EN2561:1995 Carbon Fiber Reinforced Plastics — Unidirectional Laminates — Tensile Test Parallel to the Fiber Direction
Standard At A Glance
- EN 2561
EN 2561 is a testing standard that determines the ultimate tensile strength, tensile modulus and, if required, the Poisson’s ratio and strain at failure in tension of carbon fiber reinforced plastics in the form of unidirectional laminates. This method is only applicable to specimens where the axis is parallel to the direction of the fibers; testing in the perpendicular is covered by the test methods in EN 2597. This standard is used by a range of manufacturers using carbon fiber laminates including those in the aerospace, automotive, wind energy, and construction industries. EN 2561 is typically used for materials development and qualification and quality control.
Materials Testing System
For testing high strength carbon fiber materials, Instron recommends a 5980 electromechanical floor model testing system. For lower strength materials such as glass fiber, a table model 6800 Series system may have sufficient capacity. Moving body grips meet the requirements of the standard and both manually and hydraulically operated types are available.
|EN 2561 Test Setup|
|1)||5900 Series Universal Testing System
|2)||Bluehill Universal Software
|3)||2580 Series Load Cell
|4)||2742 Series Hydraulic Wedge Grips
|5)||AVE2 Non-Contacting Extensometer
|EN 2561 Testing Accessories|
|2)||Biaxial Clip-On Extensometer
Strain measurement is a key part of testing to EN 2561. Strain measurement devices include simple strain gauges and a wide range of extensometers. Strain gauges can be connected to the testing machine via easy-to-use strain gauge adapters. A range of suitable contacting extensometers for axial and bi-axial strain measurements are also available. When strain at failure is required, a non-contacting strain measurement solution such as Instron's AVE2 is preferred. When tests need to be conducted at high or low temperatures a temperature chamber along with temperature-rated grips is required.
Testing Tips and Tricks
- Obtaining consistent results when testing composites requires accurate alignment of the test specimen. Instron testing frames and accessories provide excellent alignment.
- The composites module available in Bluehill Universal includes a pre-defined EN 2561 test method.
- To read the full standard, purchase EN 2561.
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.
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 second generation Advanced Video Extensometer (AVE 2) utilizes patented measurement technology in the fastest, most accurate non-contacting strain measurement device commercially available.
The 2630-100 series of extensometers offers speed of attachment and ease-of-use. The light-weight, rugged cross-brace design eliminates errors caused by physical distortion, while built-in protection ensures that damage is not caused by over-extension.