Spall Evolution in a Rolling Element Bearing

International audienceRolling element bearing (REB) is one of the basic mechanical components in rotating machinery. It is common to divide the REB wearinto two stages,damage initiation and damage propagation. There hasbeen a growing awareness of the need to understand the damage mechanism during the propagation phase. The current work includes a discussion on the ongoing research and the methodology for the development of the prognostic method for damage propagation. The methodology integrates experiments, diagnostic methods, and physics-based models. Endurance tests were conducted in order to learn about the damage propagation processand model validation. Furthermore, Finite Element model of the spalled bearing was developedand validated. The FE model aims to investigate and simulate the damage propagation process. The simulation results are in good agreement with the experimental observation

Visualization of texture components using MTEX

Knowledge of the appearance of texture components and fibres in pole figures, in inverse pole figures and in Euler space is fundamental for texture analysis. For cubic crystal systems, such as steels, an extensive literature exists and, for example, the book by Matthies, Vinel & Helming [Standard Distributions in Texture Analysis: Maps for the Case of Cubic Orthorhomic Symmetry, (1987), Akademie-Verlag Berlin] provides an atlas to identify texture components. For lower crystal symmetries, however, equivalent comprehensive overviews that can serve as guidance for the interpretation of experimental textures do not exist. This paper closes this gap by providing a set of scripts for the MTEX package [Bachmann, Hielscher & Schaeben (2010). Solid State Phenom.160, 63–68] that allow the texture practitioner to compile such an atlas for a given material system, thus aiding orientation distribution function analysis also for non-cubic systems