Study of the Residual Stresses Variation into the Sandwich Structure Subjected to Thermomechanical Loading

Abstract

The assembly of different types of materials like metals and ceramics forms a structure called sandwich structure, which need advanced techniques to joint it together like the thermo compression. However, the rise of residual stress caused by the discontinuity of nature of this type of sandwich material, like incompatibility of the characteristics, which creates a risk of rupture of the structure and limited the using range of these types of materials. In this paper, we study the bonding of ceramic and metal and we will focus on the role played by the ceramic element in the stress state of ceramic/ metal interface and the stresses evaluation by Finite Element when the structure is subjected to thermo-Mechanical loading.

Review of Specific Performance Parameters of Vertical Wind Turbine Rotors Based on the SAVONIUS Type

“…The SAVONIUS rotor type represents a simple constructive variant that can be achieved with low costs, characterized by lower power coefficient (CP) values compared to horizontal-axis rotor types [5][6][7][8]. By comparison, the horizontal-axis turbine's rotor reaches 45% CP values, and the DARRIEUS vertical-axis rotor type reaches CP values up to 35%, whereas the classical SAVONIUS rotor with a 15% CP is located far behind but can compensate with other features related to its simple construction, low production cost, independence of wind direction, as well as good starting torque at low wind velocity values [9][10][11][12][13][14].…”