Mechanical Behavior of Tubular Freeze-Cast Substrates with Organized Pore Structure

Despite the high potential of freeze-casting technique for production porous inorganic substrates, there is a lack studies on tubular geometries and their mechanical behavior under different pressure scenarios. In this work, freeze-cast alumina substrates was assessed by mathematical models from experimental O-ring tests. The stress distributions revealed concentration tensile stresses (within 0.2-25.0 MPa) plane load, causing brittle fracture. Furthermore, results confirmed that honeycomb model material adequately predicted strength substrates. Finally, fracture criteria used to estimate maximum homogeneously distributed pressures, such as in fluids, can withstand. This configuration represents more precisely practical conditions, though hard experimentaly replicate. Therefore, developed procedure paramount simulate behaviour real operating conditions.