scholarly journals Fatigue cracking in high-strength cold-drawn pearlitic steel wires for anchorage in rocks

2016 ◽  
Vol 2 ◽  
pp. 2330-2337
Author(s):  
Jesús Toribio ◽  
Beatriz González ◽  
Juan-Carlos Matos
Keyword(s):  
Fatigue Cracking ◽  
High Strength ◽  
Pearlitic Steel ◽  
Steel Wires

scholarly journals Analysis of the Bauschinger Effect in Cold Drawn Pearlitic Steels

Metals ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 114
Author(s):  
Jesús Toribio ◽  
Viktor Kharin ◽  
Francisco-Javier Ayaso ◽  
Miguel Lorenzo ◽  
Beatriz González ◽  
...  
Keyword(s):  
Mechanical Behaviour ◽  
Bauschinger Effect ◽  
High Strength ◽  
Pearlitic Steel ◽  
Internal Stresses ◽  
Compression Load ◽  
Prestressing Steel ◽  
Hardening Rule ◽  
Steel Wires ◽  
Cyclic Tension

Prestressing steel wires usually undergo cyclic loading in service. Therefore, it is of interest to analyse certain features of their mechanical behaviour under this type of loading, such as the Bauschinger effect (BE) or the hardening rule, that fit the real mechanical behaviour appropriately. In this study, different samples of high strength pearlitic steel wires were subjected to cyclic tension-compression load exceeding the material yield strength, thus generating plastic strains. From the experimental results, various parameters were obtained revealing that analysed steels exhibited the so-called Masing type BE. In addition, the variation of the BE characteristics (of the effective and internal stresses) with the applied plastic pre-strain indicated that the studied materials followed a mixed strain hardening rule with the domination of the kinematic component.

Multi-Scale Approach to the Fatigue Crack Propagation in High-Strength Pearlitic Steel Wires

2008 ◽  
Vol 5 (6) ◽  
pp. 101564 ◽  
Author(s):  
J. Toribio ◽  
B. González ◽  
J. C. Matos ◽  
F. J. Ayaso ◽  
Richard Neu ◽  
...  
Keyword(s):  
Fatigue Crack ◽  
Crack Propagation ◽  
Fatigue Crack Propagation ◽  
High Strength ◽  
Pearlitic Steel ◽  
Multi Scale ◽  
Steel Wires

scholarly journals Fracture behaviour of high-strength cold-drawn pearlitic steel wires: The role of non-metallic inclusions

2021 ◽  
Vol 33 ◽  
pp. 1203-1208
Author(s):  
Jesús Toribio ◽  
Francisco-Javier Ayaso ◽  
Beatriz González ◽  
Rocío Rodríguez
Keyword(s):  
Fracture Behaviour ◽  
High Strength ◽  
Pearlitic Steel ◽  
Steel Wires ◽  
Metallic Inclusions

scholarly journals Size Effects of High Strength Steel Wires

Metals ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 240 ◽  
Author(s):  
Kanji Ono
Keyword(s):  
Size Effects ◽  
High Strength ◽  
Pearlitic Steel ◽  
Coefficient Of Determination ◽  
Suspension Bridges ◽  
Long Span ◽  
Steel Wires ◽  
Existing Data ◽  
Design Construction ◽  
Theoretical Developments

This study examines the effects of size on the strength of materials, especially on high strength pearlitic steel wires. These wires play a central role in many long span suspension bridges and their design, construction, and maintenance are important for global public safety. In particular, two relationships have been considered to represent strength variation with respect to length parameters: (i) the strength versus inverse square-root and (ii) inverse length equations. In this study, existing data for the strength of high strength pearlitic steel wires is evaluated for the coefficient of determination (R2 values). It is concluded that the data fits into two equations equally well. Thus, the choice between two groups of theories that predict respective relationships must rely on the merit of theoretical developments and assumptions made.

Manufacturing of High-Strength and High-Ductility Pearlitic Steel Wires Using Noncircular Drawing Sequence

2014 ◽  
Vol 38 (7) ◽  
pp. 743-749
Author(s):  
Hyun Moo Baek ◽  
Sun Kwang Hwang ◽  
Ho Seon Joo ◽  
Yong-Taek Im ◽  
Il-Heon Son ◽  
...  
Keyword(s):  
High Strength ◽  
Pearlitic Steel ◽  
High Ductility ◽  
Steel Wires

Micro- and Macro-Approach to the Fatigue Crack Propagation in High-Strength Pearlitic Steel Wires

2007 ◽  
Vol 348-349 ◽  
pp. 681-684 ◽  
Author(s):  
Jesús Toribio ◽  
B. Gonzáles ◽  
Juan Carlos Matos ◽  
F.J. Ayaso
Keyword(s):  
Fatigue Cracks ◽  
Crack Opening ◽  
High Strength ◽  
Cold Drawing ◽  
Pearlitic Steel ◽  
Fatigue Behaviour ◽  
Eutectoid Steel ◽  
Opening Displacement ◽  
Steel Wires

This paper analyzes how the cold drawing process influences the fatigue behaviour of eutectoid steel, with special emphasis on the role of microstructural changes induced during such a manufacturing process. Fatigue cracks are transcollonial and exhibit a preference for fracturing pearlitic lamellae, with non-uniform crack opening displacement values, micro-discontinuities, branchings, bifurcations and frequent local deflections that create microstructural roughness. The net fatigue surface increases with cold drawing due to the higher angle of crack deflections.

Theoretical study of the prestressing strand's stress by computer modeling methods

2020 ◽  
Vol 76 (11) ◽  
pp. 1139-1148
Author(s):  
A. G. Korchunov ◽  
E. M. Medvedeva ◽  
E. M. Golubchik
Keyword(s):  
Residual Stresses ◽  
High Strength ◽  
Pearlitic Steel ◽  
Internal Stresses ◽  
Steel Microstructure ◽  
Compressive Stresses ◽  
Wide Range ◽  
Prestressing Strands ◽  
Increasing Temperature ◽  
Wire Strand

The modern construction industry widely uses reinforced concrete structures, where high-strength prestressing strands are used. Key parameters determining strength and relaxation resistance are a steel microstructure and internal stresses. The aim of the work was a computer research of a stage-by-stage formation of internal stresses during production of prestressing strands of structure 1х7(1+6), 12.5 mm diameter, 1770 MPa strength grade, made of pearlitic steel, as well as study of various modes of mechanical and thermal treatment (MTT) influence on their distribution. To study the effect of every strand manufacturing operation on internal stresses of its wires, the authors developed three models: stranding and reducing a 7-wire strand; straightening of a laid strand, stranding and MTT of a 7-wire strand. It was shown that absolute values of residual stresses and their distribution in a wire used for strands of a specified structure significantly influence performance properties of strands. The use of MTT makes it possible to control in a wide range a redistribution of residual stresses in steel resulting from drawing and strand laying processes. It was established that during drawing of up to 80% degree, compressive stresses of 1100-1200 MPa degree are generated in the central layers of wire. The residual stresses on the wire surface accounted for 450-500 MPa and were tension in nature. The tension within a range of 70 kN to 82 kN combined with a temperature range of 360-380°С contributes to a two-fold decrease in residual stresses both in the central and surface layers of wire. When increasing temperature up to 400°С and maintaining the tension, it is possible to achieve maximum balance of residual stresses. Stranding stresses, whose high values entail failure of lay length and geometry of the studied strand may be fully eliminated only at tension of 82 kN and temperature of 400°С. Otherwise, stranding stresses result in opening of strands.

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