scholarly journals Transient Effects in Creep of Sanicro 25 Austenitic Steel and Their Modelling

Metals ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 245 ◽  
Author(s):  
Luboš Kloc ◽  
Václav Sklenička ◽  
Petr Dymáček
Keyword(s):  
Finite Element Method ◽  
Creep Behaviour ◽  
Creep Model ◽  
Transient Effects ◽  
The Finite Element Method ◽  
Relaxation Effects ◽  
Stress Changes ◽  
Negative Creep ◽  
Creep And Stress Relaxation ◽  
Is Strain

Transient effects upon stress changes during creep of the new Sanicro 25 steel were investigated experimentally using the helicoid spring specimen technique. The creep behaviour was found to be qualitatively the same as that observed earlier with the creep-resistant 9% Cr ferritic-martensitic P-91 steel, but the transient strains are considerably smaller. Negative creep rate, which is strain running against the applied stress, was observed with any stress decrease. Parameters for the complex creep model were estimated and model results were compared to the creep rates measured experimentally. The model can be used for the finite element method modelling of the creep and stress relaxation effects in the components made from the Sanicro 25 steel.

scholarly journals Исследование механизмов уплотнения нанопорошков скуттерудитов CoSb-=SUB=-3-=/SUB=- в процессе активированного полем спекания

2020 ◽  
Vol 46 (18) ◽  
pp. 45
Author(s):  
А.С. Тукмакова ◽  
Д.Б. Щеглова ◽  
А.П. Новицкий ◽  
А.И. Воронин ◽  
В.В. Ховайло ◽  
...  
Keyword(s):  
Activation Energy ◽  
Finite Element Method ◽  
Material Parameter ◽  
Rate Sensitivity ◽  
Grain Boundary Sliding ◽  
Creep Model ◽  
Creep Process ◽  
Sintering Process ◽  
The Finite Element Method ◽  
Boundary Sliding

The densification parameters have been calculated for CoSb3 nanopowders treated within the field activated sintering. We have obtained the values of creep activation energy, strain rate sensitivity exponent and material parameter that characterize the creep process. It is concluded that densification of CoSb3 is due to the grain boundary sliding based creep. The simulation of the sintering process has been carried out using the finite element method; the change of sample sizes due to densification has been calculated using the creep model. The conformity between simulation and experimental results has been shown.

Dynamic Response Analysis of Double-Column Pier Mudslides

2013 ◽  
Vol 444-445 ◽  
pp. 1434-1439
Author(s):  
Shan Liu ◽  
Rui Li ◽  
Qian Qian Liu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Dynamic Response ◽  
Debris Flow ◽  
Pile Foundation ◽  
Response Analysis ◽  
The Finite Element Method ◽  
Dead Load ◽  
Dynamic Response Analysis ◽  
Stress Changes

In recent years, the cases that bridges under the action of debris flow been damaged have increased year by year. In this paper, the dynamic response of the double-column pier under the action of the debris flow are studied. Using the finite element method, considering the action of the upper structures dead load, the analysis of the changes about the displacement and stress of the pier bottom was conducted, as well as the deformation and stress changes in pile foundation.

Simulation of tuning graphene plasmonic behaviors by ferroelectric domains for self-driven infrared photodetector applications

Nanoscale ◽  
2019 ◽  
Vol 11 (43) ◽  
pp. 20868-20875 ◽  
Author(s):  
Junxiong Guo ◽  
Yu Liu ◽  
Yuan Lin ◽  
Yu Tian ◽  
Jinxing Zhang ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Interfacial Effect ◽  
Infrared Photodetector ◽  
The Finite Element Method ◽  
Ferroelectric Domains ◽  
Element Method

We propose a graphene plasmonic infrared photodetector tuned by ferroelectric domains and investigate the interfacial effect using the finite element method.

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