ASTM D D determines the tensile testing of aramid yarns, cords twisted from such yarns, and fabrics woven from such cords. The yarn or cord may be wound on cones, tubes, bobbins, spools, or beams; may be woven into fabric; or may be in some other form. The methods include testing procedure only and include no specifications or tolerances. By means of our tensile testing expertise and modular product design, we will help find the solution that is right for you. Give our test engineers a call today for help configuring the best test machine and accessories according to ASTM D Forces up to 10 kN 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.
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Aramid material was originally developed by Stephanie Kwolek at Dupont. There are several types of forms that these fibers can come in including individual fibers, wound yarns, cordage, and fabrics. Each type of sample requires a different type of grip. The geometry of aramid or kevlar material can vary based on which stage in the manufacturing process it is in. Small, individual fibers can be tested as well as full woven fabrics.
Several types of grip solutions can be used to test under this specification. In the video, wedge grips are used to test a thin strip of aramid material that will be used inside a racing tire. If a longer piece of fabric is to be tested, the wrap grip is a much better solution. Individual fibers can be tested using our Wind Fixtures for small cordage, yarns and fibers. Several other types of specification tabulations can be analyzed.
They are laid out in the official ASTM publication. Similar Specifications:. ASTM D Geometry: The geometry of aramid or kevlar material can vary based on which stage in the manufacturing process it is in. Solution: Several types of grip solutions can be used to test under this specification. Pricing and Availability.
ASTM D7269 Tensile Testing of Aramid Yarns
The yarn or cord may be wound on cones, tubes, bobbins, spools, or beams; may be woven into fabric; or may be in some other form. The methods include testing procedure only and include no specifications or tolerances. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Multi-user access to over 3, medical device standards, regulations, expert commentaries and other documents. Worldwide Standards We can source any standard from anywhere in the world.
ASTM D7269 TESTING FIXTURE
Historical Version s - view previous versions of standard. Work Item s - proposed revisions of this standard. More D Among these conditions are rate of stretching, type of clamps, gauge length of specimen, temperature and humidity of the atmosphere, rate of airflow across the specimen, and temperature and moisture content of the specimen. Testing conditions accordingly are specified precisely to obtain reproducible test results on a specific sample. When needed to compare intrinsic strength characteristics of yarns or cords of different sizes or different types of fiber, breaking tenacity is very useful because, for a given type of fiber, breaking force is approximately proportional to linear density.
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