Fracture Strength on Fiber-Bonded Ceramic Composite Subjected to Static and Dynamic Bending.

Abstract

Finite-element analysis was performed 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 comparison with the predicted stress distributions. It is determined that 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 were significantly increased with the rise in the deformation rate.