工艺与制造英文2023被引 9
低熔点聚芳醚酮碳纤维增强热塑性复合材料搭接件的摩擦搅拌焊接
Friction stir welding of lapped low-melt polyaryletherketone carbon fiber reinforced thermoplastic laminate
Lucas T Wilkins, Alvin M Strauss · Vanderbilt University Welding Automation, Lab Department of Mechanical Engineering, Vanderbilt University, Nashville, TN, USA
摘要整理
碳纤维增强热塑性复合材料（CFRTP）因其优异的可加工性和可焊性在航空航天结构中的应用日益增加。本研究采用摩擦搅拌焊接（FSW）技术对低熔点聚芳醚酮（LMPAEK）碳纤维增强复合材料进行搭接焊接。研究创新性地将FSW技术应用于连续碳纤维织物层合板复合材料。FSW工艺会破坏焊接区域内的纤维，并将其分散成长度仅为数微米的碎片。热分析表明，由于破碎碳纤维周围聚合物流动性增强，焊接区域的降解温度比基体层合板材料低40°C。虽然优化后的焊接接头存在超过9%的孔隙率，但其拉伸强度可达73.8 MPa，与短碳纤维增强复合材料相比保持了约50%的接头效率。CFRTP在FSW过程中所需的加工力低于金属材料，强度优化焊接的横向运动功率消耗仅为67 W，保持了能源高效的特点。
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