Effect of Specimen Taper and Machining Processes on Tension Test Results

2009 ◽  
pp. 3-3-18 ◽  
Author(s):  
AK Schmieder
Keyword(s):  
Tension Test ◽  
Test Results ◽  
Machining Processes

Micro Machining of Nonconductive Al2O3 Ceramic on Developed TW-ECSM Setup

2012 ◽  
pp. 167-177
Author(s):  
Alakesh Manna ◽  
Amandeep Kundal
Keyword(s):  
Weight Ratio ◽  
High Hardness ◽  
High Strength ◽  
Ceramic Materials ◽  
Actual Condition ◽  
Test Results ◽  
Machining Performance ◽  
Machining Processes ◽  
Al2o3 Ceramic ◽  
Advanced Ceramic

Advanced ceramic materials are gradually becoming very important for their superior properties such as high hardness, wear resistance, chemical resistance, and high strength to weight ratio. But machining of advanced ceramic like Al2O3-ceramics is very difficult by any well known and common machining processes. Normally, cleavages and triangular fractures generate when machining of these materials is done by traditional machining methods. It is essential to develop an efficient and accurate machining method for processing advanced ceramic materials. For effective machining of Al2O3-ceramics, a traveling wire electrochemical spark machining (TW-ECSM) setup has been developed. The developed TW-ECSM setup has been utilized to machine Al2O3 ceramic materials and subsequently test results are utilized to analyze the machining performance characteristic. Different SEM photographs show the actual condition of the micro machined surfaces. The practical research analysis and test results on the machining of Al2O3 ceramics by developed TWECSM setup will provide a new guideline to the researchers and manufacturing engineers.

Micro Machining of Nonconductive Al2O3 Ceramic on Developed TW-ECSM Setup

2011 ◽  
Vol 1 (2) ◽  
pp. 46-55
Author(s):  
Alakesh Manna ◽  
Amandeep Kundal
Keyword(s):  
Weight Ratio ◽  
High Hardness ◽  
High Strength ◽  
Ceramic Materials ◽  
Actual Condition ◽  
Test Results ◽  
Machining Performance ◽  
Machining Processes ◽  
Al2o3 Ceramic ◽  
Advanced Ceramic

Advanced ceramic materials are gradually becoming very important for their superior properties such as high hardness, wear resistance, chemical resistance, and high strength to weight ratio. But machining of advanced ceramic like Al2O3-ceramics is very difficult by any well known and common machining processes. Normally, cleavages and triangular fractures generate when machining of these materials is done by traditional machining methods. It is essential to develop an efficient and accurate machining method for processing advanced ceramic materials. For effective machining of Al2O3-ceramics, a traveling wire electrochemical spark machining (TW-ECSM) setup has been developed. The developed TW-ECSM setup has been utilized to machine Al2O3 ceramic materials and subsequently test results are utilized to analyze the machining performance characteristic. Different SEM photographs show the actual condition of the micro machined surfaces. The practical research analysis and test results on the machining of Al2O3 ceramics by developed TWECSM setup will provide a new guideline to the researchers and manufacturing engineers.

A Comb Driving Magnetometer Based on Tunnel Effect

2007 ◽  
Vol 121-123 ◽  
pp. 561-564
Author(s):  
Xue Hua Tang ◽  
Zheng You ◽  
Yong Jun Yang ◽  
Hong Tao He
Keyword(s):  
Tunneling Effect ◽  
Tunnel Effect ◽  
Test Results ◽  
Magnetic Signal ◽  
Machining Processes ◽  
Fea Analysis

In this paper, a comb-driving tunneling magnetometer based on the tunneling effect is introduced. The designation, manufacture and tests of this magnetometer are discussed, including its structure, FEA analysis, machining processes and test results. The test results indicate that the chip is coincidental with the tunneling effect and the chip is capable of sensing the magnetic signal.

Re-Examining the Bulge Test: Methods for Improving Accuracy and Reliability

1991 ◽  
Vol 239 ◽  
Author(s):  
Martha K. Small ◽  
Joost J. Vlassak ◽  
William D. Nix
Keyword(s):  
Thin Film ◽  
Mechanical Properties ◽  
Tensile Tests ◽  
Test Methods ◽  
Tension Test ◽  
Bulge Test ◽  
Test Results ◽  
Bulk Materials ◽  
Test Technique ◽  
Improving Accuracy

ABSTRACTSince its first application to thin films in the 1950's, the bulge test has had a prominent place in the field of thin film mechanical properties. The major appeal of the technique is that it is analogous to the familiar uniaxial tension test, which is commonly applied to bulk materials. At the same time, it avoids the sample tearing and alignment problems associated with micro-tensile tests. Unfortunately, bulge test results have been sometimes controversial and difficult to reproduce. In this paper we address possible causes for mese inconsistencies and describe a method by which the bulge test technique can be made to produce accurate and reliable results.

Stress-Stain Response of PVC Geomembrane under Uniaxial Tension Test

2014 ◽  
Vol 936 ◽  
pp. 1582-1586 ◽  
Author(s):  
Hai Min Wu ◽  
Yi Ming Shu
Keyword(s):  
Uniaxial Tension ◽  
True Strain ◽  
Tension Test ◽  
True Stress ◽  
Strain Response ◽  
Test Results ◽  
Stress Strain ◽  
Uniaxial Tension Test ◽  
Engineering Stress ◽  
Photographic Analysis

The mechanical property of polyvinyl chloride (PVC) geomembrane was usually expressed using engineering stress-strain response in traditional uniaxial tension test. By failing to account for deformation of specimen during the test, the deviation of true stress and strain maybe caused from the test results. In this paper, the true stress-strain response of PVC geomembrane was investigated using uniaxial tension test. The photographic analysis method was used to measure axial and lateral true strain of specimen. The Poissons ratio and true stress were also acquired based on measured true strain in the test. Then the true stress-strain relationship was obtained from the test results. By comparing with the engineering stress-strain results expressed by traditional method, it can be found that the engineering stress-strain result is unreasonable. The engineering stress-strain expression easily leads to the underestimation of the true stress.

scholarly journals Improvement of the Machining Performance of the TW-ECDM Process Using Magnetohydrodynamics (MHD) on Quartz Material

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2377
Author(s):  
Ankit D. Oza ◽  
Abhishek Kumar ◽  
Vishvesh Badheka ◽  
Amit Arora ◽  
Manoj Kumar ◽  
...  
Keyword(s):  
Removal Rate ◽  
Gas Bubbles ◽  
Hydrogen Gas ◽  
Test Results ◽  
Machining Performance ◽  
Machining Processes ◽  
Exploratory Investigation ◽  
Industrial Performance ◽  
Quartz Substrates ◽  
Traveling Wire

Many microslits are typically manufactured on quartz substrates and are used to improve their industrial performance. The fabrication of microslits on quartz is difficult and expensive to achieve using recent traditional machining processes due to its hardness, electrically insulating nature, and brittleness. The key objective of the current study was to demonstrate the fabrication of microslits on quartz material through a magnetohydrodynamics (MHD)-assisted traveling wire-electrochemical discharge micromachining process. Hydrogen gas bubbles were concentrated around the entire wire surface during electrolysis. This led to a less active dynamic region of the wire electrode, which decreased the adequacy of the electrolysis process and the machining effectiveness. The test results affirmed that the MHD convection approach evacuated the gas bubbles more rapidly and improved the void fraction in the gas bubble scattering layer. Furthermore, the improvements in the material removal rate and length of the cut were 85.28% and 48.86%, respectively, and the surface roughness was reduced by 30.39% using the MHD approach. A crossover methodology with a Taguchi design and ANOVA was utilized to study the machining performance. This exploratory investigation gives an unused strategy that shows a few advantages over the traditional TW-ECDM process.

DCB test simulation of stitched CFRP laminates using interlaminar tension test results

2009 ◽  
Vol 69 (14) ◽  
pp. 2315-2322 ◽  
Author(s):  
Yutaka Iwahori ◽  
Kozue Nakane ◽  
Naoyuki Watanabe
Keyword(s):  
Tension Test ◽  
Test Results ◽  
Cfrp Laminates

scholarly journals Research on the optical grinding and polishing technology of spherical mirror based on alloy steel materials

2021 ◽  
Vol 63 (3) ◽  
pp. 50-54
Author(s):  
Hong Tuan Pham ◽  
◽  
Xuan Thanh Nguyen ◽  
Thanh Hop Nguyen ◽  
◽  
...  
Keyword(s):  
Alloy Steel ◽  
Spherical Mirror ◽  
Test Results ◽  
Machining Processes ◽  
Grinding Method ◽  
Steel Material ◽  
Spherical Surfaces ◽  
Design And Manufacture ◽  
Glass Lenses ◽  
Grinding And Polishing

In Vietnam, the technology of fabricating spherical surfaces of glass lenses by the loose abrasive grinding method has been researched and widely applied. However, this technology does not really match the needs of grinding and polishing optically the sphere on the basis of alloy steel. This paper introduces some initial results in researching the technology of optical mirror polishing of alloy steel materials. The issues studied include the selection of processing methods and equipment, design and manufacture of auxiliary tools and machining tools, testing and setting up machining processes, and the methodology for characterisation product quality. A spherical mirror of 50 mm in diameter, 70 mm in spherical radius, based on alloy steel material has been optically polished. Test results show that the sample meets the requirements for optical products (N=1; ΔN=1, surface roughness Rz=0.05 μm).

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