Abstract
To clarify the loosening and coming out behavior, a ceramics sleeve is analyzed by using FEM when the sleeve is shrinking fitted to two steel shafts at both ends. Extremely low shrink fitting ratios are used to the ceramics roller because of the brittleness of the ceramics. Therefore the steel shafts shall be loosen out in such low shrink fitting ratios. In this study, therefore, two types of simulation are considered, one assumes an applied load to the shaft varying along the circumferential direction of the shaft at the certain interval to simulate rotating bending, and the other assumes pulling the shaft by tension. It is found that for the tensile pull out with decreasing the friction coefficient μ between the shaft and sleeve the separation happens more easily. However, for the rotating bending coming out, with decreasing different mechanism for separation may be seen depending on the number of cycle for loading, and sometimes unstably phenomenon is observed.
