By examining the state of the art, it can be realised that few research works have been done on the fracture behaviour of plastic composites reinforced with continuous glass fibres. Therefore, the present paper deals with the fracture toughness of a unidirectional glass fibre‐reinforced plastic (GFRP), such a parameter being analytically determined by means of the modified two‐parameter model (MTPM). The input data of the MTPM are obtained from an experimental campaign related to three‐point bending tests on single edge‐notched specimens characterised by different sizes. The novelty of this research work is that the MTPM, originally proposed for isotropic materials, is here employed to estimate the fracture toughness of GFRPs characterised by orthotropic mechanical properties.

中文翻译：

---

玻璃纤维增​​强塑料复合材料的断裂韧性表征

通过检查现有技术，可以认识到很少有关于用连续玻璃纤维增​​强的塑料复合材料的断裂行为的研究工作。因此，本文讨论了单向玻璃纤维增​​强塑料（GFRP）的断裂韧性，该参数是通过修改的两参数模型（MTPM）解析确定的。MTPM的输入数据来自与针对具有不同尺寸特征的单边缺口试样的三点弯曲试验有关的实验活动。这项研究工作的新颖之处在于，最初用于各向同性材料的MTPM在这里用于估算以正交各向异性力学特性为特征的GFRP的断裂韧性。