Results 171 to 180 of about 6,620 (226)

Expert recommendations for setting and adjusting airway pressure release ventilation based on clinical experience and basic science evidence. [PDF]

Front Med (Lausanne)
Nieman GF, Bates JHT, Andrews PL, Rose L, Shiber J, Araos J, Aurelien L, Madden M, Manougian T, Satalin J, Varpula T, Al-Khalisy H, Markandaya M, Silva PL, da Fonseca Reis LF, Downs J, Camporota L, Habashi NM.   +17 more
europepmc   +1 more source

Vertex models capturing subcellular scales in epithelial tissues. [PDF]

PLoS Comput Biol
Lange Z, Matthäus F, Qiu M.
europepmc   +1 more source

Grand Challenges and Opportunities in Stimulated Dynamic and Resonant Catalysis. [PDF]

ACS Catal
Monai M, Albrecht W, Alkemper A, Artrith N, Baldi A, Beck A, Berry RT, Bianco E, Brzesowsky FA, Dong Q, Faria Albanese JA, Frontiera RR, Galvin E, Garnett EC, Gerrits N, Grzelczak M, Herzog M, Hess F, Kolganov AA, Koopman W, Kosinov N, Lander S, Lepre E, Maaskant DN, Miao G, Naik AM, Onn TM, Peterson AA, Piankova D, Pidko EA, Trangwachirachai K, van den Bosch F, Xu D, Yilmaz B, Zeininger J, Alarcón Lladó E, Meyer J, Dauenhauer PJ, Askes SHC.   +38 more
europepmc   +1 more source

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Development of a new ratcheting fatigue life prediction model of a nickel-based superalloy based on ratcheting strain rate

Materials Letters, 2022
Abstract The stress-controlled low cycle fatigue and ratcheting fatigue behaviors of a nickel-based superalloy were proposed under a series of symmetric and asymmetric cyclic loadings at 650 °C to explore the effects of stress amplitude and mean stress on fatigue life.
Wei Wen Kong, Chao Yuan
exaly   +2 more sources

Ratcheting strain in interstitial free steel

Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing, 2013
Abstract This investigation illustrates ratcheting phenomenon, in-situ substructural variations during ratcheting and post-ratcheting tensile properties of interstitial free steel at ambient temperature (≈300 K). The results highlight that the nature of strain accumulation is dependent on the magnitude of the employed combinations of mean stress (σm)
Krishna Dutta
exaly   +2 more sources

Effect of mean stress and ratcheting strain on fatigue life of steel

International Journal of Fatigue, 1996
Detailed results of stress-controlled fatigue tests with tensile mean stress on ASTM A-516 Gr. 70 steel are presented. By using different preloading procedures, the ratcheting effect on the fatigue life of materials was separated from the mean stress effect. A previously proposed energy-based life prediction criterion is extended to include the effects
exaly   +2 more sources

Triphasic ratcheting strain prediction of materials over stress cycles

Fatigue and Fracture of Engineering Materials and Structures, 2012
ABSTRACTThis study intends to formulate ratcheting strain evolution in steel alloys of 42CrMo, 20CS, SA333 Gr. 6 C‐Mn and OFHC copper over uniaxial stress cycles. Stages of ratcheting deformation were related to stress cycles, lifespan, mechanical properties and amplitude and mean stress components by means of linear and nonlinear functions.
G R Ahmadzadeh, A Varvani
exaly   +2 more sources

Uniaxial strain ratcheting behavior of dented steel tubular: An experimental study

Engineering Failure Analysis, 2014
Abstract Changes in the internal pressure and the temperature in a steel pipeline generates cycles of high axial compression/relaxing in the line. This makes the line vulnerable to cyclic creep and progressive plastic straining (ratcheting). On the other hand, offshore pipelines are usually laid unburied, so they might become disposed to heavy ...
M Zeinoddini
exaly   +2 more sources

Ratcheting strain and simulation of 16MnR steel under uniaxial cyclic loading

Computational Materials Science, 2012
Abstract 16MnR steel is widely used in pressure vessel in China and its ratcheting and fatigue behavior have attracted numerous interest during the past years. In this study, a series of experiments were performed on the uniaxial ratcheting deformation of 16MnR steel.
Gang Chen, Xu Chen
exaly   +2 more sources

Ratchetting strain prediction

International Journal of Pressure Vessels and Piping, 2007
A time-efficient method for predicting ratchetting strain is proposed. The ratchetting strain at any cycle is determined by finding the ratchetting rate at only a few cycles. This determination is done by first defining the trajectory of the origin of stress in the deviatoric stress space and then incorporating this moving origin into a cyclic ...
Mohammad Noban, Hamid Jahed
openaire   +1 more source