Robustness of residual stresses in brake discs by metamodeling
2011 (English)In: proceedings of the ASME IDETC/CIE Conference, (Washington D.C., USA),2011, 2011Conference paper (Other academic)
During casting residual stresses are developed due to the solidification and cooling. In this work the robustness of residual stresses in casted brake discs with respect to variations in four parameters is evaluated. The parameters are Young’s modulus, yield strength and hardening, time of breaking the mould and the thickness of the brake disc. The robustness analysis is performed by Monte Carlo simulation of metamodels which are surrogates to a finite element model. Quadratic response surfaces and Kriging approximations are considered. Those are based on finite element analyses defined by a Latin hypercube sampled design of experiments. In the finite element analyses an uncoupled approach is utilized where a thermal analysis generates a temperature history of the solidification and cooling. Then follows a structural analysis which is driven by the temperature history. After casting the machining of the brake disc is analyzed by gradually removing elements in the finite element model. The results show that the variation in the studied parameters yield large variation in residual stresses. The thickness of the brake disc is the parameter that has largest influence to the variation in residual stresses. Furthermore, the level of the residual stresses are in general high and might influence the fatigue life of the brake disc.
Place, publisher, year, edition, pages
Robustness analysis, Metamodeling, Design of experiments (DoE), Residual stresses
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-72351OAI: oai:DiVA.org:liu-72351DiVA: diva2:459277
The ASME 2011 International Design Engineering Technical Conferences (IDETC) and Computers and Information in Engineering Conference (CIE), August 28-31, Washington, DC, USA