New Standard Guide for Testing Fabric-Reinforced Textile Composite Materials
Textile composites in aerospace and automotive structures get their name from the woven, braided or stitched fabric-reinforcements used in their construction.
ASTM D 6856, Standard Guide for Testing Fabric-Reinforced Textile Composite Materials, provides testing considerations for the unique characteristics of two- or three-dimensional fabrics in textile composites.
The microstructure (or fiber architecture) of a textile composite, which consists of interlacing yarns, can lead to increased inhomogeneity of the local displacement fields in the laminate, says Rajiv Naik, Ph.D., associate fellow, Pratt and Whitney, East Hartford, Conn. Depending upon the size of the yarns and the pattern of the weave or braid, the inhomogeneity within a textile composite can be large compared to traditional tape laminates.
D 6856 also describes the selection and use of existing ASTM test methods when measuring common material properties of textile composites.
ASTM Committee D30 on Composites approved the new guide this winter. Naik chaired its development with a task group of 13 engineers and materials scientists representing NASAs Jet Propulsion Laboratory, corporate aerospace manufacturers, independent testing laboratories, and the University of Dublin.
For further technical information, contact Naik (phone: 860/565-7477). Committee D30 meets March 22-25, 2004, in Salt Lake City, Utah. For membership or meeting details, contact Jim Olshefsky, director, Committee Services, ASTM International (phone: 610/832-9714). //
Copyright 2003, ASTM