Wei Donglu, Gu Yizhuo, Zhu Hanrui, Li Min, Wang Shaokai
School of Materials Science and Engineering, Beihang University, Beijing 100191, China.
Research Institute for Frontier Science, Beihang University, Beijing 100191, China.
Polymers (Basel). 2022 Jun 23;14(13):2563. doi: 10.3390/polym14132563.
An experimental investigation on the resistance welding of carbon-fiber-reinforced polyetheretherketone (PEEK) composite laminate using three types of stainless steel (SS) meshes with different sizes and electrical resistances as heating elements is reported. The objective of this study is to determine the influence of the metal mesh on the welding process and performance at different power densities ranging from 29 to 82 kW/m. Resistance welding equipment is used to monitor the temperature and displacement along the thickness of the laminate. The results show that the power density determines the welding time and heat concentration. A large power density results in a short welding time, but also increases the temperature gradient at the joining interface (almost 50 °C) and causes an obvious deformation of a contraction of more than 0.1 mm along the thickness of the laminate. A SS mesh with low resistance has a strong welding capability, i.e., a high welding efficiency under low power density. A lap shear strength of approximately 35 MPa can be obtained with the appropriate power density. The shear strength is affected by the bonding between the metal mesh and polymer, the metal mesh load bearing, and the metal mesh size.
报道了一项关于使用三种不同尺寸和电阻的不锈钢（SS）网作为加热元件对碳纤维增强聚醚醚酮（PEEK）复合层压板进行电阻焊接的实验研究。本研究的目的是确定金属网在29至82kW/m的不同功率密度下对焊接过程和性能的影响。使用电阻焊接设备监测层压板厚度方向上的温度和位移。结果表明，功率密度决定焊接时间和热集中程度。高功率密度导致焊接时间短，但也会增加连接界面处的温度梯度（近50°C），并使层压板厚度方向上产生超过0.1mm的明显收缩变形。低电阻的SS网具有较强的焊接能力，即在低功率密度下具有较高的焊接效率。在适当的功率密度下可获得约35MPa的搭接剪切强度。剪切强度受金属网与聚合物之间的粘结、金属网承载能力和金属网尺寸的影响。
