复合材料货舱地板立柱压溃响应试验

复合材料已经在民用飞机结构上得到广泛应用，并逐渐应用到主承力结构中，复合材料的脆性特点给飞机的适坠性设计和评估提出了新的挑战。复合材料机身货舱地板支撑立柱作为坠撞过程中的重要吸能元件，对机身结构抗坠撞性能有重要影响。复合材料货舱地板支撑立柱在压溃失效模式下吸收的能量明显多于整体弯曲失效模式。根据民用飞机复合材料货舱地板立柱的设计需求，对不同试件触发模式、高度、截面形式、截面面积等设计参数变化的T700GC碳纤维/环氧树脂复合材料立柱开展准静态和动态压溃试验，得到立柱吸能特性的关键影响参数和设计因子。 

Crush experiment of composite cargo floor stanchions

Composite materials have been widely used in aircraft structures, and gradually applied to the main load-bearing structures. However, the brittle characteristic of composite materials has brought new challenges for aircraft crashworthiness design and evaluation. As the important energy-absorbing element, the composite stanchions for the cargo floor structure seriously affect the crashworthiness properties of composite fuselage. Composite stanchions can be designed to absorb much more energy through crushing failures than in a brittle global buckling mode. Based on the design requirements of the civil aircraft composite cargo floor stanchion, the trigger configuration, height, section, and section area were evaluated using quasi-static and dynamic crushing tests. The key influence factors of energy absorption characteristic properties for woven T700GC carbon fiber/epoxy composite stanchions were estimated. It provides reference for the structure design.