ASTM D 3479/D 3479M Standard Test Method for Tension-Tension Fatigue of Polymer Matrix Composite Materials
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ASTM D 3479/D 3479M Document Information:
Title
Standard Test Method for Tension-Tension Fatigue of Polymer Matrix Composite Materials
ASTM International
Publication Date:
Jul 10, 1996
Scope:
This test method determines the fatigue behavior of polymer
matrix composite materials subjected to tensile cyclic loading. The
composite material forms are limited to continuous-fiber or
discontinuous-fiber reinforced composites for which the elastic
properties are specially orthotropic with respect to the test
direction. This test method is limited to unnotched test specimens
subjected to constant amplitude uniaxial in-plane loading where the
loading is defined in terms of a test control parameter.
This test method presents two procedures where each defines a
different test control parameter.
Procedure A—A system in which the test control
parameter is the load (stress) and the machine is controlled so
that the test specimen is subjected to repetitive constant
amplitude load cycles. In this procedure, the test control
parameter may be described using either engineering stress or
applied load as a constant amplitude fatigue variable.
Procedure B—A system in which the test control
parameter is the strain in the loading direction and the machine is
controlled so that the test specimen is subjected to repetitive
constant amplitude strain cycles. In this procedure, the test
control parameter may be described using engineering strain in the
loading direction as a constant amplitude fatigue variable.
The values stated in either SI units or inch-pound units are to
be regarded separately as standard. Within the text the inch-pound
units are shown in brackets. The values stated in each system are
not exact equivalents; therefore, each system must be used
independently of the other. Combining values from the two systems
may result in non-conformance with this standard.
This standard does not purport to address all of the safety
concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and
health practices and determine the applicability of regulatory
limitations prior to use.
Keywords:
- composite materials
- fatigue
- polymer matrix composites
- properties
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