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In-Plane Compression Testing of Fiber-Reinforced Plastic Composites (ISO 14126)

ISO 14126 describes the methodology for determining the in-plane compressive properties of fiber-reinforced plastic composites. The standard describes two different methods for evaluating the properties:

 - Method 1: provides for shear loading of the specimen
 - Method 2: provides for end loading or mixed loading of the specimen
 
Ultimately, these two methods require two different test fixtures. The more common method of the two is Method 1, which uses a Celanese-type fixture (shown at right).  Also, in both methods, the specimen gauge length is completely unsupported. 

For the Method 1 test, the specimen is supported in the fixture and compressed, using hardened-steel compression anvils, along its major axis at constant rate of displacement until the specimen fractures.  Because of the typically high forces that are recorded during this test, we usually recommend a dual-column electromechanical testing system
 
Finally, accurate strain measurement is required for making measurements such as compressive modulus or compressive failure strain. Therefore, either a suitable extensometer or bonded resistance strain gauges are required for measuring axial strain throughout the test.

About This Solution

Related Standards: ISO 14126
Specimen Type: Rectangular
Materials: Plastics | Composites
Type of Test: Compression (What is a Compression Test?)
Business Sector: Aerospace and Suppliers | Automotive/Truck/Rail/Shipbuilding
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