Tear test of Fabric by trapezoid method to ASTM D ASTM D covers the measurement of the tearing strength of textile fabrics by the trapezoid tear test using a constant-rate-of-extension-type (CRE) tensile. ASTM D Tearing Strength of Fabric by. Trapezoid Procedure. • Scope – this test method describes the determination of the tearing strength of fabrics by the.
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For this test, it is important to have an increased test data rate to ensure the capture a high number of data points. Satm 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.
Sampling and Test Specimens 7. The values stated in inch-pound units may be approximate.
ASTM D – 05 Standard Test Method for Tearing Strength of Fabrics by Trapezoid Procedure
As a minimum, the two parties should take a group of test specimens that are as homogeneous as possible and that are from a lot of material of the type in question. The nonparallel sides of the marked trapezoid are clamped in parallel jaws of a tensile testing machine.
Randomly assign the samples in equal numbers to each laboratory. Signicance and Use 5. Users of previous versions of software such as Bluehill 2 and Bluehill 3 can easily upgrade to the newest version of Bluehill. Larger differences are likely to occur under all other circumstances. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. D — 96 Standard Test Method for Tearing Strength of Fabrics by Trapezoid Procedure1 This standard is issued under the xed designation D ; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision.
If you have tried all of these steps and yarn distortion still occurs, this must be included in the report. The American Society for Testing and Materials takes no position respecting the validity of any d55887 rights asserted in connection with any item mentioned in this standard.
Tear Strength of Fabrics – Trapezoid Procedure
Consequently, these test instruments may be used when agreed upon between the purchaser and the supplier. Link to Active This link will always route to the current Active version of the standard. Before a meaningful statement asmt be made about two specic laboratories, the amount of statistical bias, if any, between them must be established with each comparison being based on recent data obtained on specimens taken from a lot of fabric to the type being evaluated, so as to be as nearly homogeneous as possible, and then randomly assigned in equal numbers to each of the laboratories.
G Hydraulic Vice Action Grip. Link to Active This link will always route to the current Active version of the standard.
Pneumatic side action grips with rubber coated jaw faces are well suited for clamping of the astk specimens. This test method allows the use of the CRT-type tensile machine when agreed upon between the purchaser and the supplier. It is recognized that some constant-rate-of-traversetype CRT tensile testing machines continue to be used.
It is recognized that some constant-rate-of-traverse-type CRT tensile testing machines continue to be used. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.
ASTM D5587 Tearing Strength of Fabrics by Trapezoid Procedure
If more than 2 min elapse between taking the wet specimen from the water bath and starting the tension testing machine, discard the specimen and take another. In the absence of such an agreement, take the number of fabric rolls specied in Table 1. Some modification of clamping techniques may be necessary asstm a given fabric, depending upon its structure.
While manual action grips will work, many prefer pneumatic side action grips for ease of use, productivity, and better repeatability. There may be no overall correlation, however, between the results obtained with the CRT-type machine and the CRE-type machine. A superscript epsilon e indicates an editorial change since the last revision or reapproval. Stop c5587 crosshead motion after a total tear of approximately 75 mm 3 in.
The separation of the jaws is increased continuously to apply a force to propagate the tear across the specimen. Wherever possible, this shall be prevented. A rectangular specimen is marked and prepared so that it can be loaded in the grip faces at an angle, allowing a tear to propagate across the specimen.
The force to continue the tear is calculated from autographic chart recorders or microprocessor data collection systems. For fabrics not readily wet out with water, such as those treated with waterrepellent or water-resistant materials, add a 0. It is useful for estimating the relative tear resistance of different fabrics or different directions in the same fabric. When specimens are to be tested wet, take the specimens from areas adjacent to the dry test specimens. Subscribe to Our Newsletters.
Manual clamping is permitted providing no slippage of the specimen is observed. Analysis of the data was conducted using Practices D and Das well as the adjunct Tex-Pac. The values stated in inch-pound units may be approximate. The fabrics may be untreated, heavily sized, coated, resin-treated, or otherwise treated.