Recently, some efforts have been made to study and develop the polymeric friction stir spot welded (FSSW) joints. The application of this type of welding process in the single strap joints of low density polyethylene (LDPE) plates is the main subject of this paper in which, the failure loads of different polyethylene FSSW single strap joints fabricated with different welding parameters are studied experimentally and numerically. To do so, a full factorial design of experiments is used, and the effects of welding parameters such as tool rotational speed, plunge rate, dwell time and tilt angle are investigated. A large deformation assumption is used to develop a finite element model of the FSSW single strap joint. It is observed that a good consistency exists between experimental and numerical results with errors of less than 8%. Also, it has been shown that the tool plunge rate and tilt angle have remarkable effects on the strength of the FSSW single strap joint. By selecting an appropriate combination of welding parameters, joint strength is improved by a factor of 11 with respect to the case study with the weakest strength.

最近，已经做出一些努力来研究和开发聚合物摩擦搅拌点焊（FSSW）接头。这类焊接工艺在低密度聚乙烯（LDPE）板的单带接头中的应用是本文的主要主题，在该试验中，通过实验研究了不同焊接参数制造的不同聚乙烯FSSW单带接头的破坏载荷，数值上。为此，使用了完整的因子设计实验，并研究了焊接参数（例如工具转速，切入速率，停留时间和倾斜角）的影响。使用大变形假设来开发FSSW单带接头的有限元模型。可以观察到，实验结果与数值结果之间存在良好的一致性，误差小于8％。也，结果表明，刀具的切入速率和倾斜角度对FSSW单带接头的强度具有显着影响。通过选择合适的焊接参数组合，相对于强度最弱的案例研究，接头强度提高了11倍。