Thermo-press molding process simulation and experiment for polyetherketoneketone personalized cranial implant
The prevalence of adult skull defects caused by trauma,tumor resection,and other factors necessitates the need for patient-specific artificial cranial implants in clinical practice.Traditional metal materials,such as titanium alloys,often exhibit mismatches in thermal and mechanical properties compared to nature bone,prompting the ex-ploration of alternative materials.Polyether-ketone-ketone(PEKK)material has emerged as a promising candidate due to its similarity to human bone tissue in thermal and mechanical properties,exceptional wear resistance,stable physical and chemical properties,and good biocompatibility.This study aims to construct a Johnson-Cook constitu-tive model for PEKK based on tensile experimental data,and subsequently simulate the hot-pressing forming process for PEKK patient-specific cranial implants under varying forming temperatures and blank holding forces using finite element simulation.The optimization of hot-pressing forming parameters is conducted to obtain the most suitable conditions for PEKK cranial implant fabrication,and the efficacy of the proposed forming process is verified through PEKK cranial implants forming experiments.
patient-specific artificial cranial implanthot-pressing formingpolyetherketoneketone(PEKK)Johnson-Cook constitutive model
万方数据
维普
