Solutions of stress intensity factors for external and internal unpressurized and pressurized surface cracks in internally pressurized thick-walled reactor pressure vessels are determined directly by a three-dimensional displacement-hybrid finite element method. The finite element method is based on a rigorous modified variational principle of the total potential energy, with arbitrary element ...

To solve the problem of tension stress caused by centrifugal force and high-speed operation permanent magnet (PM) rotor, a FeCo-based PM rotor structure model is proposed. Based on thick-walled cylinder theory, uniform analytical calculation formulas strain field, displacement field are derived, stresses sleeve obtained. The correctness method (ACM) verified finite element (FEM). derived formul...

An adaptive matrix inverse (AMI) method is presented to identify the temperature and unknown boundary heat flux in a domain of regular or irregular shape with temperature-dependent properties. The nonlinear problem broken down into number linear submodels, for each submodel, obtained measuring points. Next, based on matching degree between temperatures measured calculated by prediction submodel...

Three new genera are established in the Sordariomycetidae based on morphological and molecular data (SSU and LSU nrDNA) to accommodate five ascomycete species collected from submerged woody debris in freshwater habitats from Costa Rica. The genus Bullimyces contains three new species, B. communis, B. costaricensis and B. aurisporus. Bullimyces is characterized by globose to subglobose, membrano...