... specimens. The three different shear loading configurations of dynamic fatigue, static fatigue, and cyclic fatigue were employed to assess their individual respective lives. The MI SiC/SiC CMC exhibited low susceptibility to fatigue (“slow crack growth”) regardless of loading configuration. A life...

... are reported. The paper covers the testing strategy applied and information on crucial material parameters like improved low cycle and high cycle fatigue (HCF) behavior while keeping good stress corrosion cracking (SCC) resistance and corrosion fatigue (CF) properties. Furthermore, first manufacturing...

... OF E NGINEERING FOR G AS T URBINES AND P OWER . Manuscript received September 1, 2017; final manuscript received September 27, 2017; published online January 23, 2018. Editor: David Wisler. 01 09 2017 27 09 2017 Computational Energy Fatigue Modeling Fracture prediction...

...C. H. Richter; U. Krupp; M. Zeißig; G. Telljohann Slender turbine blades are susceptible to excitation. Resulting vibrations stress the blade's fixture to the rotor or stator. In this paper, high cycle fatigue at the edge of contact (EOC) between blade and rotor/stator of such fixtures...

... OF E NGINEERING FOR G AS T URBINES AND P OWER . Manuscript received May 12, 2017; final manuscript received July 25, 2017; published online October 17, 2017. Editor: David Wisler. 12 05 2017 25 07 2017 Computational Fatigue Heat transfer Intelligent control Modeling Thermal...

... cycles to reduce time while providing more frequent start-up events. All these actions result in much higher levels of thermostresses, a lifetime consumption of primary components and an increased demand for accurate thermostructural and low cycle fatigue (LCF) simulations. In this study, some aspects...

...Robert Eriksson; Zhe Chen; Krishna Praveen Jonnalagadda Thermal barrier coatings (TBCs) are ceramic coatings used in gas turbines to lower the base metal temperature. During operation, the TBC may fail through, for example, fatigue. In this study, a TBC system deposited on a Ni-base alloy...

...Weizhe Wang; Sihua Xu; Yingzheng Liu The aim of this study was to investigate the cyclic creep–fatigue interaction behavior in a steam turbine inlet valve under cyclic thermomechanical loading conditions. Three years and nine iterations of idealized startup–steady-state operation–shutdown process...

... to calculate online damage and support CBM decision. Then the stress and temperature distribution of blades will become as the input of the creep damage analysis model and the fatigue damage analysis model. The interactive damage of blades will be evaluated based on the creep and fatigue analysis results...

...M.-H. Herman Shen; Sajedur R. Akanda An energy-based framework is developed for welded steel and AL6061-T6 for assessment of nonlinear evolution of fatigue damage accumulation along fatigue life. The framework involves interrogation at continuum using a newly developed experimental procedure...

...Xijia Wu; Zhong Zhang; Leiyong Jiang; Prakash Patnaik Nozzle guide vanes (NGV) of gas turbine engines are the first components to withstand the impingement of hot combustion gas and therefore often suffer thermal fatigue failures in service. A lifting analysis is performed for the NGV of a gas...

... September 13, 2016. Editor: David Wisler. 19 06 2016 03 07 2016 Fatigue Finite element fracture Gas turbine technology Fracture prediction As gas turbine continuously elevates the gas inlet temperature to improve their efficiency, thermal barrier coatings (TBCs) obviously...

... in order to participate in day-to-day power markets. Energy systems Fatigue Thermodynamics Control systems 10 07 2015 26 06 2016 Contributed by the Turbomachinery Committee of ASME for publication in the J OURNAL OF E NGINEERING FOR G AS T URBINES AND P OWER...

... , l = 1 , 2 , … Fatigue Finite element methods Nonintrusive diagnostics Structural dynamics Vibration Fracture prediction 21 06 2016 22 06 2016 Contributed by the Structures and Dynamics Committee of ASME for publication in the J OURNAL OF E NGINEERING...

...Weizhe Wang; Patrick Buhl; Andreas Klenk; Yingzheng Liu A continuum damage mechanics (CDM) based viscoplastic constitutive model is established in this study to describe the fully coupling of creep and fatigue behavior. The most significant improvement is the introduction of a continuum damage...

...Xijia Wu; Zhong Zhang Deformation and damage accumulation occur by fundamental dislocation and diffusion mechanisms. An integrated creep–fatigue theory (ICFT) has been developed, based on the physical strain decomposition rule that recognizes the role of each deformation mechanism, and thus relate...

..., there is considerable redistribution of stresses and strains due to inelastic deformations during the crack initiation phase. Therefore, the subsequent crack growth occurs through a material with significant residual stresses and strains. In this work, fatigue crack propagation experiments, including the initiation...

...Christian Busse; David Gustafsson; Patrik Rasmusson; Björn Sjödin; Johan J. Moverare; Kjell Simonsson; Daniel Leidermark In this paper, the possibility to use linear elastic fracture mechanics (LEFM), with and without a superimposed residual stress field, to predict fatigue crack propagation...

... to bring a product to market, and increase the likelihood of failure-free operation. This paper presents an approach using equivalent low-cycle fatigue (LCF) material properties which avoids the need to explicitly model the morphology of the microstructure in the region of the microporosity...

... NGINEERING FOR G AS T URBINES AND P OWER . Manuscript received July 14, 2015; final manuscript received August 13, 2015; published online October 13, 2015. Editor: David Wisler. 14 07 2015 13 08 2015 Fatigue Turbines Welds Weld modeling The power plant turbo set consists...