Finite Element Analysis of A Thermally Loaded Enamelled Steel Oven Cavity
Mert Cevdet Günay
Research and Development Engineer at Arçelik
Tarih ve Saat
18 Ekim 2017 - 12:00
Vitrous enamelling is a widely used method to protect the substrate surfaces from chemical attacks and physical damages. The enamel coating is manufactured by fusing the powdered glass to a substrate by firing, usually between 750 to 850 degrees Celcius. Due to ease of manufacturing and economical benefits, this technique has many applications in cookware, burners, laboratory equipment, silos, chemical reactors and heat exchangers. The powdered glass melts upon heating and covers the surface of the substrate. The glass coating solidifies as it is cooled back to room temperature, however, residual stresses arise due to the mismatch between thermal expansion coefficients of the layers. The residual stresses can cause buckling and warping in the structure which results in defected and out of-tolerance products. It is known that thermal properties and viscosity of enamel change significantly as a function of temperature. A finite element model which takes viscoelastic behavior of enamel into account was developed to predict the response of the structure<under thermal loading. The thermal dependence of material properties were obtained from experiments and subsequently integrated into the FE model. Using this method, structural deformations of new designs can be evaluated in order to avoid excessive buckling and warping during manufacturing. Validation of the FE model with analytical models and experiments will be performed.
Mert Cevdet Günay received his B.Sc Eng degree in Metallurgical and Materials Engineering from METU in 2012. He started his graduate education in METU and continues his studies at Yeditepe University. He began his career at Nurol Technologies Inc. as a research and development engineer, responsible for the development and manufacturing of ceramic / composite ballistic armors. Later he worked as a design engineer for Fontana Group where he concentrated on mechanical design of sheet metal forming molds and metal forming analysis. He is currently working as a research and development engineer at Arc ̧elik and focuses on structural analysis, metal forming analysis, drop / crash analysis of home appliances, topology optimization, multi-body dynamics and material modeling.