scholarly journals Analisa pengaruh media pendingin dan arus listrik pada proses pengelasan titik (spot welding) stainlees steel terhadap nilai kekuatan tarik

2021 ◽  
Vol 2 (2) ◽  
pp. 94-99
Author(s):  
Tri Cahyo Wahyudi ◽  
Sulis Dri Handono ◽  
Hendi Ahmad Sanjaya ◽  
Abdul Basir Sulaiman Azis
Keyword(s):  
Tensile Strength ◽  
Yield Strength ◽  
Spot Welding ◽  
Testing Machine ◽  
Lap Joint ◽  
Steel Aisi ◽  
Aisi 316

Pengelasan adalah salah satu teknik penyambungan logam dengan cara mencairkan sebagian logam induk dan logam pengisi dengan tekanan dan dengan atau tanpa logam penambah sehingga menghasilkan sambungan las yang kontiyu. Media pendingin dan arus listrik pada proses pengelasan ini sangat mempengaruhi hasil pengelasan. Lap joint adalah salah satu jenis sambungan las yang ada pada las titik yaitu jenis sambunga tumpuk. Penelitian ini menggunakan plat baja Stainlees Steel AISI 316. Tujuan dari penelitian ini adalah untuk mengetahui kekuatan tarik dan jenis pendingin dengan arus berapa yang paling optimal untuk diberikan pembebanan tarik. Untuk waktu pengelasan disamakan  yaitu 2 detik dan untuk parameter  yang digunakan adalah media pendingin air biasa, air garam, air mineral dan variasi arus 660 Ampere, 880 Ampere dan 1100 Ampere. Pengujian yang dilakukan adalah pengujian tarik menggunakan alat Ultimate Testing Machine. Pada hasil pengujian didapat bahwa jenis sambungan lap joint yang paling optimum untuk diberikan pembebanan tarik dari nilai yield strength yaitu  pendingin air biasa pada arus 1100 Ampere sebesar 159,17 kg/mm2, tensile strength dengan  pendingin air mineral pada Arus 1100 Ampere sebesar 195,92 kg/mm2, dan nilai elongation dengan pendingin air mineral pada arus 1100 Ampere sebesar 11.19%.

Measurement of Dynamic Stress and Strain in Tensile Test Specimens

1944 ◽  
Vol 11 (2) ◽  
pp. A65-A71
Author(s):  
R. O. Fehr ◽  
E. R. Parker ◽  
D. J. DeMicheal
Keyword(s):  
Tensile Strength ◽  
Yield Strength ◽  
Testing Machine ◽  
Impact Testing ◽  
High Rate ◽  
Stress And Strain ◽  
Dynamic Tensile Strength ◽  
Dynamic Yield Strength ◽  
Dynamic Yield ◽  
Cold Rolled

Abstract In the investigation detailed in this paper, the tensile strength, the yield strength, and the breakage energy of test specimens (cold-rolled steel and dural) were measured while the specimens were being broken by a force applied at a high rate of speed in a commercial high-velocity impact-testing machine. The dynamic tensile strength, the dynamic yield strength and the dynamic breakage energy were found to be higher than the static values up to the maximum impact velocities of these tests (100 fps). The paper contains: (1) A presentation of some results of these tests. (2) A description of the technique used. (3) A description of the analysis used.

Evaluating the Strength of the Friction Stir Welded Joints at Various Rotational Speeds

2013 ◽  
Vol 446-447 ◽  
pp. 312-315
Author(s):  
Ramaraju Ramgopal Varma ◽  
Abdullah Bin Ibrahim ◽  
B. Ravinder Reddy
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Friction Stir Welding ◽  
Yield Strength ◽  
Welded Joints ◽  
Rotational Speed ◽  
Testing Machine ◽  
Friction Stir ◽  
Universal Testing ◽  
Welding Technique

The present research paper aims in evaluating the strength of the welded AA6351 alloy plates of 6 mm thick by using friction stir welding technique at different rotational speeds The applied welding technique is capable of achieving the mechanical properties of the alloy close to that of the original alloy. In the present investigation, the speeds of the spindle were varied from 1100 rpm to 1500 rpm with a constant transverse speed of 20 mm/min. The tensile strength of the joints is determined by an universal testing machine. The results from the present investigation show that the values of the yield strength were very much closer to the values of the AA6351Alloy prior to welding. It has been found from the experiments that the strength of the joints increases with the increase in the rotational speed; however, the same is decreasing after achieving certain speed.

Experimental Researches on Relation between Martens Hardness and Traditional Mechanical Properties

2012 ◽  
Vol 189 ◽  
pp. 205-209 ◽  
Author(s):  
Wang Yang ◽  
Jing Wang ◽  
Yi Liang Zhang ◽  
Yang Liu
Keyword(s):  
Tensile Strength ◽  
Regression Analysis ◽  
Linear Regression ◽  
Yield Strength ◽  
Vickers Hardness ◽  
Linear Regression Analysis ◽  
Testing Machine ◽  
Mathematic Model ◽  
Rockwell Hardness ◽  
Martens Hardness

For finding the relation between Martens hardness and Vickers hardness, Rockwell hardness, tensile strength, yield strength, research are done on carbon alloy steel by experiment, linear regression analysis and derivation of equation .Martens hardness, Vickers hardness and Rockwell hardness of 30 samples which contains 3 material and 10 hardness levels are tested by ZHU 2.5 hardness tester. On the basis of 180 groups of data obtained and analyzed from instrumented indentation experiments, mathematic model between Martens hardness and Vickers hardness is established, by linear regression analysis. And mathematic model between Martens hardness and Rockwell hardness, tensile strength, yield strength is established on that basis. By means of comparing the value calculated by the mathematic model and obtained from tensile test using Electronic universal testing machine, the accuracy of the mathematic model is verified. The result show that the relative error of the four mathematics models which established in this test is below 5%, and the four mathematics models can be applied to the practical engineering application.

Uniaxial Properties versus Temperature, Creep and Impact Energy of an Austenitic Steel

2017 ◽  
Vol 36 (2) ◽  
pp. 135-143
Author(s):  
Josip Brnic ◽  
Goran Turkalj ◽  
Sanjin Krscanski ◽  
Goran Vukelic ◽  
Marko Canadija
Keyword(s):  
Tensile Strength ◽  
Yield Strength ◽  
Impact Energy ◽  
Creep Resistance ◽  
Testing Machine ◽  
High Yield ◽  
High Yield Strength ◽  
Heat Resistant Steel ◽  
Computer Controlled ◽  
Short Time

AbstractIn this paper, uniaxial material properties, creep resistance and impact energy of the austenitic heat-resistant steel (1.4841) are experimentally determined and analysed. Engineering stress–strain diagrams and uniaxial short-time creep curves are examined with computer-controlled testing machine. Impact energy has been determined and fracture toughness assessed. Investigated data are shown in the form of curves related to ultimate tensile strength, yield strength, modulus of elasticity and creep resistance. All of these experimentally obtained results are analysed and may be used in the design process of the structure where considered material is intended to be applied. Based on these results, considered material may be classified as material of high tensile strength (688 MPa/293 K; 326 MPa/923 K) and high yield strength (498 MPa/293 K; 283 MPa/923 K) as well as satisfactory creep resistance (temperature/stress $ \to $strain (%) at 1,200 min: 823 K/167 MPa $ \to $0.25 %; 923 K/85 MPa $ \to $0.2 %).

scholarly journals Uji Tarik pada Timing Belt Mobil L300

2017 ◽  
Vol 5 (02) ◽  
pp. 69-73
Author(s):  
Jusnita Jusnita ◽  
Indra Saputra
Keyword(s):  
Tensile Strength ◽  
Yield Strength ◽  
Testing Machine ◽  
Material Testing ◽  
Servo Control ◽  
Control Material ◽  
Timing Belt ◽  
Material Testing Machine

Fungsi timing belt pada mesin L300 adalah memindahkan daya dari motor ke crankshaft. Timing belt rentan mengalami kerusakan karena timing belt mengalami gesekan dengan pully. Ada beberapa penyebab kegagalan pada timing belt, seperti : tekanan kerja melebihi dari tekanan kerja timing belt yang diijinkan. Kelemahan rantai timing adalah bunyinya yang kasar sehinga membutuhkan perawatan yang maksimal. Tujuan dari penelitian ini adalah untuk mengetahui kekuatan tarik dari timing belt mobil diesel L 300 menggunakan alat uji tarik. Metode yang digunakan dalam penelitian ini adalah metode pengujian tarik menggunakan alat uji computer servo control material testing machine dengan panjang cekannya (Grif Length) 90 mm dengan membandingkan timing belt original dengan timing belt KW 1. Hasil penelitian untuk spesimen timing belt original merek Genuine Part nilai Mod 156180.34 cm2, max force 16147.2 kgf, 0,2%  79.27439Y.S kgf/cm2,  yield strength 79,27 kgf/cm2, tensile strength 104.75 kgf/cm2, elongation 6,71. Sedangkan untuk spesimen  timing belt KW 1 merek jibox didapat hasil pengujian nilai Mod 46722.70 cm2, max force 5843.2 kgf, 0,2%  27.48854 y.s kgf/cm2,  yield strength 11,21 kgf/cm2, tensile strength 37,90 kgf/cm2, elongation 8,11. material timing belt L 300 merek Genuin Part mengalami putus/gagal terjadi pada tegangan (stres)  82 Mpa dengan regangan 0,01 (10%). Sedangkan untuk material timing belt L 300 merek Jibox menglami putus/gagal pada tegangan 35 Mpa dengan regangan (7%), maka dapat kesimpulan bahwa timing belt merk Genuine part  mempunyai tegangan (stress) 83 Mpa lebih besar dibandingkan dengan material timing belt KW 1 merek Jibox 35 Mpa, sehingga selisih tegangan kedua material tersebut adalah 48 Mpa. Sedangkan untuk  nilai regangannya (strength) pada timing belt merk Geniune Part  adalah 0.01 (10%). Dan untuk  material timing belt KW 1 merk Jibox mempunyai regangan (strength) 0.07 (7%). Maka selisih kedua regangan material timing belt tersebut adalah 0,03 (3%).

Tensile Behaviour of Al5052 Alloy Sheets Annealed at Different Temperatures

2013 ◽  
Vol 845 ◽  
pp. 431-435 ◽  
Author(s):  
V Mugendiran ◽  
A. Gnanavelbabu ◽  
R Ramadoss
Keyword(s):  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Yield Strength ◽  
Sheet Metal ◽  
Tensile Testing ◽  
Elevated Temperatures ◽  
Testing Machine ◽  
Constant Strain Rate ◽  
Tensile Behaviour ◽  
Increase With Increase

With recent development in automotive industries, aluminium alloys have great demand in sheet metal fabrication industries. Sheet metal forming at slightly elevated temperatures is more acceptable in forming operations. The mechanical properties such as yield strength, ultimate tensile strength and percentage of elongation are very influential in determining the formability of sheet metals in various applications. In this paper, tensile property of Al5052 alloy is investigated at constant strain rate under different annealing conditions from room to 350°C. Servo controlled universal testing machine was used for tensile testing. The results of tensile testing indicate that the tensile properties including yield strength, ultimate tensile strength decreases and elongation percentage increases with the increase in annealing temperature. The analysis shows that the formability parameters, strain hardening index and strength coefficient increase with increase in annealing temperatures.

The Effect of Temperature on the Tensile Properties of Steel 0Cr18Ni9

2010 ◽  
Vol 654-656 ◽  
pp. 194-197
Author(s):  
Wei Fen Li ◽  
Wei Niu ◽  
Zhi Ming Hao ◽  
Ming Hai Li
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Elastic Modulus ◽  
Yield Strength ◽  
Tensile Properties ◽  
Tensile Testing ◽  
Testing Machine ◽  
Effect Of Temperature ◽  
Tensile Testing Machine ◽  
Increasing Temperature

Experiments of tensile mechanical properties of steel 0Cr18Ni9 are done on the MTS 810 tensile testing machine, and the temperature range is from 20°C to 1200°C. The stress vs. strain curves are obtained. Results show that the elastic modulus, yield stress and tensile strength decrease with increasing temperature .Based on the experiment results, the functions of the elastic modulus, yield strength and tensile strength versus temperature are represented by polynomial.

scholarly journals ANALISIS PENGARUH KETEBALAN PLAT BAJA KARBON RENDAH DAN LAMA PENEKANAN PADA PENGELASAN TITIK (SPOT WELDING) TERHADAP NILAI KEKUATAN TARIK

2018 ◽  
Vol 7 (1) ◽  
Author(s):  
Eko Nugroho ◽  
Untung Surya Dharma ◽  
Sodik Kurniawan
Keyword(s):  
Spot Welding ◽  
Testing Machine ◽  
Lap Joint

Penggunaan bahan yang standar dan tenaga ahli dalam bidang pengelasan pun menjadi daya tarik tersendiri bagi seorang peneliti untuk mengetahui apa saja yang dibutuhkan dalam pemilihan bahan, teknik pengelasan dan jenis sambungannya. Saat ini pengelasan seolah menjadi tren karena kelebihannya dibandingkan jenis sambungan lainya seperti sambungan baut dan paku keling.Pengelasan adalah proses mencairkan sebagian logam induk dengan tujuan menyambung logam dengan atau tanpa tekanan dan logam pengisi untuk menghasilkan sambungan yang terus menerus. Las titik banyak digunakan di industri besar seperti industri mobil, industri motor dan lain sebagainya. Industri mobil biasanya menggunakan las titik untuk pengerjaan karoseri bodi mobil atau rangka. Pengelasan titik memiliki peranan sangat penting sebagai proses penyambungan dalam industri otomotif, dan setiap kendaraan mengandung 2000 – 5000 lasan titik. Kualitas dan kekuatan lasan titik sangat penting terhadap perancangan umur dan keamanan dari kendaraan. Lap joint adalah salah satu jenis sambungan las yang ada yaitu jenis sambungan tumpuk, dimana kedua benda kerja sejajar satu sama lain dengan catatan salah satu ujung dari kedua benda kerja tersebut berada pada tingkat yang sama. Tujuan dari penelitian ini adalah untuk mengetahui kekuatan tarik dan lama tekan terhadap ketebalan plat yang paling optimal untuk pembebanan tarik. Pengelasan ini menggunakan baja karbon rendah ST 41 dan dengan menggunakan variasi ketebalan plat 0,6 mm, 0,8 mm dan 1 mm dengan lama tekan 1 detik, 2 detik dan 3 detik. Pengujian yang dilakukan adalah peengujian tarik menggunakan mesin UTM (Ultimate Testing Machine). Pada hasil pengujian didapat hasil kekuatan tarik dari masing – masing spesimen, dan terjadi penurunan nilai kekuatan tarik. Untuk kekuatan tarik terbesar rata-rata yang didapat adalah 67,69 N/mm2 pada ketebalan plat 0,6 mm dengan lama tekan 3 detik.Kata Kunci: Lap Joint, Pengelasan, Las Titik, Baja Karbon Rendah, Kekuatan Tarik.

scholarly journals Experimental Investigation of Single Lap Joint on Composite Materials

2021 ◽  
pp. 1304-1309
Author(s):  
S. Rajkumar ◽  
Dr. M. Loganathan ◽  
Dr. R. Venkatesh
Keyword(s):  
Tensile Strength ◽  
Composite Materials ◽  
Testing Machine ◽  
Basalt Fiber ◽  
Lap Joints ◽  
Strength Analysis ◽  
Lap Joint ◽  
Single Lap Joint ◽  
And Performance ◽  
Riveted Lap Joints

To improve the efficiency and performance can be achieved by decreasing the aircraft weight through considerable usage of composite material in primary aircraft structures. In fuselage construction it consist of various structural members such as skin, stringers, frames, bulkheads etc., all fastened together by rivets and bolts. The failure of riveted joint take place when tearing of the plate, shearing of rivets and plate under the action of over load. This project deals with the tensile strength analysis of riveted lap joints of three different composite materials such as Glass fiber, Basalt fiber and Carbon fiber are reinforced with epoxy resins. By using universal testing machine the tensile strength of the riveted single lap joint of three different composite materials are tested experimentally.

Study of Bismuth Telluride Crystal Strength

2019 ◽  
pp. 1-8
Author(s):  
A. A. Gorbatovskiy
Keyword(s):  
Tensile Strength ◽  
Bismuth Telluride ◽  
Elasticity Modulus ◽  
Testing Machine ◽  
Bend Testing ◽  
Instron Testing Machine ◽  
Measurement Results ◽  
Strength Tests ◽  
Semiconductor Properties

The article presents results of strength tests of bismuth telluride prismatic samples obtained by growing crystals. These crystals have semiconductor properties and are used in the heat machines, the run-ability of which largely depends on the strength of crystals. Data available in the literature are significantly different from each other. It has been shown that, the most consistent strength tests results are obtained in case of bend testing. The measurement results of the elasticity modulus and tensile strength are given. For tests, an INSTRON testing machine with maximum direct stress of the 1000 H was used.

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