标题： 研究复合材料/金属界面及其对电阻测量的影响 显示英文标题

标题： Investigating the Composite/Metal Interface and its Influence on the Electrical Resistance Measurement

摘要： 碳纤维增强聚合物（CFRP）复合材料所带来的优势使其在许多应用中成为合适的选择，并成为传统材料的理想替代品。 使用CFRP复合材料的好处在于其轻质、高刚度以及耐腐蚀性。 因此，在飞机和风力涡轮机结构应用中，使用CFRP复合材料的趋势正在快速增长。 将传统的航空航天级金属合金（如铝、钛、镁等）替换为CFRP复合材料带来了新的挑战。 例如，飞机在飞行过程中容易遭受雷击。 为了承受如此大量能量的注入，需要具备足够的电性能，主要是电导率。 事实上，电导率（或其倒数，电阻）是一个关键参数，用于表示任何材料的变化，并可以作为健康监测的指标。 在本文中，AS4/8552碳/环氧层合复合材料被注入了两种类型的电流，脉冲电流和直流电。 记录了测量到的电阻变化。 在电流注入后出现了显著的电阻下降。 此外，对这些复合材料进行了四点弯曲测试，以将电阻变化与潜在的弯曲性能变化相关联。 无论是否注入电流，电阻变化与试样弯曲强度/模量变化之间没有明显的趋势。 然而，观察到电流的注入会影响接触电阻，使其电阻降低。 显示英文摘要

摘要： The advantages introduced by carbon fiber reinforced polymer (CFRP) composites has made them an appropriate choice in many applications and an ideal replacement for conventional materials. The benefits using CFRP composites are due to their lightweight, high stiffness, as well as corrosion resistance. For this reason, there is a fast growing trend in using CFRP composites for aircraft and wind turbine structural applications. The replacement of the conventional aerospace-grade metal alloys (aluminum, titanium, magnesium, etc.) with CFRP composites results in new challenges. For example, an aircraft during flight is prone to be struck by lightning. To withstand the injection of such massive amount of energy, adequate electrical properties, mainly electrical conductivity, is required. In fact, electrical conductance (or its reciprocal, resistance) is a critical parameter representing any material change and it can be considered an index for health monitoring. In this paper, AS4/8552 carbon/epoxy laminated composites were injected with two types of electrical currents, impulse current and direct current. The change in measured electrical resistance was recorded. A significant resistance drop occurred after electrical current injections. Furthermore, four-point flexural tests were performed on these composites to correlate an electrical resistance change with a potential flexural property change. There was no clear trend between a resistance change and flexural strength/modulus change of the test coupons, regardless of current injection. However, it was observed that the injection of the current affects the contact resistance such that its resistance decreases.