1998 Volume 41 Issue 4 Pages 495-502
Finite-element analysis(FEM) wasperformed to characterize the deformation behavior of ceramic composite material during static and dynamic bending. Normal and shearing stress distributions were clarified by FEM with respect to elastic anisotropy and the specimen height-to-span ratio(H/L), and the tensile and shearing fracture behaviors were well understood in terms of the predicted stress distributions. Well-ramped impact bending leads to almost identical stress distributions as static bending and, consequently, the fracture strength of brittle materials can be measured at a high deformation rate. Tensile and shearing strengths increased significantly with the rise in the deformation rate.