R-Curves in Al2O3 –- Al2O3/ZrO2 laminates
R-Curves in Al2O3 –- Al2O3/ZrO2 laminates
In order to better understand the fracture behavior of Al2O3-Al2O3/ZrO2 laminates, controlled crack growth experiments were carried out. The method proposed consists of a three-point bending test of a sandwich beam in which a notched specimen is located in between two metallic bars. Under certain conditions that will be commented, stable crack growth can be obtained. The fracture pattern is related to the residual stresses present in the laminate. R-curves for the laminate were also calculated using the weight function method, including the influence of the free surface. Toughness values are presented in the R-curve after friction considerations.
toughness, ceramic laminates, Controlled Crack Growth
toughness, ceramic laminates, Controlled Crack Growth
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