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铝合金桨根表面处理对碳纤维粘接性能的探讨
首发时间：2024-06-25
摘要：针对碳纤维复合材料桨叶，叶片与轮毂连接部位多采用金属结构，该金属结构多为航空级7075铝材，以保证连接的可靠性。叶身复合材料与铝材桨根的连接可靠性是设计难点，铝材桨根伸出部位设置有过渡弧面类似波浪形结构、弧度变化平缓，保证复材桨叶根部的宽弦长和防甩脱设计，碳梁根部铺设在金属桨根粘接界面上，对铝材表面粘接性能提出更高的要求，仿真计算难以模拟异型波浪型弧面粘接性能，结合实际应用，分析铝材桨根实物三种不同表面处理方式，试验验证其可靠性得到最佳表面处理方式：粘接界面表面喷砂，粘接应力可达10.6mpa，10万次疲劳试验后，铝合金桨根与碳纤维复材样件产品完好，无明显断裂、磨损及其他形式的损坏，剩余极限拉拔破坏残余36.8kn拉出力。
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discussion on the bonding properties of carbon fiber by surface treatment of aluminum alloy paddle
abstract：for carbon fiber composite paddles, the connection between the blade and the hub is mostly made of metal structure, which is mostly made of aviation-grade 7075 aluminum to ensure the reliability of the connection. the connection reliability of the blade body composite material and the aluminum paddle root is a design difficulty, the aluminum paddle root extension part is provided with a transition arc similar to the wave-shaped structure, and the arc changes gently, so as to ensure the wide chord length and anti-throwing design of the composite paddle root, the carbon beam root is laid on the metal paddle root bonding interface, which puts forward higher requirements for the surface bonding performance of the aluminum material, and the simulation calculation is difficult to simulate the adhesion performance of the special-shaped wavy arc surface. the test verifies its reliability and obtains the best surface treatment: sandblasting on the surface of the bonding interface, the bonding stress can reach 10.6mpa, after 100,000 times of fatigue test, the aluminum alloy paddle root and carbon fiber composite sample products are intact, there is no obvious fracture, wear and other forms of damage, and the remaining pull-out force is 36.8kn for the residual break-out force of the remaining pull-out limit.
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