ASTM D3410 Test Fixture
Test apparatus for Standard Test Method for Compressive Properties of Polymer Matrix Composite Materials with Unsupported Gage Section by Shear Loading
This test method must be used to determine the in-plane compression properties of polymer matrix composite materials reinforced with high modulus fibers. The composite material forms are limited to continuous-fibre or discontinuous-fibre reinforced composites for which the elastic properties are especially orthotropic with respect to the test direction. This test procedure introduces the compressive force into the specimen through shear at wedge grip interfaces.
Up to 315 degrees Celsius, the IITRI test method appears to be a practical way to acquire data on the modulus and Poisson's ratio of composite materials (600F).
Additional procedures/test methods for determining the compressive properties of resin matrices and composites can be found in the following standards.
• ASTM D 695
• ASTM D5467/ D5467 M
• ASTM D 6641/ S 6641 M
Compressive Properties of Polymer Matrix Composite Materials by Shear Loading ASTM D3410 Test Scope:
By applying the compressive force into the specimen at wedge grip interfaces, this procedure establishes in-plane compressive characteristics. Although other materials may be tested, ASTM D3410 is best suited for composite materials reinforced by high modulus fibers like tape, wet-tow placement, textile (for example, fabric), short fibers, or similar product forms. The test fixture is designed to apply a compressive load to the specimen's unsupported centre that measures 12 to 25 mm (0.5 to 1 inch) in length of the sample.
Except for specially designed experiments and results, at least 5 samples should be tested to obtain valid results.
ASTM D3410 Specimen Dimensions According to Test Standard:
ASTM D3410 testing specimens must have a constant rectangular cross section that is between 140 and 155 millimetres (5.5 to 6 inches) long. It is advised to use a width of either 12 mm (0.5 in) or 25 mm (1 in). Different thicknesses can be supported. To guarantee failure in the unsupported gauge length, tabs could be glued to the ends of the thin specimens.
ASTM D3410 Material and Specimen Preparation
The most satisfactory test preparation procedure includes:
Breaking the cured unidirectional laminate near an edge parallel to the fiber direction to create the 0° orientation, or laying in small filament counts of contrast-colored fiber tows (aramid and aramid in carbon laminates or carbon in glass laminates) for prepreg production parallel to the 0° direction as part of or as part of panel fabrication.
Standard Conditioning Procedure for ASTM D3410 Testing
Conditioning procedure according to Procedure C of Test Method D 5229/D 5229M; Store in standard laboratory atmosphere (23 +- 3°C [73+-5°F] and 50 +- 10% RH) unless otherwise specified and testing is specified as part of the experiment.
ASTM D3410 Test Procedure:
1. Start by preparing rectangular cross sections with a maximum specimen thickness variation of 2% and a maximum specimen width variation of 1% as test specimens.
2. Center of the specimen in the fixture between the grip interfaces. Ensure that when the fixture is closed, the whole grip length contacts the grip faces.
3. Attach the strain gauges (or extensometer) to the specimen's mid-span and mid-width regions. Before beginning the test, confirm that the load reading is zero.
4. Until failure, apply the force at a uniform strain rate. The testing standard includes the recommended rates.
• Ultimate compressive strength,
• Ultimate compressive strain,
• Compressive chord modulus of elasticity,
• Compressive Poisson's ratio,
• Three-part failure identification codes are the compressive properties that can be calculated.
Noogta ASTM D3410 Test Apparatus Meets the Requirement for Following Industry Test Standards:
ASTM-D3410: Compressive Properties of Polymer Matrix Composite Materials with Unsupported Gage Section by Shear Loading
ISO 8515: Textile-glass-reinforced plastics - Determination of compressive properties in the direction parallel to the plane of lamination
DIN EN ISO 14126: Fibre-reinforced plastic composites - Determination of compressive properties in the in-plane direction
AITM1-0008: Fibre Reinforced Plastics – Determination of Plain, Open Hole and Filled Hole Compression Strength
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