The in-plane shear behaviour of an uncured composite material (i.e. prepreg sheet, dry fibre preforms etc) is one of the key parameters that influences wrinkles generation in advanced composites manufacturing processes such as automated fibre placement (AFP) and thermoforming. However, there is no standardised test method for the characterisation of uncured unidirectional prepreg subjected to pure shear loading. In this paper, a 10° off-axis tensile test is developed, and the method’s suitability is demonstrated on two different materials. The mechanical response is analysed over a range of testing rates and temperatures that are consistent with the real manufacturing process parameters. The results demonstrate the feasibility of the test method for extracting relevant material characteristics and the strain-rate and temperature dependency of the material response.

未固化复合材料（即预浸料片，干纤维预成型件等）的面内剪切行为是影响先进复合材料制造过程（例如自动纤维铺放（AFP）和热成型）中皱纹产生的关键参数之一。但是，没有用于表征纯剪切负荷下未固化的单向预浸料的标准测试方法。本文开发了一种10°离轴拉伸试验，并证明了该方法在两种不同材料上的适用性。在与真实制造工艺参数一致的测试速率和温度范围内分析机械响应。