航空复合材料电磁感应焊接强度试验研究

Experimental Study on the Strength of Electromagnetic Induction Welding of Aviation Composite Materials

为分析航空复合材料电磁感应焊接时焊接参数对层合板搭接接头力学性能的影响,探究不同焊接功率、焊接时间、焊接压力对碳纤维增强复合材料层合板焊接强度的影响规律,进行了航空复合材料电磁焊接强度试验。首先制备碳纤维复合材料层合板,设计三因素四水平正交试验,通过拉伸试验机获取焊接强度试验数据,确定最优电磁焊接组合参数;其次分别对三种焊接参数进行试验,分析不同焊接参数对碳纤维复合材料层合板焊接强度的变化规律。结果表明:焊接最优组合参数为焊接功率3.0 kW、焊接时间10 min、焊接压力1.0 MPa;对焊接强度影响程度最大的因素为焊接功率,影响程度最小的因素为焊接压力;当焊接功率为2.5 kW、3.0 kW,且焊接时间大于10 min时,随焊接时间增大,焊接强度逐渐减小。

Electromagnetic induction welding strength tests is done for aviation composite materials to analyze the influence of welding parameters on the mechanical properties of laminated plate lap joints during electromagnetic induction welding,and to explore the influence of different welding power,welding time,and welding pressure on the welding strength of Carbon Fiber Reinforced Plastic laminates.First,CFRP laminate samples are prepared.Orthogonal experiment of three factor and four level is designed to obtain welding strength by tensile testing machine,and optimal combination parameters of electromagnetic welding are determined.Secondly,three welding parameters are separately tested to analyze the change rule of different welding parameters on the welding strength of CFRP laminates.The test results relating welding parameters are as follows:welding power is 3.0 kW,welding time is 10 min,welding pressure is 1.0 Mpa.The most obviously influential factor on welding strength is welding power,while the welding pressure has the least influence.When the welding power is 2.5 kW or 3.0 kW,and the welding time is greater than 10min,the welding strength gradually decreases as the welding time increases.