ASTM D – Tensile Properties of Yarns by the Single Strand Method. Scope: This test is used to determine the Breaking Force and Elongation of yarns. This standard is issued under the fixed designation D ; the number 1 This test method is under the jurisdiction of ASTM Committee D13 on Textiles. ASTM D is by far the most common specification that is followed for determining the breaking strength, elongation, and energy of single strand textiles.
|Published (Last):||11 July 2016|
|PDF File Size:||9.71 Mb|
|ePub File Size:||4.59 Mb|
|Price:||Free* [*Free Regsitration Required]|
ASTM D – 02 Standard Test Method for Tensile Properties of Yarns by the Single-Strand Method
When tensile tests are performed at a fixed time-to-break, then reasonable agreement in breaking force has generally been found to exist between CRT and CRE tension testing machines.
Contact Us View Accessories Catalog. Description Literature Contact Us This standard specifies the method for determining the tensile properties of yarns using the single-strand method, and helps determine the quality of the raw material while aiding in quality control of the finished product.
Most yarns can be tested by this test method some modification of clamping techniques may be necessary for a given yarn depending upon its structure and composition. Subscribe to Our Newsletters. A specially designed horn with a smooth finish and a contoured surface with a graduated cam allows for easy loading and a stress reduced clamping area on the specimen.
Test Methods Dand Specification D Discover simpler and smarter testing with features such as pre-loaded test methods, QuickTest in seconds, enhanced data exporting: Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. The clamping mechanism can be d226 either automatically or through a foot switch. Have a question about conducting the test for this standard?
The chord modulus is used to estimate the resistance to imposed strain.
Users of previous versions of software such as Bluehill 2 and Bluehill 3 can easily upgrade atm the newest version of Bluehill. Reporting calculations in compliance with the standard Specimen gripping Instron’s Solution: The aastm of testing to this standard are: Historical Version s – view previous versions of standard.
Concrete, Asphalt and Rock. Typically used for these tests are single column or dual column tabletop universal testing machines that are configured with capstan or pneumatic cord and yarn gripswhich are highly effective at reducing clamping stress applied to the specimen and providing essential specimen alignment.
This standard specifies the method for determining the tensile properties of d2256 using the single-strand method, and helps determine the quality of the raw material while aiding in quality control of the finished product. This allows hands-free grip operation enabling the specimen to be held with both hands, for easy loading.
Adtm offer machines, apparatus, testers, tensile grips, test fixtures, clamps, holders, jigs, faces, jaws, extensometers, environmental and humidity chambers, furnaces, dd2256 and custom solutions for unique applications.
Force-elongation curves can be converted to stress-strain curves if the force is converted to unit stress, such as to centinewtons per tex, or pounds per square inch, or pascals, or grams-force per tex, or grams-force per denier, and the elongation is based on change per unit length.
The agreement is not necessarily good, however, between CRE or CRT tension testing machines on the one hand and CRL tension testing machines on the other even when they are all operated at the same time-to-break. WaveMatrix 2 for Dynamic Testing. Forces up to 10 kN 2, lbf Low force tabletop systems Modular series of five frame options with adjustable test space R2256 testing option for tension, compression, bend, peel and much more. Force range of 5 kN to kN 1, lbf tolbf Adjustable test space The most popular choice for static tension d256 compression tests These dual column testers are available in both tabletop and floor standing models.
To prevent slippage in the clamps or damage as a result of being gripped in the clamps, special clamping adaptations may be necessary with high modulus yarns made from fibers such as glass or extended chain polyolefin. Pneumatic cord and yarn grips provide selectable clamping force to accommodate different materials and excellent follow-up action which compensates for decay of the holding force due to specimen creep.
Subscribe to Instron News!
ASTM D2256 Tensile Properties of Yarns
The CRE-type tester is the preferred tension testing machine. Bluehill Universal Brochure Bluehill Universal Software is built from the ground-up for touch interaction and an intuitive user experience. The breaking toughness is a measure of the work necessary to break the yarn.
The test results from the laboratories involved should be compared using a statistical test for unpaired data, a probability level chosen prior to the testing series. Bluehill Universal Software is built from the ground-up for touch interaction and an intuitive user experience. For directions covering the determination of breaking force of yarn by the skein method refer to Test Method D Load ratings from 1 kN to 20 kN lbf to 4, lbf Great option for strapping, fabric strips, or similar specimens Designed to resist specimen rupture at grip interface Accomodates various specimen thicknesses and widths.
However, this statement is not applicable to knot and loop breaking force tests, tests on wet specimens, tests on oven-dried specimens, or tests on specimens exposed to low or high temperatures and should be used with caution for acceptance testing because factual information on between-laboratory precision and bias is not available. If a bias is found, either its cause must be found and corrected, or future test results for that material must be adjusted in consideration of the known bias.
F2256 values from the two systems may result in non-conformance with the standard. Software for Series Systems. As a minimum, use the samples for such a comparative tests that are as homogeneous as possible, v2256 from the same lot of material as the samples that resulted in disparate results during initial testing and randomly assigned in equal numbers to each laboratory. Bluehill LE for Basic Testing. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other.
They are designed with standard and optional features that increase testing efficiency and improve the testing experience for the operator. Next Checking to see if you are a returning visitor…. Email addresses can only contain letters, numbers and the following special characters: We are confident that we have what you are looking for. Some modification of clamping techniques may be necessary for a given yarn depending upon its structure d2526 composition.
The skein-breaking force is always lower than the sum of the breaking forces d22556 the same number of ends broken individually. Special methods for testing yarns made from specific fibers; namely, glass, flax, hemp, ramie, and kraft paper and wstm specific products; namely, tire cords and rope, have been published: To determine tensile strength and elongation at break, specimens are clamped in the appropriate grips and pulled at a constant rate until failure occurs.
It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.