Fiber reinforced polymers are massively used as an alternative to metals in structural applications. The brittle nature of their matrix, however, makes them more susceptible to crack formation and propagation resulting in costly repair operations and increased environmental impact. Intrinsic healable composites provide a good alternative to these conventional composite materials, whereas their mechanical properties in static solicitation or impact testing are well documented, only few studies address fatigue testing. This research focuses on 3-point bending fatigue tests of polymer-blend based healable E-glass composite materials. The S–N curve was first built to compare the fatigue behavior of the healable system to a conventional epoxy composite. A statistical approach based on Weibull statistics was developed to predict the failure probability as a function of the applied stress amplitude, to compare both systems at equivalent probability of failure. The healable system showed a higher fatigue resistance at high cycle fatigue. Furthermore, a full stiffness recovery was obtained and a life extension of at least five times compared to the reference system when healed after reaching a 90% chance of survival. The healable system thus opens new perspectives for more sustainable load-bearing composites.

纤维增强聚合物在结构应用中被广泛用作金属的替代品。然而，它们的基体的脆性使它们更易于裂纹形成和扩展，从而导致昂贵的维修工作和增加的环境影响。本征型可修复复合材料提供了这些常规复合材料的良好替代品，而在静态拉拔或冲击测试中其机械性能已得到充分证明，只有很少的研究涉及疲劳测试。这项研究的重点是基于聚合物共混物的可修复电子玻璃复合材料的三点弯曲疲劳测试。首先建立S–N曲线，以比较可修复系统与常规环氧复合材料的疲劳性能。开发了一种基于威布尔统计量的统计方法来预测作为施加应力幅度的函数的失效概率，以比较两个系统在等效失效概率下的失效概率。在高循环疲劳下，可修复系统显示出更高的抗疲劳性。此外，在达到90％的生存机会后得到治愈后，与参考系统相比，可以获得完全的刚度恢复，并且寿命至少延长了五倍。因此，可修复系统为更可持续的承重复合材料开辟了新的前景。在达到90％的生存机会后，完全恢复了硬度，并且与参考系统相比，寿命至少延长了五倍。因此，这种可修复的系统为更加可持续的承重复合材料开辟了新的前景。在达到90％的生存机会后，完全恢复了硬度，并且与参考系统相比，寿命至少延长了五倍。因此，可修复系统为更可持续的承重复合材料开辟了新的前景。