Abstract
In this study, lateral compression tests and tensile tests for Mullite circular tubes were carried out at static rates. Theoretical and numerical analyses for the deformation of ceramic tubes in lateral compression were also performed. In considering the deformation of ceramic circular tubes in lateral compression, elastic contact with flat plate and tube surface was taken into account as well as the bending of the curved wall of the tubes. Young's modulus of ceramic tubes obtained from lateral compression tests agreed well with that obtained from tensile tests. A simple equation which enables easy calculation of the fracture stress in lateral compression tests was obtained using FEM analysis. From the comparison with the two-dimensional analytical solution, it was found that the equation was applicable to lateral compression tests of relatively thick-walled tubes up to h/Do=1/3 (Do : outer diameter, h : wall thickness of circular tubes). It was also found that the fracture stress in lateral compression was about 1.5 times greater than the tensile strength of ceramic tubes.
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