Category: Textile

ASTM D6797

Standard Test Method for Bursting Strength of Fabrics Constant Rate of Extension (CRE) Ball Burst Test

ASTM D5034

ASTM D5034: Standard Test Method for Tensile Properties of Textile Materials, Grab Test. (Elevated, and sub-ambient temperatures)

Scope:
This test is designed for testing textile fabrics.  It is used to measure the force required to break the material, and the extent to which it elongates to the breaking point.   A stress-strain diagram is produced from the extracted data, and is used to determine the modulus, yield, and fracture point.  The material can be conditioned to be tested at varying temperatures and environmental conditions according to the client’s specifications.

Procedure:
The specimen is prepared by cutting a size specified in the ASTM 5034 standard and then conditioned according to the client’s specifications. Prior to beginning the test, the machine is set to the starting gauge length, as per the standard, then inserted in the appropriate gripping fixture. The testing engineer then inputs relevant dimensional and material criteria into the software.  The specimen is finally pulled at a constant rate of extension, or load, and the software produces a stress-strain diagram.  Multiple specimens are usually tested to show material property consistency.

Data:
Tensile strength, modulus of elasticity, tensile strain, transition strain, .

Equipment:
Test frame, elevated temperature cabinet, test method software

Test Setup

ASTM D2256

ASTM D2256: Standard Test Method for Tensile Properties of Yarns by the Single-Strand Method

Scope:
This method covers the testing of tensile properties of monofilament, multifilament, and spun yarns.

Procedure:
After proper conditioning, the technician sets the machine to the appropriate starting gauge length as per the ASTM standard.   The specimen is fitted onto the grips, the fiber tex and/or diameter are entered and the testing begins.  The technician will remove the broken pieces, attach them to each other, and clearly indicate which end is the fractured end.  Multiple tests will be performed to determine variability.

Data:
Breaking force, breaking tenacity, elongation, initial modulus, chord modulus, breaking toughness

Equipment used:
Test frame, pneumatic cord and yarn grips, pneumatic foot switch, test method software

ASTM D6797

Standard Test Method for Bursting Strength of Fabrics Constant Rate of Extension (CRE) Ball Burst Test