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):||19 June 2012|
|PDF File Size:||19.29 Mb|
|ePub File Size:||20.96 Mb|
|Price:||Free* [*Free Regsitration Required]|
Wet tests are made on flax yarns to detect adulteration by failure to show a gain in breaking force. ASTM D D determines the tensile properties of monofilament, multifilament, and spun yarns, either single, plied, or cabled with the exception of yarns that stretch more than 5.
Elongation in knot or loop tests is not known to have any significance and is not usually reported. The clamping mechanism can be activated either automatically or through a foot switch. Instron, a leading provider of testing equipment designed to evaluate the mechanical properties of materials and components, offers an easy solution designed specifically to overcome the problem of premature failure for industrial textile fibers — including Aramid and UHMwPE.
Pneumatic cord and yarn grips provide a convenient method for clamping fiber, cord, yarns and fine wires to reduce the problem associated with testing these materials.
Software for Series Systems. Load ratings d22256 N to 5 kN 45 lbf to 1, lbf Designed for testing cord, yarn, fine winer, and similar specimens Rounded specimen mount resists specimen failure at the grip itself Pneumatic actuation for fast and easy specimen atm.
These alternative rates may xstm used only by agreement between the parties concerned or when required in an applicable material specification. A specially designed horn with a c2256 finish and a contoured surface with a graduated cam allows for easy loading and a stress reduced clamping area on the specimen. 2d256 that results obtained when testing oven-dried specimens at standard temperature will not necessarily agree with the results x2256 when testing oven-dried yarns at high temperatures.
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. 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. This allows hands-free grip operation enabling the specimen to be held with both hands, for easy loading.
Special methods for testing yarns made from specific fibers; namely, glass, flax, hemp, ramie, and kraft paper and for specific products; namely, tire cords and rope, have been published: 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.
In any event, the procedure described in this test method for obtaining tensile properties must be maintained. To prevent slippage in the clamps or damage as a result of xstm gripped in the clamps, special clamping adaptations may be necessary with high modulus yarns made from fibers such as glass or extended chain polyolefin.
ASTM D2256 Tensile Yarns Testing Equipment
Test Methods Astkand Specification D 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 d22556 bias is not available. Check this box to receive pertinent commercial email from Instron focusing on products, upcoming events, and more!
Bluehill Universal Brochure Bluehill Universal Software is built from the ground-up for touch interaction and an intuitive user experience. Onsite Training At Your Facility. Reporting calculations in compliance with the astn Specimen gripping Instron’s Solution: These are designed to permit predetermination of specimen length, and allow quick, convenient loading.
The test results can be used to determine the tenacitymodulusand strength of the material. Email addresses must contain the symbol.
Users of previous versions of software such as Bluehill 2 and Bluehill 3 can easily upgrade to the newest version of Bluehill. Give our test engineers a call today for help configuring the best test machine and accessories according to your standard. A straight, B knotted, and C looped form. Low-temperature tests are made on coated yarns used in the manufacture of materials used in outdoor applications, such as screening fabrics.
Most yarns can be tested by this d256 method asttm modification of clamping techniques may be necessary for a given yarn depending upon its structure and composition. Link to Active This link will always route to the current Active version of the standard. Please confirm that you agree with zstm privacy and cookies policy to submit this form. 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 f2256 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.
ASTM D – 02 Standard Test Method for Tensile Properties of Yarns by the Single-Strand Method
Have a question about conducting the test for this standard? The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other.
How can we help you? Bluehill Universal Software is built from the ground-up for touch interaction and an intuitive user experience. Force range of 5 kN to kN 1, lbf tolbf Adjustable test space The most popular choice for static tension and compression tests These dual column testers are available in both tabletop and floor standing models.
The skein-breaking force is always lower than the sum of the breaking forces of the same number of ends broken individually. 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.
We offer machines, apparatus, testers, tensile grips, test fixtures, clamps, holders, jigs, faces, jaws, extensometers, environmental and humidity chambers, furnaces, baths and custom solutions for unique applications. Subscribe to Our Newsletters.
Bluehill LE for Basic Testing. Next Checking to see if you are a returning visitor…. For directions covering the determination of breaking force of yarn by the skein method refer to Test Method D Pneumatic cord and d2256 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.
They are designed with standard and optional features that increase testing efficiency and improve the testing experience for the operator. 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. The test dat can be used to calculate breaking tenacity, initial modulus, chord modulus, and breaking toughness.
The challenges of testing to this standard are: The CRE-type tester is the preferred tension testing machine. Email addresses can only contain letters, numbers and the following special characters: To determine tensile strength and elongation at break, specimens are clamped in the appropriate grips and pulled at a constant rate until failure occurs.
Qstm difference in breaking force between tests at 17 and 23 s will usually not exceed 1. Forces up to 10 aatm 2, lbf Low force tabletop systems Modular series of five frame options with adjustable test space Affordable testing option for tension, compression, bend, peel and much more.