A Comparison of Short Transverse Tension Test Methods

2009 ◽  
pp. 25-25-15 ◽  
Author(s):  
DN Reed ◽  
RP Smith ◽  
JK Strattan ◽  
RA Swift
Keyword(s):  
Test Methods ◽  
Tension Test ◽  
Short Transverse ◽  
Transverse Tension

scholarly journals An Innovative Test Method for Tensile Strength of Concrete by Applying the Strut-and-Tie Methodology

Materials ◽  
2020 ◽  
Vol 13 (12) ◽  
pp. 2776 ◽  
Author(s):  
Wen-Cheng Liao ◽  
Po-Shao Chen ◽  
Chung-Wen Hung ◽  
Suyash Kishor Wagh
Keyword(s):  
Tensile Strength ◽  
Test Methods ◽  
Standard Test ◽  
Strength Test ◽  
Tension Test ◽  
Test Method ◽  
Direct Tension ◽  
Direct Tension Test ◽  
Strut And Tie ◽  
Tensile Strength Test

Tensile strength is one of the important mechanical properties of concrete, but it is difficult to measure accurately due to the brittle nature of concrete in tension. The three widely used test methods for measuring the tensile strength of concrete each have their shortcomings: the direct tension test equipment is not easy to set up, particularly for alignment, and there are no standard test specifications; the tensile strengths obtained from the test method of splitting tensile strength (American Society for Testing and Materials, ASTM C496) and that of flexural strength of concrete (ASTM C78) are significantly different from the actual tensile strength owing to mechanisms of methodologies and test setup. The objective of this research is to develop a new concrete tensile strength test method that is easy to conduct and the result is close to the direct tension strength. By applying the strut-and-tie concept and modifying the experimental design of the ASTM C78, a new concrete tensile strength test method is proposed. The test results show that the concrete tensile strength obtained by this proposed method is close to the value obtained from the direct tension test for concrete with compressive strengths from 25 to 55 MPa. It shows that this innovative test method, which is precise and easy to conduct, can be an effective alternative for tensile strength of concrete.

Interpretation of Indirect Tension Test Based on Viscoelasticity

1997 ◽  
Vol 1590 (1) ◽  
pp. 45-52 ◽  
Author(s):  
A. Drescher ◽  
D. E. Newcomb ◽  
W. Zhang
Keyword(s):  
Asphalt Concrete ◽  
Complex Modulus ◽  
Resilient Modulus ◽  
Traditional Approach ◽  
Test Methods ◽  
Tension Test ◽  
Current Test ◽  
Indirect Tension ◽  
Materials Used ◽  
Indirect Tension Test

The diametral indirect tension test is a convenient configuration for determining the modulus of asphalt concrete samples. The resilient modulus test has been a traditional approach to characterizing the stiffness of asphalt concrete, but it leaves much to be desired when considering the viscous behavior this material exhibits, even at low temperatures. A method for determining the complex compliance, complex modulus, and phase angle of asphalt mixtures using the indirect tensile test and a haversine load history is presented here. This test may be performed over a range of frequencies and temperatures as demonstrated on materials used in the Minnesota Road Research Project. The use of the haversine loading simplifies the test when compared with the pulse loading and rest time used in the resilient modulus test, and it allows for the characterization of the elastic and viscous components of the material's overall behavior, which is very difficult, at best, with the current test methods.

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.

The Application of the Double Ligament Tensile Test in Deformation Processing

1976 ◽  
Vol 98 (4) ◽  
pp. 1237-1242 ◽  
Author(s):  
R. G. Kumble ◽  
J. T. Berry
Keyword(s):  
Tensile Test ◽  
Tensile Properties ◽  
Cross Sections ◽  
High Strength ◽  
Test Methods ◽  
Correction Factors ◽  
Low Carbon ◽  
Percent Elongation ◽  
Short Transverse ◽  
Wrought Aluminum

The foundation of the double ligament tensile test for determining mechanical properties of wrought as well as cast materials has been established. With the aid of the finite element stress analysis the design geometry of the double ligament specimen has been improved and correction factors for three design geometries have been calculated. Tensile properties of two low-carbon, very low-alloy steel plate materials and a high-strength wrought aluminum alloy have been determined by the double ligament tensile test. The corrected yield strength values and percent elongation data compare favorably with those obtained by conventional test methods where geometry considerations allow the sampling of full-size test bars. The test bar size is such that random sampling of multiple specimens (8) is quite permissible and desirable to determine representative tensile properties of a material. The test has been found to be particularly suitable in evaluating tensile properties in the short transverse direction of wrought plate and across cross sections of complex-shaped forgings or castings less than 1 in. (2.5 cm) in thickness.

scholarly journals Overview of the rubber belts tension test methods in the close transport conveyors

Mechanik ◽  
2019 ◽  
Vol 92 (3) ◽  
pp. 210-212
Author(s):  
Tomasz Ryba
Keyword(s):  
Real Time ◽  
Industry 4.0 ◽  
Test Methods ◽  
Tension Test ◽  
Test Equipment ◽  
Strain Gauges ◽  
Work Condition ◽  
The Real ◽  
Condition Diagnosis

The review of existing solution and the proposal of the test equipment for belts tension detection on the conveyor in the real time is presented. Application of strain gauges made it possible to obtain the data, which would enable to make proper work condition diagnosis and to adapt the process to requirements of the Industry 4.0.

A Review of Tension Test Methods for Thin Films

2007 ◽  
Vol 1052 ◽  
Author(s):  
William N. Sharpe
Keyword(s):  
Thin Films ◽  
Mechanical Property ◽  
Digital Imaging ◽  
Tensile Testing ◽  
Force Measurement ◽  
Test Methods ◽  
Tension Test ◽  
Test Method ◽  
Measurement Systems ◽  
Property Measurement

AbstractTest methods for mechanical property measurement of the thin films used in MEMS have been developed and refined over the last decade. This brief review considers only tensile testing since that is the preferred method for measuring Young's modulus, strength, etc. for macroscale structural materials. There are basically two kinds of tensile specimens – framed specimens whose support strips are cut after mounting and semidetached specimens fastened to the substrate at one end. The loading and force measurement systems are similar and use commercial transducers. Strain is measured either by overall grip displacement or by digital imaging in most cases. Initial works are described and followed by descriptions of some recent applications. The paper concludes with a suggested test method that could be amenable to standardization.

Laboratory proficiency in susceptibility testing of Helicobacter pylori using agar dilution and E test methods

2001 ◽  
Vol 120 (5) ◽  
pp. A586-A587
Author(s):  
L BEST ◽  
S JO ◽  
V VANZANTEN ◽  
D HALDANE ◽  
V LOO ◽  
...  
Keyword(s):  
Helicobacter Pylori ◽  
Susceptibility Testing ◽  
Test Methods ◽  
Agar Dilution

Intertester-Reliabilität des Upper Limb Neural Tension Tests (ULNT) 1

2019 ◽  
Vol 23 (02) ◽  
pp. 75-80
Author(s):  
Beate Schüßler ◽  
Andrea Pfingsten ◽  
Thomas Schöttker-Königer
Keyword(s):  
Upper Limb ◽  
Tension Test ◽  
Tension Tests

ZusammenfassungZur Überprüfung der Nervenleitfähigkeit werden Kraft, Reflexe und Sensibilität getestet. Bei der Untersuchung der Mechanosensitivität eines Nervs kommen neurodynamische Tests zum Einsatz. Der Upper Limb Neural Tension Test (ULNT) 1 bestimmt die Mechanosensitivität des N. medianus.Ziel der Studie war die Untersuchung der Intertester-Reliabilität des ULNT 1 von nicht spezialisierten Physiotherapeuten bei Probanden mit unilateralen Nacken- und/oder Armsymptomen.Die Therapeuten beurteilten binär und metrisch die Kriterien patientenspezifische Symptome, strukturelle Differenzierung und Bewegungsausmaß sowie das Gesamtergebnis bei 33 Patienten mit unilateralen Nacken- und/oder Armsymptomen. Bei den binären Daten bestimmte der Fleiss-Kappa und bei den metrischen Daten der Intraklassen-Korrelationskoeffizient die Reliabilität. Die zusätzlich erstellten Regressionsmodelle sollten den Einfluss der einzelnen Beurteilungskriterien auf die Gesamtentscheidung herausfiltern.Mit Ausnahme der Reproduzierbarkeit patientenspezifischer Symptome scheint die Beurteilung des ULNT 1 durch nicht spezialisierte Therapeuten nur schlecht vergleichbar zu sein. Da die metrische Bewertungsweise die individuellen Schwellenwerte besser darstellt, ist diese der binären vorzuziehen.

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