||New ASTM Compression Test Method Is Reliable, Cost-Effective,
and Easy to Use
D 6641, Standard Test Method for Determining the Compressive Properties
of Polymer Matrix Composite Laminates Using a Combined Loading
Compression (CLC) Test Fixture, was hot off the press in May from
ASTM Committee D30 on Composites.
This new compression test method has the strong potential to
eventually replace all of the various other compression test methods
standardized by ASTM and other groups, said Donald F. Adams,
Ph.D., who spent 27 years at the University of Wyoming as professor
of Mechanical Engineering and director of the Composite Materials
Research Group. It is relatively easy to use, the fixture is
moderate in cost, and the test results obtained have proven very
This test method establishes a procedure for determining the
compressive strength and stiffness properties of polymer matrix
composite materials using a combined loading compression test
fixture. This test method is applicable to general flat laminates
that are balanced and symmetric.
Anyone wanting to determine the compressive properties of composite
materials will be potential users, said Adams, who drafted the
standard. This includes all industry sectors, as well as government
agencies and universities.
D 6641 was developed under ASTM Subcommittee D30.04 on Lamina
and Laminate Test Methods with input from many test engineers
throughout industry, government agencies, and universities, said
Adams, now president of Wyoming Test Fixtures, Inc., Laramie,
Wyo., after retiring from the university in 1999.
Much of the basic initial work on the test method was reported
to and critiqued by the many members of the committee developing
MIL-HDBK-17, Polymer Matrix Composites, which is being continually
updated and published by the U.S. Army Research Laboratory, Materials
Directorate, he concluded.
Standard D 6641 was approved by ASTM on March 10 and published
For further technical information, contact Donald F. Adams, Ph.D., Wyoming Test Fixtures, Inc., Laramie, Wyo. (phone: 307/742-8641).
Committee D30 meets in Santa Barbara, Calif., Oct. 16-18 in conjunction
with MIL Handbook 17, and March 11-14 in Pittsburgh, Pa. For membership
or meeting details, contact James P. Olshefsky, manager, ASTM Technical Committee Operations (phone: 610/832-9714).
Copyright 2001, ASTM