纤维增强塑料复合材料.用双梁剪切试验测定层间强度和模量

[中文适用范围]： 本文件规定了通过纤维增强塑料复合材料的双梁剪切 (DBS) 测试确定层间强度和模量的程序。 该方法适用于具有热固性基体的玻璃或碳纤维增强塑料复合材料，只要获得可接受的层间失效即可。 本文件仅适用于具有对称和平衡铺层的层压板，因为它可以避免弯曲/扭曲或弯曲/延伸耦合变形（见 6.2）。 优选的铺层是单向的，纤维沿着样本（轴向）长度排列。 通过试验来评估该测试对特定铺层、基体和纤维（例如天然纤维）的适用性，以确保获得正确的分层失效。 [外文原描述]： This document specifies a procedure for determining the interlaminar strength, and modulus, by double beam shear (DBS) tests of fibre-reinforced plastic composites. The method is suitable for use with glass or carbon fibre-reinforced plastic composites with thermoset matrices, providing an acceptable interlaminar failure is obtained. This document only applies to laminate with a symmetrical and balanced lay‐up as it avoids bending/twisting or bending/extension coupling deformations (see 6.2). The preferred lay-up is unidirectional, with fibres aligned along the specimen (axial) length. The suitability of the test for specific lay-ups, matrices and fibres (e.g. natural) are assessed by trial tests to ensure the correct delamination failures are obtained.