Modeling Method of Specimen Repair Techniques from Polymer Composite Material

Paper describes three main repair techniques of aircraft polymer composite material structures: adhesive bonded external repair, mechanically fastened external doubler, stepped (overlapping) repair. Modeling method of this techniques is then proposed, justified and performed in Siemens Simcenter 3D. Results of each technique are analyzed and compared to each other. Main conclusions are: suggested modelling method is proved to be informative and reliable; bonded external repair and mechanically fastened external doubler technics are fast, but not firm repair methods, while stepped repair is more preferable for loaded structures utilized in long-term life cycles, required smooth skin finish.