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

几十年来，由于与金属合金相比，聚合物基复合材料（PMC）具有高强度和低重量，因此运输车辆已将其用于二级结构部件，包括飞机气动整流罩和汽车内饰板。直到最近几年，它们才被用于初级结构，这源于经济和社会方面的考虑，迫使制造商开发更轻的节能汽车。因此，pmc的长期可靠性现在非常重要，特别是对于具有疲劳临界性能指标的部件，如汽车底盘侧梁和飞机翼梁。然而，在复杂载荷条件下研究其性能还存在很大的科学空白。

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.