Experimentally validated physics-based multi-scale models for long-term durability assessment of next-generation lightweight composite vehicles

几十年来，运输车辆已经将聚合物基质复合材料（PMC）材料用于二级结构部件，包括飞机空气动力学整流罩和内部汽车面板，这是因为与金属合金相比，它们具有高强度和低重量。直到最近几年，它们才被用于主要结构，这源于经济和社会问题迫使制造商开发更轻的节能车辆。因此，PMC的长期可靠性现在非常重要，特别是对于具有疲劳关键性能指标的部件，例如汽车底盘侧梁和飞机翼梁。然而，存在着一个重大的科学差距，以解决他们的性能在复杂的负载条件下。

For decades transportation vehicles have utilized polymer matrix composite (PMC) materials for secondary structural components, including aircraft aerodynamic fairings and interior automobile panels, due to their high strength and low weight when compared to metallic alloys. Only in recent years have they been utilized for primary structures, which stems from economic and societal concerns pressuring manufacturers to develop lighter fuel-efficient vehicles. Consequently, the long-term reliability of PMCs is now highly important, in particular for components with fatigue critical performance indicators such as automobile chassis side beams and aircraft wing spars. However, there exists a major scientific gap for addressing their performance under complex loading conditions.