mechanical Behavior ◽  
Metal Matrix ◽  
Al 6061

Insight to the evolution of Nano Precipitates by Cryo Rolling plus Warm Rolling and their effect on Mechanical Properties in Al 6061 alloy

2021 ◽  
pp. 141072
Author(s):  
Maruff Hussain ◽  
P. Nageswara rao ◽  
Dharmendra Singh ◽  
R. Jayaganthan ◽  
Sunkulp Goel ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Warm Rolling ◽  
Al 6061

scholarly journals Optimised calibration programmes for comparators for instrument transformers

2021 ◽  
Vol 88 (2) ◽  
pp. 122-131
Author(s):  
Christian Mester
Keyword(s):  
Experimental Study ◽  
Operating Principle ◽  
Device Under Test ◽  
Operating Range ◽  
Ratio Error ◽  
Phase Displacement ◽  
Instrument Transformers ◽  
Instrument Transformer ◽  
Method Of Measurement

Abstract Traditionally, instrument transformers are calibrated using bridges. By definition, bridges use the null method of measurement. The traditional calibration programme for instrument transformer bridges characterise namely this null measurement. Many new commercial comparators for instrument transformer use a very different method. They sample the secondary signals of reference and device under test (dut) transformer independently. Based on the samples, magnitude and phase of both signals are determined. Ratio error and phase displacement are calculated. Consequently, the significance of their calibration using the traditional calibration programme is limited. Moreover, the operating range of modern comparators is much larger than that of bridges. The additional versatility cannot be used without an adapted calibration programme. This article analyses the calibration programmes for both technologies. An experimental study confirms both the suitability of the new calibration programme and the need to chose the calibration programme depending on the technology of the device to be calibrated. The conclusion is very general and applies to all measurement problems where an operating principle is replaced by another – when changing the operating principle, it is important to check the calibration programme and adapt it if necessary.

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