Results 31 to 40 of about 151,301 (310)

Investigation of very high cycle fatigue by thermographyc method [PDF]

Fracture and Structural Integrity, 2014
Nowadays, many components and structures are subjected to fatigue loading with a number of cycles higher than 107. In this scientific work, the behaviour of two kinds of tool steel was investigated in very high cycle fatigue regime.
V. Crupi, G. Epasto, E. Guglielmino, G. Risitano   +3 more
doaj   +2 more sources

A Modified Fatigue Damage Model for High-Cycle Fatigue Life Prediction

Advances in Materials Science and Engineering, 2016
Based on the assumption of quasibrittle failure under high-cycle fatigue for the metal material, the damage constitutive equation and the modified damage evolution equation are obtained with continuum damage mechanics.
Meng Wang, Qingguo Fei, Peiwei Zhang
doaj   +1 more source

High cycle torsional fatigue properties of 17-4PH stainless steel [PDF]

Fracture and Structural Integrity, 2016
Sensitivity to small defects under torsional fatigue loading condition is examined in the high cycle fatigue regime. Fatigue crack initiation and small crack growth behaviors were observed during fatigue testing and fractographic investigations were ...
K. Yanase, B.M. Shönbauer, M. Endo
doaj   +2 more sources

Comparison between defects and micro-notches in multiaxial fatigue – The size effect and the gradient effect [PDF]

, 2009
Lien vers la version éditeur: http://www.sciencedirect.com/science/article/pii/S0142112308002156This paper attempts to improve the understanding of the multiaxial high cycle fatigue response of micro sized stress concentrations or notches of different ...
MOREL, Franck, NADOT, Yves, MOREL, Anne
core   +1 more source

Gut microbiome and aging—A dynamic interplay of microbes, metabolites, and the immune system

FEBS Letters, EarlyView.
Age‐dependent shifts in microbial communities engender shifts in microbial metabolite profiles. These in turn drive shifts in barrier surface permeability of the gut and brain and induce immune activation. When paired with preexisting age‐related chronic inflammation this increases the risk of neuroinflammation and neurodegenerative diseases.
Aaron Mehl, Eran Blacher
wiley   +1 more source

Study on high-low cycle fretting fatigue life of Inconel718 tenon structure

Hangkong gongcheng jinzhan
The turbine blades of aero-engines are subjected to cyclic high-low cycle loads in actual service environments，which is a typical high-low cycle micro motion fatigue condition. The frequent occurrence of fatigue fracture in turbine blades due to fretting
YANG Xiaolin, MU Qinqin, CHEN Yonghui, YAN Qun   +3 more
doaj   +1 more source

Influence of High Pressure and High Temperature Hydrogen on Fracture Toughness of Ni-Containing Steels and Alloys

Archive of Mechanical Engineering, 2014
W ramach przeprowadzonych badan okreslono wpływ wodoru na krótkotrwała wytrzymałosc i płasko-naprezeniowa ciagliwosc stali 10Cr15Ni27 oraz stopów niklu 04Cr16Ni56, 05Cr19Ni55 przy wielkosciach cisnienia do 35 MPa i zakresie temperatury od 293 do 773 K ...
Balitskii Alexander, Ivaskevich Ljubomyr, Mochulskyi Volodymyr, Eliasz Jacek, Skolozdra Oleg   +4 more
doaj   +1 more source

Multiaxial high-cycle fatigue modelling for random loading [PDF]

MATEC Web of Conferences, 2019
In this paper, a multiaxial fatigue life prediction model is proposed under general multiaxial random loadings. First, a brief review for existing multiaxial fatigue models is given and special focus is on the LiuMahadevan critical plane concept, which ...
Wei Haoyang, Chen Jie, Carrion Patricio, Imanian Anahita, Shamsaei Nima, Iyyer Nagaraja, Liu Yongming   +6 more
doaj   +1 more source

Clustering Algorithm Reveals Dopamine‐Motor Mismatch in Cognitively Preserved Parkinson's Disease

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To explore the relationship between dopaminergic denervation and motor impairment in two de novo Parkinson's disease (PD) cohorts. Methods n = 249 PD patients from Parkinson's Progression Markers Initiative (PPMI) and n = 84 from an external clinical cohort.
Rachele Malito, Chiara Meneghini, Alice Galli, Luca Gallo, Pierfrancesco Mitrotti, Paola Dimartino, Marianna Inglese, Cinzia Zatti, Alessandro Lupini, Andrea Pilotto, Alessandro Padovani, Micol Avenali, Enza Maria Valente, Cristina Tassorelli, Silvia P. Caminiti   +14 more
wiley   +1 more source

Crack initiation mechanisms and life prediction of GH4169 superalloy in the high cycle and very high cycle fatigue regime

Journal of Materials Research and Technology, 2023
In this study, the high cycle and very high cycle fatigue behavior of the GH4169 superalloy was investigated. The results of the fatigue tests demonstrated that failures in the high cycle fatigue regime were initiated from the material surface, whereas ...
Zhi Qin, Bin Li, Chen Chen, Tianyue Chen, Rui Chen, Han Zhang, Hongqian Xue, Changfeng Yao, Liang Tan   +8 more
doaj   +1 more source