ASTM D6484 Open Hole Compressive Strength of Polymer Matrix Composite Laminates
Standard At A Glance
- ASTM D6484
ASTM D6484 is a testing standard that measures the open-hole compressive strength of multidirectional polymer matrix composite laminates. Because mechanical fasteners such as rivets, pins, and bolts are commonly used to connect composite laminates, open-hole compressive testing is required in order to determine the ultimate compressive strength of the laminate, the ratio of the specimen across the hole to the diameter of the hole, and the percent bending. ASTM D6484 is relevant to the aerospace industry for the purposes of material specifications, research and development, quality assurance, and structural design and analysis.
Materials Testing System
ASTM D6484 should be run on a well-aligned electromechanical test system such as Instron's 5980 Series with grips and fixtures appropriate to which test procedure is being used. Operators also have the option of using edge-mounted extensometers to measure the displacement.
|ASTM D6484 Test Setup|
|1)||5980 Series Universal Testing System
|2)||Bluehill Universal Software
|3)||2580 Series Load Cell
|4)||CP113779 Open-Hole Compression Test Fixture
|5)||2742-501 Advanced Hydraulic Wedge Grips
Grips and Fixtures
There are two different procedures for testing to ASTM D6484. In procedure A, the laminate face is supported in a bolted test fixture. The ends of the fixture are clamped in hydraulic wedge grips, transmitting the force in shear. In Procedure B, compression platens are required to compress the specimen within the test fixture in end loading.
Testing Tips and Tricks
- During panel fabrication it is critical to have good fiber alignment, since a misalignment could significantly reduce the compressive strength of the laminate.
- When calculating the ultimate compressive strength of the laminate specimen, use the cross-sectional area of the test coupon without taking the hole into account.
- To read the full test procedures for this standard, purchase ASTM D6484.
Bluehill Universal Software is built from the ground-up for touch interaction and an intuitive user experience. Discover simpler and smarter testing with features such as pre-loaded test methods, QuickTest in seconds, enhanced data exporting: and Instron Connect – a new feature that provides a direct communication link to Service. Users of previous versions of software such as Bluehill 2 and Bluehill 3 can easily upgrade to the newest version of Bluehill.
The ASTM D6484 / D6484M fixture is used to perform open-hole compressive tests on multi-directional polymer matrix composite laminates reinforced with high modulus fibers.
Instron's 100 kN hydraulic wedge grips provide an innovative solution for high-capacity testing and delivery enhanced gripping performance, usability, and operator safety.
5980 floor models are robust, heavy-duty frames commonly used for testing high-strength metals and alloys, advanced composites, aerospace and automotive structures, bolts, fasteners, and plate steels.