Abstract：Ceramic core is used to form the cooling channel of hollow turbine blade in investment casting process.
The bending and torsion deformations of ceramic core have direct influence on the wall thickness dimension accuracy of
turbine blade. To study bending and torsion deformation of ceramic core generating in manufacturing process, firstly, based
on the definition of bending and torsion deformations for airfoil and the structure characteristics of ceramic core, the algorithms
for computing bending and torsion deformations of ceramic core are studied, including contour-based methods:
Snake-model, spline-fitting method and point-based methods: Convex-hull, 2D-registration, distance-weight method. Secondly,
through computing a simulated known bending and twist deformation, these five methods are compared. The comparing
results indicate that the accuracy and stability of spline-fitting method is better than other methods.
2016, 
