ISO 527-4 Tensile Properties of Isotropic and Orthotropic Fiber-Reinforced Plastic Composites
This part of ISO 527 specifies the test conditions for determining the tensile properties of isotropic and orthotropic fibre-reinforced plastic composites. Typical reinforcement materials include glass fibers, carbon fibers, aramid fibers and other similar fibers. The properties typically desired from these materials include ultimate strength, strain at failure, modulus, and in some cases, Poisson's Ratio.
A suitable system for testing these types of materials would be an electromechanical testing machine with mechanical wedge grips or pneumatic side-acting grips. The choice of jaw faces may vary depending on sample type, but typically serrated faces are used. An extensometer is also required to accurately measure strain. Non-contacting extensometers, such as the Advanced Video Extensometer 2 (AVE 2), have the resolution and accuracy to measure strain to failure for most composite materials. It is important to note, that because such little strain occurs within the initial linear elastic region of the stress-strain curve where modulus is measured, a clip-on extensometer is typically required in order to achieve the standard's extremely tight accuracy specification of approximately 1um.
If Poisson's Ratio is a desired property to be calculated, both an axial and a transverse extensometer are required. We find that our customers typically use a biaxial extensometer for this type of application.
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- 2.3 MB
Bluehill 2 材料测试软件为上代软件包的第二代产品。原软件包是一种全面集成的模块化软件包，可为当今的试验室管理人员及测试人员提供简单、量身定做的应用解决方案。Bluehill 2 软件不但可以用于标准的拉伸、压缩、弯曲、剥离、撕裂和摩擦试验，还增加了一些独特的新功能
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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. The low operating-force arms of the extensometer reduce the possibility of knife-edge slippage when testing hard or smooth surfaced materials.
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W-E402 Series Biaxial extensometers are ideally suited for testing anisotropic materials such as advanced composites as well as for general purpose tests such as determining Poisson’s ratio.
- 1.0 MB