ISO 14129 specifies a procedure for determining the in-plane shear stress/shear strain response, including in-plane shear modulus and shear strength of
fiber-reinforced plastic composites by means of a ± 45° tensile test method. The method is applicable to thermoset and thermoplastic matrix laminates made
of unidirectional plies and/or fabrics (including unidirectional fabrics) with fibers at ± 45° to the specimen axis, where the layup is symmetrical and balanced about
the specimen midplane. Typically, the specimen needs to be strained to measure parallel and perpendicular directions, and we will use an extended channel module
for strain conditioning and output.
ISO 14129 describes how to apply a tensile load to a specimen consisting of a rectangular cross-section bar with fibers at ± 45° to the specimen axis. To determine
the shear modulus, the strain needs to be measured parallel and perpendicular to the specimen axis. Composites are often used in aerospace, automotive and energy
applications, so it is critical to understand how the material strength is affected under real conditions. For example, for meeting NADCAP requirements, we can provide a viable solution.
We offer a variety of clamping solutions, such as pneumatic or hydraulic grips, which can be used in this application depending on the material being tested. Additionally, we recommend
reviewing ISO 14129 in its entirety to understand the test setup and result requirements relevant to the material you are testing.
