Time-dependent ratcheting of 35CrMo structural steel at elevated temperature considering stress rates

2016 ◽  
Vol 34 (3) ◽  
pp. 172-178 ◽  
Author(s):  
Wei Wang ◽  
Xiaotao Zheng ◽  
Jiuyang Yu ◽  
Wei Lin ◽  
Chenggang Wang ◽  
...  
Keyword(s):  
Elevated Temperature ◽  
Structural Steel ◽  
Time Dependent

Elevated temperature mechanical properties of solid section structural steel

2017 ◽  
Vol 149 ◽  
pp. 186-201 ◽  
Author(s):  
Martin Neuenschwander ◽  
Markus Knobloch ◽  
Mario Fontana
Keyword(s):  
Mechanical Properties ◽  
Elevated Temperature ◽  
Structural Steel

EFFECT OF ELEVATED TEMPERATURE ON CONCRETE STRUCTURES BY BOUNDARY ELEMENTS

2012 ◽  
Vol 09 (01) ◽  
pp. 1240014 ◽  
Author(s):  
PETR P. PROCHAZKA ◽  
TAT S. LOK
Keyword(s):  
Elevated Temperature ◽  
Boundary Element Method ◽  
Nonlinear System ◽  
Time Dependent ◽  
System Of Equations ◽  
Systems Of Equations ◽  
Strongly Nonlinear ◽  
Strongly Nonlinear System ◽  
Long Time ◽  
Large Systems

Extreme elevation of temperature principally threatens tunnel linings and may cause fatal disaster; the recovery of it may take a long time and significant traffic troubles. System of equations is to be described and solution in terms of boundary element method (BEM) is suggested. Moreover, a technique of time-dependent eigenparameters enables one to apply parallel computations and converts the strongly nonlinear system to pseudo-linear one using the influence and polarization tensors. Consequently, instead of repeated solution of large systems of equations, the multiplication of pre-calculated influence matrices has to be carried out instead. In order to properly create the above-outlined procedure, internal cells are selected in the regions primarily connected by the change of temperature. Some examples follow the theory.

Comparison of the Isochronous Method and a Time-Explicit Model for Creep Analysis

2008 ◽  
Author(s):  
William Koves ◽  
Mingxin Zhao
Keyword(s):  
Elevated Temperature ◽  
Large Scale ◽  
Time Dependent ◽  
Creep Model ◽  
Full Time ◽  
Pure Bending ◽  
Stress Strain ◽  
Creep Analysis ◽  
Generalized Time ◽  
Strain Method

The design of components or structures at elevated temperature is complex. The use of rigorous time dependent material models may not be practical for many large scale industrial problems. The use of simplified methods permits the creep analysis of components that would be impractical by rigorous time dependent models. The Isochronous Stress-Strain method is an approach that has been used extensively for the creep evaluation of elevated temperature components. The method has been used for the analysis of problems containing both primary and secondary stresses. The method has also been used to evaluate creep buckling problems. Although the method has been accepted as an alternative to a full time dependent creep analysis, the limitations and accuracy of the method have not been investigated systematically and are not fully understood. This study compares the isochronous stress-strain method with a generalized time-explicit creep model for materials in high temperature applications. Analytical solutions are developed for three basic loading configurations, including uniaxial tension, pure bending, and torsion in either load or displacement controlled conditions. Deformations, stresses, and creep strains are compared between the two different methods.

Fire-resistant capacity of RC structures considering time-dependent creep strain at elevated temperature

2016 ◽  
Vol 68 (15) ◽  
pp. 782-797 ◽  
Author(s):  
Ju-young Hwang ◽  
Hyo-Gyoung Kwak ◽  
Jinwook Hwang ◽  
Yonghoon Lee ◽  
Wha-Jung Kim
Keyword(s):  
Elevated Temperature ◽  
Creep Strain ◽  
Time Dependent ◽  
Rc Structures
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