An inelastic stress-strain law for elevated temperature and slowly time varying loads

1972 ◽  
Vol 8 (4) ◽  
Author(s):  
Erhard Krempl
Keyword(s):  
Elevated Temperature ◽  
Time Varying ◽  
Stress Strain

scholarly journals Residual stress-strain relationship for the biochar-based mortar after exposure to elevated temperature

2021 ◽  
pp. e00540
Author(s):  
Satheeskumar Navaratnam ◽  
Hendrik Wijaya ◽  
Pathmanathan Rajeev ◽  
Priyan Mendis ◽  
Kate Nguyen
Keyword(s):  
Residual Stress ◽  
Elevated Temperature ◽  
Stress Strain ◽  
Strain Relationship

Development of the External Pressure Charts for 2¼Cr-1Mo and Mod.9Cr-1Mo Steel at Elevated Temperature Design

2019 ◽  
Author(s):  
Masanori Ando ◽  
Satoshi Okajima ◽  
Kazumichi Imo
Keyword(s):  
Elevated Temperature ◽  
Fast Reactor ◽  
Strain Curve ◽  
External Pressure ◽  
Stress Strain ◽  
Part D ◽  
Elevated Temperature Design ◽  
Minimum Stress ◽  
Design Yield ◽  
Strain Equation

Abstract For the required thickness estimation against buckling in the elevated temperature design, the external pressure chart for two kinds of ferritic steel, 2 1/4Cr-1Mo and Mod.9Cr-1Mo steel, was developed. On the basis of the guideline described in the ASME BPVC Section II, Part D, Mandatory Appendix 3 with mechanical and physical properties provided in the JSME fast reactor code, the external pressure charts for each material were constructed. The minimum stress-strain curve for evaluating the external pressure chart was applied the stress-strain equation with design yield strength, Sy, provided by the JSME fast reactor code. As a result, three external pressure charts with digital values were proposed for elevated temperature design. Moreover, the rationalization effect from the current alternative was evaluated by the sample problem. This proposal resolves two issues. One is alternative use of chart for lower strength material over the 150 °C. The other is the external pressure chart above 480°C for which ferritic steels are not available.

scholarly journals Application of the Non-Contact Video Gauge on the Mechanical Properties Test for Steel Cable at Elevated Temperature

2019 ◽  
Vol 9 (8) ◽  
pp. 1670 ◽  
Author(s):  
Yong Du ◽  
Zhang-ming Gou
Keyword(s):  
Mechanical Properties ◽  
Elevated Temperature ◽  
Ambient Temperature ◽  
Strain Gauge ◽  
Complex Shape ◽  
Full Range ◽  
Steel Cable ◽  
Stress Strain ◽  
Strain Stress ◽  
Steel Cables

As the limit of traditional contact measurement, it is difficult to precisely measure the steel cables twisted by a branch of wires especially at elevated temperature. In this paper the strain-stress relationships of S355 and S690 structural steel, 1860 MPa steel cable twisted by seven wires have been measured by the strain gauge, extensometer and non-contact video gauge at ambient temperature and elevated temperature, respectively. Comparison of the stress-strain curves gotten by different measuring technology, it indicates that the non-contact video gauge can provide a more efficient and reliable database than the strain gauge as well as extensometer, especially at an elevated temperature. It is worth noting that the non-contact video gauge can capture not only the full range of stress-strain curves of steel cables, but is also efficient for the specimens with a complex shape.

Study on Elevated Temperature Impact Properties of 20MnSiV Steel

2012 ◽  
Vol 602-604 ◽  
pp. 313-317
Author(s):  
Da Yong You ◽  
Yin Lan Bai
Keyword(s):  
Elevated Temperature ◽  
Test Temperature ◽  
Fracture Mechanism ◽  
Room Temperature ◽  
Strain Softening ◽  
Practical Significance ◽  
Stress Strain ◽  
Strain Fracture ◽  
Temperature Impact ◽  
Longitudinal Extension

The test of 20MnSiV Ⅲ grade reinforced bar is carried out at room temperature and other nine temperatures: 100°C、200°C、300°C、400°C、500°C、600°C、700°C、800°C、900°C.The results show that, the highest impact absorbing energy 137J appeared when the test temperature is 200°C, while the lowest is 75.5J when the temperature is 600°C. While the test temperature is over 700°C and the sample is near damaged, strain softening and serious longitudinal extension is happened in the course of impact, and the gap of the sample can not result in the concentration of stress-strain, fracture mechanism of the material is changed, and then impact absorbing energy had no practical significance.

Elevated temperature cyclic stress-strain behaviour in nickel based superalloys

2002 ◽  
Vol 19 (4) ◽  
pp. 187-192 ◽  
Author(s):  
I.M. Wilcock ◽  
D.G. Cole ◽  
J.W. Brooks ◽  
M.B. Henderson
Keyword(s):  
Elevated Temperature ◽  
Cyclic Stress ◽  
Stress Strain ◽  
Strain Behaviour

Numerical Simulation of the Four-Roll Bending Process for 2.25Cr-1Mo-0.25V Thick-Plate at Elevated Temperature

2017 ◽  
Author(s):  
Yafei Wang ◽  
Guangxu Cheng ◽  
Zaoxiao Zhang ◽  
Yun Li ◽  
Jianxiao Zhang
Keyword(s):  
Numerical Simulation ◽  
Elevated Temperature ◽  
Plate Thickness ◽  
Strain Curve ◽  
High Temperature Deformation ◽  
Temperature Deformation ◽  
Plate Bending ◽  
Stress Strain ◽  
Explicit Finite Element ◽  
Bending Process

In this paper, the four-roll plate bending process of 2.25Cr-1Mo-0.25V steel at elevated temperature is investigated by numerical simulation. This 3-D simulation is finished by using the elastic-plastic dynamic explicit finite element method (FEM) under the ANSYS/LS-DYNA environment. The strain softening behavior of 2.25Cr-1Mo-0.25V steel at elevated temperature is presented and discussed. The stress-strain relationship of the steel plate is modeled using a piecewise linear material model, with the stress-strain curve obtained through tensile tests. The plate bending process with a plate thickness of 150 mm is investigated. The amount and position of maximum plastic deformation are analyzed. The present study provides an important basis for the optimization of bending parameters and further investigation of the effect of high-temperature deformation on the resistance to hydrogen attack of 2.25Cr-1Mo-0.25V steel.

Sign in / Sign up

Export Citation Format

Share Document