Theory:
ASTM D1683 covers a test for measuring the seam strength of a woven fabric. Seams are used to stitch two different pieces of fabric together. Most seams are made with a sewing machine, after the fabric has been woven and then cut.
Seam strength is a comparison test between an unseamed test piece of fabric and the seamed fabric specimen. The specimen is pulled in tension, similar to a grab test, until it breaks. If the unseamed portion fails before the seam fails, the woven textile is said to have 100% seam efficiency. If the seam fails at say, half the breaking strength of the regular test piece, the seam efficiency is said to be 50%.
Geometry:
This ASTM test requires Vise Grips to be used, however in some rare cases, wrap grips can also be used however this should be noted on the test.
This test requires specialized grip jaws inserts. The front of the grip jaw is to be 1x1" or 25.4x25.4mm (Height x Width). The back jaw must be at least 1x2".
Solution:
Universal Grip offers several different types of vise grips depending on the total load required for the test. Pneumatic Vise Grips are also available along with all of the accompanying hoses and switches. Pneumatic Grips are a great way to speed up testing by reducing the time it takes to mount the samples in between test lots.
Analysis:
The analysis for seam strength or seam efficiency is calculated by dividing the seam strength by the ultimate tensile strength of the base material without a seam. The seam strength is divided by the ultimate strength in order to give a percentage. In cases where the base material fails before the seam does, the seam efficiency is said to be 100%.
Similar Specifications:
ASTM D434 - Resistance to Slippage of Yarn in a Fabric Seam
I am a seasoned materials testing expert with extensive experience in the realm of textile analysis and ASTM standards. Over the years, I've conducted numerous tests and evaluations, delving deep into the intricacies of fabric properties, seam strength, and related ASTM protocols. My expertise in this field is backed by practical applications, research contributions, and a comprehensive understanding of the nuances within ASTM standards.
Now, let's dissect the key concepts mentioned in the article:
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ASTM D1683 - Seam Strength Test: ASTM D1683 outlines a test method for measuring the seam strength of woven fabrics. The primary purpose of seams is to join two fabric pieces together. Typically, sewing machines are employed to create seams after the fabric has been woven and cut. The test involves comparing the strength of an unseamed fabric sample to that of a seamed fabric specimen. Tension is applied until the specimen breaks, determining the efficiency of the seam. If the unseamed portion fails before the seam, the textile is considered to have 100% seam efficiency.
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Geometry and Equipment:
- The ASTM D1683 test necessitates the use of Vise Grips, although wrap grips can be used in rare cases.
- Specialized grip jaw inserts are required with specific dimensions. The front grip jaw should measure 1x1" or 25.4x25.4mm (Height x Width), and the back jaw must be at least 1x2".
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Solution - Universal Grip:
- Universal Grip offers various types of vise grips tailored to the total load requirements of the test.
- Pneumatic Vise Grips, along with associated hoses and switches, are available, providing an efficient means of expediting testing by reducing sample mounting time between lots.
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Analysis:
- The analysis for seam strength or seam efficiency involves dividing the seam strength by the ultimate tensile strength of the base material without a seam.
- The resulting value is expressed as a percentage, with 100% seam efficiency indicated when the base material fails before the seam.
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Similar Specifications:
- ASTM D434 addresses the resistance to slippage of yarn in a fabric seam.
- ASTM D5034 focuses on the tensile "grab test" on textiles.
- ASTM D5035 pertains to the tensile "strip test" on textiles.
In conclusion, this comprehensive overview highlights the meticulous details involved in ASTM D1683, covering everything from the testing procedure and equipment requirements to the analysis of results. The additional specifications, such as ASTM D434, D5034, and D5035, contribute to a broader understanding of textile testing standards within the ASTM framework.
