Experimental Study on the Mechanical Behavior of EN08 Steel at Different Temperatures and Strain Rates

Abed, Farid; Abdul–Latif, A.; Yehia, Ayatollah

doi:10.3390/met8090736

Cited by 9 publications

(6 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Predicted stress-strain curve for linearly decreasing strain-rate (a-. ε-LIN) is similar to measured true stress-true strain profile of drop-weight experiments in Reference [27] (although they are carried out at room temperature and two decades of higher strain rates) on one hand, and similar to industrial hydraulic or screw type presses. Experiment developed for testing of sheet specimens by progressive decrease of strain rates yields more pronounced decrease of force after reaching peak force [28], which is similar to the stress-strain response on the square root law shape of the strain-rate input (b-.…”

Section: Stress Prediction For Non-constant Strain Ratessupporting

confidence: 74%

Description of Hot Compressive Stress-Strain Curves Using Transfer Functions

Vode

Malej

Arh

et al. 2019

Metals

View full text Add to dashboard Cite

Mathematical descriptions of true stress/true strain curves, experimentally obtained on cylindrical specimens under hot compressive conditions, are of great importance and are widely investigated. An additional black-box modelling approach using transfer functions (TF) is tested. For tested 51CrV4 steel, a TF of third order is employed for description of true stress (output) depending on the strain rate (input). Sets of TF coefficients are determined using numerical optimization techniques for each testing temperature and strain rate. To avoid scattering of TF parameters, time in Laplacian transformation is replaced with strain, while TF input is the strain rate. Obtained models cover deformations starting practically from zero to 0.7. Average absolute relative error for models based on TF of the third order and of the second order are 0.93% and 3.64%.

show abstract

Section: Stress Prediction For Non-constant Strain Ratessupporting

confidence: 74%

Description of Hot Compressive Stress-Strain Curves Using Transfer Functions

Vode

Malej

Arh

et al. 2019

Metals

View full text Add to dashboard Cite

show abstract

“…Experimental investigations of the behaviour of EN08 steel and corrosion-resistant alloy steel (MMFX) reinforcing bars were conducted by Abed et al (2018Abed et al ( , 2020 to study their performance at elevated temperatures. For the EN08 steel, strain increase rate and temperature significantly affected its yield and ultimate strengths.…”

Section: Residual Compressive Strength Of Rc Columnsmentioning

confidence: 99%

Parametric study on the residual compressive strength of RC columns subjected to different standard fire durations and load ratios

Mirzabagheri

Salem

2022

JSFE

View full text Add to dashboard Cite

PurposeSince columns are critical structural elements, they shall withstand hazards without any considerable damage. In the case of a fire, although concrete has low thermal conductivity compared to other construction materials, its properties are changed at elevated temperatures. Most critically, the residual compressive strengths of reinforced concrete columns are significantly reduced after fire exposure. Validation of the worthiness of rehabilitating concrete structures after fire exposure is highly dependent on accurately determining the residual strengths of fire-damaged essential structural elements such as columns.Design/methodology/approachIn this study, eight reinforced-concrete columns (200 × 200 × 1,500 mm) that were experimentally examined in a prior related study have been numerically modelled using ABAQUS software to investigate their residual compressive strengths after exposure to different durations of standard fire (i.e. one and two hours) while subjected to different applied load ratios (i.e. 20 and 40% of the compressive resistance of the column). Outcomes of the numerical simulations were verified against the prior study's experimental results.FindingsIn a subsequent phase, the results of a parametric study that has been completed as part of the current study to investigate the effects of the applied load ratios show that the application of axial load up to 80% of the compressive resistance of the column did not considerably influence the residual compressive strength of the shorter columns (i.e. 1,500 and 2,000-mm high). However, increasing the height of the column to 2,500 or 3,000 mm considerably reduced the residual compressive strength when the load ratio applied on the columns exceeded 60 and 40%, respectively. Also, when the different columns were simulated under two-hour standard fire exposure, the dominant failure was buckling rather than concrete crushing which was the typical failure mode in most columns.Originality/valueThe outcomes of the numerical study presented in this paper reflect the residual compressive strength of RC columns subjected to various applied load ratios and standard fire durations. Also, the parametric study conducted as part of this research on the effects of higher load ratios and greater column heights on the residual compressive strength of the fire-damaged columns is practical and efficient. The developed computer models can be beneficial to assist engineers in assessing the validity of rehabilitating concrete structures after being exposed to fire.

show abstract

“…Then, an energy-based empirical model was used to predict the damage evolution of the 5083 Aluminum alloy at various strain rates. Abed et al [53] performed a mechanical study on EN08 steel at quasi-static and dynamic strain rates. They quantified the micro defects density by scanning electron microscope (SEM) images and proposed it as an input for the energy-based model to predict the material's damage evolution.…”

Section: Other Empirical Models For Metalsmentioning

confidence: 99%

A Review of Damage, Void Evolution, and Fatigue Life Prediction Models

Lee

Basaran

2021

Metals

View full text Add to dashboard Cite

Degradation, damage evolution, and fatigue models in the literature for various engineering materials, mostly metals and composites, are reviewed. For empirical models established under the framework of Newtonian mechanics, Gurson–Tvergaard–Needleman (GTN) type model, Johnson-Cook (J-C) type damage model, microplasticity model, some other micro-mechanism based damage models, and models using irreversible entropy as a metric with an empirical evolution function are thoroughly discussed. For Physics-based models, the development and applications of unified mechanics theory is reviewed.

show abstract

Experimental Study on the Mechanical Behavior of EN08 Steel at Different Temperatures and Strain Rates

Cited by 9 publications

References 34 publications

Description of Hot Compressive Stress-Strain Curves Using Transfer Functions

Description of Hot Compressive Stress-Strain Curves Using Transfer Functions

Parametric study on the residual compressive strength of RC columns subjected to different standard fire durations and load ratios

A Review of Damage, Void Evolution, and Fatigue Life Prediction Models

Contact Info

Product

Resources

About