scholarly journals The Role of Overloading on the Reduction of Residual Stress by Cyclic Loading in Cold-Drawn Prestressing Steel Wires

2017 ◽  
Vol 7 (1) ◽  
pp. 84 ◽  
Author(s):  
Jesús Toribio ◽  
Miguel Lorenzo ◽  
Diego Vergara ◽  
Leticia Aguado
Keyword(s):  
Residual Stress ◽  
Cyclic Loading ◽  
Prestressing Steel ◽  
Steel Wires

scholarly journals The Role of Residual Stresses in the Performance and Durability of Prestressing Steel Wires

2012 ◽  
Vol 52 (7) ◽  
pp. 881-893 ◽  
Author(s):  
J. M. Atienza ◽  
J. Ruiz-Hervias ◽  
M. Elices
Keyword(s):  
Residual Stresses ◽  
Prestressing Steel ◽  
Steel Wires

scholarly journals Influence of Residual Stress Field on the Fatigue Crack Propagation in Prestressing Steel Wires

Materials ◽  
2015 ◽  
Vol 8 (11) ◽  
pp. 7589-7597 ◽  
Author(s):  
Jesús Toribio ◽  
Juan-Carlos Matos ◽  
Beatriz González ◽  
José Escuadra
Keyword(s):  
Residual Stress ◽  
Fatigue Crack ◽  
Stress Field ◽  
Crack Propagation ◽  
Fatigue Crack Propagation ◽  
Residual Stress Field ◽  
Prestressing Steel ◽  
Steel Wires

On the Role of Double Die Angle on the Hydrogen Embrittlement of Cold Drawn Prestressing Steel Wires

2015 ◽  
Vol 665 ◽  
pp. 245-248
Author(s):  
Jesús Toribio ◽  
Miguel Lorenzo ◽  
Diego Vergara
Keyword(s):  
Residual Stress ◽  
Hydrogen Embrittlement ◽  
Plastic Strain ◽  
Strain State ◽  
Cold Drawing ◽  
Stress Generation ◽  
Prestressing Steel ◽  
Residual Stress State ◽  
Drawing Die ◽  
Steel Wires

Residual stresses produced by cold drawing are an undesirable effect of the non-uniform plastic strain distribution generated during the conforming process used for obtaining prestressing steel wires. Among the diverse parameters of the process influencing the residual stress generation, one of the most relevant is the geometry of the drawing die and, in particular, the inlet die angle. Wires drawn with die angles as low as possible will exhibit a lower and more homogeneous plastic strain state and, therefore, a smaller and more uniform residual stress state. Thus, the hydrogen embrittlement (HE) susceptibility of such wires is also lower, thereby enlarging the life in service of these components. In this paper an innovative design of the drawing die is proposed using two consecutive angles (i.e.,varying die angle) for reducing the residual stress-strain state in the cold drawn wires and, consequently, for improving the resistance to HE of prestressing steel wires.

Influence of Drawing Straining Path on Hydrogen Damage of Prestressing Steel Wires

2011 ◽  
Vol 488-489 ◽  
pp. 775-778 ◽  
Author(s):  
Jesús Toribio ◽  
Miguel Lorenzo ◽  
Diego Vergara
Keyword(s):  
Residual Stress ◽  
Hydrogen Embrittlement ◽  
Plastic Strain ◽  
Strain Distribution ◽  
Cold Drawing ◽  
Stress And Strain ◽  
Prestressing Steel ◽  
Hydrogen Damage ◽  
Steel Wires ◽  
Hydrogen Accumulation

Residual stress and strain states, produced during cold drawing, play a key role in hydrogen embrittlement (HE) of prestressing steel wires, because of hydrogen accumulation in certain places of the material is affected by stress and strains fields. Taking into account that thedrawingstraining path directly affectsbothresidual stress and plastic strain distribution, the aim of the present paper is to clarify the influence of drawing straining path in the residual state and, consequently, its influence on the HE process of prestressing steel wires.

Comparative study of the effective parameters on residual stress relaxation in welded aluminum plates under cyclic loading

2020 ◽  
Vol 21 (5) ◽  
pp. 505
Author(s):  
Yousef Ghaderi Dehkordi ◽  
Ali Pourkamali Anaraki ◽  
Amir Reza Shahani
Keyword(s):  
Residual Stress ◽  
Cyclic Loading ◽  
Stress Relaxation ◽  
Stress Amplitude ◽  
Cyclic Plasticity ◽  
Mean Stress ◽  
Effective Parameters ◽  
Perfect Plasticity ◽  
Residual Stress Relaxation ◽  
Aluminum Plates

The prediction of residual stress relaxation is essential to assess the safety of welded components. This paper aims to study the influence of various effective parameters on residual stress relaxation under cyclic loading. In this regard, a 3D finite element modeling is performed to determine the residual stress in welded aluminum plates. The accuracy of this analysis is verified through experiment. To study the plasticity effect on stress relaxation, two plasticity models are implemented: perfect plasticity and combined isotropic-kinematic hardening. Hence, cyclic plasticity characterization of the material is specified by low cycle fatigue tests. It is found that the perfect plasticity leads to greater stress relaxation. In order to propose an accurate model to compute the residual stress relaxation, the Taguchi L18 array with four 3-level factors and one 6-level is employed. Using statistical analysis, the order of factors based on their effect on stress relaxation is determined as mean stress, stress amplitude, initial residual stress, and number of cycles. In addition, the stress relaxation increases with an increase in mean stress and stress amplitude.

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