ASTM D4032

Fabric Stiffness by Circular Bend Testing

Equipment for ASTM D4032 testing
Universal Testing Machine for ASTM D4032
Tensile Testing Machine for Fabric tests
Fabric Testing Machine and Fixture ASTM D4032
Circular Bend Fixture for Fabric Testing
Fabric Stiffness Test by Circular Bend Fixture
ASTM D4032 Background Image
ASTM D4032 Circular Bend Test Fixture
ASTM D4032 Fabric Stiffness Test
ASTM D4032 Universal Testing Machine
ASTM D4032 Stiffness Test Cloth
ASTM D4032 Circular Bending test fixture
Standard Test Method for Stiffness of Fabric by the Circular Bend Procedure
 
Theory:

ASTM 4032 covers a test for measuring the fabric stiffness of woven textiles. A circular plunger is pushed through a double ply square of fabric using a special puncture fixture. 

Geometry:

The orifice of the puncture fixture is 1.5 inches in diameter. The diameter of the plunger is 1 inch and is mounted concentrically with the lower puncture jig, leaving .25 in. of clearance on all sides. The sample is an 8x4 inch rectangular swatch which is folded in order to creat a two ply sample which is then a 4x4 inch square. 

Solution:

The ASTM D4032 puncture fixture can be used with a universal testing machine such as the Galdabini in order to test the fabric stiffness. The circular bend testing fixture have a standard female clevis coupling size of 5/8" and use a 5/16" locking pin. With simple adapters this fixture cancan attach onto any universal testing machine. 

Analysis:

The maximum or peak load measurement is taken during the test.  This is given as the fabric stiffness. This peak value is averaged over 5 different sample specimens for a specific sample lot. The Galdabini testing machine can organize samples into separate lots to create detailed reports for printing or analysis. 

 

Similar Specifications:

ASTM D732 - Shear Punch Tool Test for Plastics