To study the stress distribution characteristics of surrounding rock and spalling mechanism deep hard tunnels with different arch heights, complex variable function angle-preserving transformation method in elasticity theory were applied to analytic solution tangential during adjustment. In addition, true triaxial tests conducted on granite cube specimens (100 mm × 100 mm) containing holes thre...

Electromechanical actuators (EMAs), as the critical actuator system of next-generation aircraft, have attracted attention many institutions and enterprises around world. However, due to harsh working conditions, their reliability cannot satisfy requirements widespread application in aircraft. Therefore, order conduct fault diagnosis on EMAs, this paper, we establish a comprehensive dynamic mode...

Abstract Concrete exposed to fire can experience spalling when the pore pressure increases due water evaporation resulting in damage part of concrete cross-section which causes loss initial cross-sectional symmetry, both thermal and geometrical. This may lead what is, essence, a biaxial bending problem reinforced columns. study does not deal with prediction occurrence for fully coupled hygro-th...