The influence of thermal properties and preheating on residual stresses in welding

Armentani, Enrico; Esposito, Roberto; Sepe, Raffaele

doi:10.1504/ijcmsse.2007.014870

Cited by 58 publications

(59 citation statements)

References 17 publications

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“…(2) The regions of peak tensile residual stresses in welded stainless steel sections tend to be narrower than in carbon steel sections, yet the transition regions appear to be much wider. This can be attributed to the lower thermal diffusivity of stainless steel, which can result in slower cooling and hence a wider heat affected zone, slower heat diffusion through the base metal means the weld region remain hot longer, producing wider transition zones [24,25]. (3) Finally, examination of the test data suggests that flange width rather than flange thickness is more influential on the size of the peak tensile residual stress region.…”

Section: Existing Predictive Models For Residual Stressesmentioning

confidence: 99%

Residual stress distributions in welded stainless steel sections

Yuan¹,

Wang²,

Shi³

et al. 2014

Thin-Walled Structures

120

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Section: Existing Predictive Models For Residual Stressesmentioning

confidence: 99%

Residual stress distributions in welded stainless steel sections

Yuan¹,

Wang²,

Shi³

et al. 2014

Thin-Walled Structures

120

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“…The proposed FE model considered both conduction and convection, so that the convention was modeled according to the temperature-dependent heat transfer coefficient [57]. Other authors, including Armentani et al [60] and Sepe et al [61], studied the influence of preheating and post-heating treatments on residual stresses in a single-pass butt joint welded by GMAW using 2-and 3-dimensional FE models. In this case, the thermo-mechanical behavior of the welded joint was calculated using a sequentially-coupled formulation that considered the element birth and death technique.…”

Section: Fe Model Proposedmentioning

confidence: 99%

Residual Stresses with Time-Independent Cyclic Plasticity in Finite Element Analysis of Welded Joints

Lostado-Lorza

Bobadilla

Calvo

et al. 2017

Metals

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Due to the intense concentration of heat in a reduced area when Gas Metal Arc Welding (GMAW) is used to join mechanical components, the regions near the weld bead are subjected to severe thermal cycles. Firstly, the region close to the weld bead that is heated tends to be in compression and, when it cools, tends to be in tension. According to Pilipenko, the material is exposed to elastic compression and, then, reaching the yield limit, undergoes plastic deformation with the appearance of residual stresses followed by elastic-plastic unloading. This could be considered as a strain-stress cycle. This paper applies plastic-strain-range memorization based on time-independent cyclic plasticity theory for butt joints with single V-groove Finite Element (FE) models that were manufactured by GMAW. The theory combines both the isotropic hardening and the nonlinear kinematic hardening rule (Chaboche model) to reproduce the behavior of cyclic plasticity and thus to obtain the residual stresses in welded joint FE models. As a practical example, the proposed theory is validated by three welded joint specimens that were manufactured with different input parameters of speed, voltage, and current. An agreement between the residual stresses obtained by the FE model proposed and those obtained experimentally by the hole drilling method at different depths demonstrates that the proposed theory could be valid for modelling the residual stresses in welded joints when cyclic plasticity is considered over the range of speed, voltage, and current studied.

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“…The efficiency is difficult to estimate due to the dependence on the welding conditions and molten depth, so an assumed value of 0.65 was used in the analysis (Armentani et al, 2007). The geometrical parameters a, b, c f , and c r were adjusted to consider the effect of the weaving motion of the welding electrode in a quasi-steady manner.…”

Section: Heat Input Modelmentioning

confidence: 99%