Push-out is one of the available techniques to assess the bond strength between the reinforcing fibres and the matrix in composite materials. The test is conducted on thin sections of composite, and a small indenter is used to apply increasing load on single fibres while measuring the displacement, until the debonding occurs. This study used push-out tests to assess the debonding mechanism of carbon fibres in an epoxy matrix. The tests were conducted at multiple loading rates (0.1 mN/s, 1 mN/s and 10 mN/s) and temperatures (24 °C and 125 °C). The results were analysed and contrasted with scanning electron microscopy and atomic force microscopy observations. The data showed evidence of push-out events and provided new insights into the contribution of the viscoelastic behaviour of the fibre/matrix interface and/or the matrix. This finding could pave new pathways for improving the bond strength between the carbon fibres and the matrix in composite materials.

推出是评估复合材料中增强纤维与基体之间粘结强度的可用技术之一。该测试是在复合材料的薄截面上进行的，并使用一个小压头在测量位移的同时对单根纤维施加增加的载荷，直到发生剥离。这项研究使用推出测试来评估环氧基质中碳纤维的脱粘机理。测试是在多种加载速率（0.1 mN / s，1 mN / s和10 mN / s）和温度（24°C和125°C）下进行的。分析结果并与扫描电子显微镜和原子力显微镜观察结果进行对比。数据显示了推出事件的证据，并为纤维/基质界面和/或基质的粘弹性行为的贡献提供了新的见解。