Ceramic Failure Stress

Obtained from uni axial tests.

Ceramic failure stress.

Bi axial failure criteria for different weibull parameters. Failures in ceramic materials often occur when a tensile stress causes a fracture to propagate through the material. Properties affecting thermal stress resistance of. Ceramic materials are brittle.

Multi axial loading there is a multi axial state of stress in many ceramic components. They are strong when loaded in compression but weak when loaded in tension. Fracture surfaces contain important information about the cause of the fracture and. Therefore a failure criterion has to be applied to predict the failure load from material data fig.

Factors affecting thermal stress resistance of ceramic materials by w. Now let s look at a surface crack in a ceramic. Unlike in a metal the atoms of the ceramic cannot move easily past one another. So instead of the material blunting the surface crack as occurs in metals in a ceramic the stress from the crack ends up concentrated at the point of the crack.