The Ways of Reaching the Specified Mode of Testing Samples for Torsion with Variable Strain Rate

2020 ◽  
Vol 989 ◽  
pp. 671-677
Author(s):  
Mikhail V. Erpalov ◽  
Dmitry A. Pavlov
Keyword(s):  
Angular Velocity ◽  
Smooth Transition ◽  
Practical Implementation ◽  
Test Results ◽  
Torsion Testing ◽  
Test Setup ◽  
Testing Method ◽  
Properties Of Materials ◽  
Testing Mode ◽  
Cylindrical Samples

The paper is devoted to the practical implementation of the new torsion testing method for studying rheological properties of materials in a hot state. This method involves the testing of cylindrical samples in the grips of a test setup, the angular velocity of which changes exponentially. The testing mode allows you to restore the hardening curves of a material according to the test results. This article aims to formulate the requirements for possible ways to implement the proposed testing method, and presents two different ways to obtain the specified exponential testing mode. The experience of their use on the test setup in the Ural Federal University indicates the feasibility of the new testing method, as well as the possibility of a smooth transition to the specified testing mode.

Analisa Pengujian Repeatability Timbangan Elektronik dengan Metode Syarat Teknis Timbangan Non Otomatis dan Metode NMI Australia

2019 ◽  
Vol 4 (2) ◽  
pp. 176-183
Author(s):  
Ponco Wali
Keyword(s):  
Research Method ◽  
Test Methods ◽  
Test Results ◽  
Repeat Testing ◽  
Testing Method ◽  
Technical Requirements

Testing repeat electronic scales with non-automatic scales technical requirements so far is fairly long if not using a calculator or computer. The aim of this research is to compare the repeatability testing method of electronic scales using methods according to the technical requirements of non-automatic scales and the Australian NMI method, both of which refer to OIML R76 in determining the validity or cancellation of electronic scales repeatability testing. This research method is done through repeat testing on 3 samples of electronic scales, then on each electronic scale 2 test methods are performed. The conclusion is that the electronic scales repeatability testing uses the non-automatic scales technical requirements method and the Australian NMI method has some differences although both refer to OIML R76. These differences include several points, namely the charge used, the method of adding additions, the formula for determining electronic scales, and different test results. The Australian NMI method is deemed to make it easier and more time efficient compared to the non-automatic weighing technical requirements method.

Optimizing the Shape and Size of Cruciform Specimens Used for Biaxial Tensile Test

2014 ◽  
Vol 658 ◽  
pp. 167-172 ◽  
Author(s):  
Liviu Andrusca ◽  
Viorel Goanta ◽  
Paul Doru Barsanescu
Keyword(s):  
Mechanical Properties ◽  
Tensile Test ◽  
Continuous Monitoring ◽  
Biaxial Tension ◽  
Cruciform Specimen ◽  
Testing Method ◽  
Biaxial Tests ◽  
Properties Of Materials ◽  
Failure Theories ◽  
Shape And Size

Testing cruciform specimens subjected to biaxial tension is one of the most widely used experimental techniques and more accurate at this time to determine the mechanical properties of materials and to verify the failure theories. This type of experiment allows the continuous monitoring of behavior of materials from the beginning of deformation until fracture under different ratios of forces and directions of the deformation, which transforms it into a very versatile testing method. We have varied the number of parameters and their values in order to achieve a uniform distribution of biaxial state of stresses and strains in the area tested. In theory, any material can be tested by stretching a biaxial cruciform specimen, but must be investigated in what way the shape of the specimen influence the data obtained. In this paper are presented the requirements that must be fulfilled by the samples used for tensile / compression biaxial tests and the design of cruciform specimens through FEA that meet these demands.

Component Based Method for Usability Testing of a Website

2013 ◽  
Vol 765-767 ◽  
pp. 1507-1511
Author(s):  
Saeeda Sharmeen Rahman ◽  
Jing Nong Weng
Keyword(s):  
Software Engineering ◽  
Modular Forms ◽  
Web Site ◽  
Usability Testing ◽  
Test Results ◽  
Testing Method ◽  
Component Based Software Engineering ◽  
User Friendly ◽  
University Web Site ◽  
The Web

This paper presents the Component-Based Software Engineering (CBSE) approach for usability testing of a web-site based on ISO 9241-11 usability guidance to achieve specified goals with effectiveness, efficiency and satisfaction. Usability testing is a technique used to evaluate a product by testing it on users. A particular type of website i.e. university web site was chosen and segmented in different components in modular forms according to the purpose of that component. Then component wise tasks as per ISO 9241-11 usability guidance were prepared to carry out the usability testing for evaluating the test web-site. After analyzing the results of component based usability testing, a proto-type version of the test web-site was designed in a limited form including all the feedback of test results. Finally, the proto-type web-site was re-evaluated for establishing the effectiveness of component based web usability method with the same tasks. The proposed component based usability testing method is expected to improve the design/content issues of web-site resulting the web-site much more user friendly, effective and less time and cost consuming.

scholarly journals Study on Suitability and Behaviour of Ferrocement in Folded Plates

2021 ◽  
Vol 9 (VI) ◽  
pp. 3540-3546
Author(s):  
Mr. V. Karthick
Keyword(s):  
Stainless Steel ◽  
Compressive Strength ◽  
Cross Section ◽  
Test Results ◽  
Logical Investigation ◽  
Second Stage ◽  
Concrete Application ◽  
Extended Range ◽  
Properties Of Materials ◽  
Low Consumption

Ferro concrete is one of the developments arising material an alternative for the traditional RCC in numerous viewpoints. Ferro concrete is the fate of the minimal expense houses and precast houses. Folded plates are answer for the more extended range rooftops in prudent and aesthetical manner. This project consolidates the upsides of both Ferro concrete and collapsed plate. The box type Ferro concrete collapsed plates of size 0.6 m x 1.80 m x 0.15 m are casted by thinking about various diaries and RCC collapsed plates in thought while fixing dimensions. In first period of trial various properties of materials utilized for projecting are tried and compressive strength of the mortar utilized is tried, the test is done at 1:2 of concrete: sand proportion and 0.35 water concrete ratio. In second stage the example is casted with Stainless Steel cross section of 2 mm opening is utilized and 2 layers on front and posteriors of 6mm width 150m divided skeleton steel is laid. The projected examples is tried for 28 days strength in stacking outline and the outcomes are contrasted and logical investigation Using ANSYS for load versus redirection and reasonableness of Ferro concrete application in collapsed plates are studies. The test results are shown acceptable outcomes, at last with low consumption and low self-weight Ferro concrete constructions are acceptable substitute for RCC.

A New Method to Measure Prandtl Number and Thermal Conductivity of Fluids

1957 ◽  
Vol 24 (1) ◽  
pp. 25-28
Author(s):  
E. R. G. Eckert ◽  
T. F. Irvine
Keyword(s):  
Thermal Conductivity ◽  
Boundary Layer ◽  
Prandtl Number ◽  
High Velocity ◽  
Atmospheric Pressure ◽  
New Method ◽  
Test Results ◽  
Test Setup ◽  
Velocity Boundary Layer ◽  
Layer Flow

Abstract A new method is described by which the Prandtl number and indirectly the thermal conductivity of fluids can be measured. The method is based on the fact that a well-established, unique relation exists between the Prandtl number and the recovery factor for laminar high-velocity boundary-layer flow. The test setup is described which has been devised for such measurements, and test results are presented for air at atmospheric pressure and temperatures between 60 and 350 F.

In-flight reconfiguration of lithium-ion cells aimed at extending flight times and range of electrically powered UAVs

2019 ◽  
Vol 7 (3) ◽  
pp. 98-111 ◽  
Author(s):  
Svetoslav Zabunov ◽  
Garo Mardirossian
Keyword(s):  
Design Methodology ◽  
Lithium Ion ◽  
Test Results ◽  
Content Type ◽  
Test Setup ◽  
Lithium Ion Cells ◽  
Battery Design ◽  
Novel Design ◽  
Battery Module

Purpose The purpose of this paper is to disclose a novel reconfiguration battery design suitable for electrically powered UAVs. Design/methodology/approach A design of a reconfigurable battery module is presented. Test setup with prototype battery module is developed and described. Test results of measurements are shown and discussed. Findings The results ascertain the benefits of implementing a reconfigurable battery in small electrically powered UAVs and specifically prove the efficiency of the proposed design. Originality/value The proposed novel design is compared to previous work while advances from the latter and the gained advantages were established.

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