Analysis of Blade Forming using an Elasto-Plastic Finite Element Method with Directional Reduced Integration

선향적저감적분을 이용한 탄소성 유한요소법에 의한 블레이드의 성형 해석

Numerical simulation of blade forming is carried out as stretch forming by an elasto-plastic finite element method. The method adopts a Lagrangian formulation, which incorporates large deformation and rotation, with a penalty method to treat the contact boundary condition. Numerical integration is done with a directional reduced integration scheme to avoid shear locking. The numerical results demonstrates various final shapes of blades which depend on the variation of the stretching force. The strain distributions in deformed blades are also obtained with the variation of the stretching force.