A predicting method of welding residual stress using source of residual stress.

Ueda, Yukio; Kim, You Chul; Yuan, Min

doi:10.2207/qjjws.6.59

Cited by 37 publications

(35 citation statements)

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“…The development of the field of computational welding mechanics has been described in, for example, [Karlsson 1986;Goldak and Akhlaghi 2005;Lindgren 2001a;2001b;2001c;. Much research has focused on predictions of residual stresses and distortions [Chen and Sheng 1992;Lee et al 2008;Ueda et al 1988;Ueda and Yuan 1993].…”

Section: Simulation-driven Design Of Welded Structuresmentioning

confidence: 99%

Mechanics of materials and structures: a simulation-driven design approach

Karlsson

Pahkamaa

Karlberg

et al. 2011

J. Mech. Mater. Struct.

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Engineering product development has developed considerably over the past decade. In order for industry to keep up with continuously changing requirements, it is necessary to develop new and innovative simulation methods. However, few tools and methods for simulation-driven design have been applied in industrial settings and proven to actually drive the development and selection of the ideal solution. Such tools, based on fundamental equations, are the focus of this paper.In this paper the work is based on two cases of mechanics of materials and structures: welding and rotor dynamical simulations. These two examples of simulation-driven design indicate that a larger design space can be explored and that more possible solutions can be evaluated. Therefore, the approach improves the probability of innovations and finding optimal solutions.A calibrated block dumping approach can be used to increase the efficiency of welding simulations when many simulations are required.

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Section: Simulation-driven Design Of Welded Structuresmentioning

confidence: 99%

Mechanics of materials and structures: a simulation-driven design approach

Karlsson

Pahkamaa

Karlberg

et al. 2011

J. Mech. Mater. Struct.

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“…This heat-input corresponds to Q=900(J/mm) for the instantaneous plane heat source. The thermal elasto-plastic analysis by the finite element method is performed using the temperature dependent physical and mechanical properties of the material shown in reference [10][11][12][13] and assuming that the material is mild steel and the model is in plane stress state. The first analysis is performed on model MO(2L=1200, 2B=1000) in cooperation with thermal conduction analysis.…”

Section: Inherent Strain Distribution In Butt Welded Jointmentioning

confidence: 99%

“…In these papers, the characteristics of the source of residual stress was clarified, a method of determining the source was presented and several measuring methods of threedimensional residual stress in a body were developed using the source as a parameter. Later, a new aspect of the characteristics was discovered, and a prediction method of welding residual stress [10][11][12] has been developed. In this method the source is also used as a parameter.…”

Section: Introductionmentioning

confidence: 99%

The Characteristics of the Source of Welding Residual Stress (Inherent Strain) and its Application to Measurement and Prediction

Ueda

Yuan

1992

Mechanical Effects of Welding

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Welding residual stress in a joint is produced as a result of thermal elasto-plastic behavior during welding. The source of residual stress is incompatible strain, called inherent strain in this report, which is composed of shrinkage strain of the weld metal, plastic strain in the vicinity of welded zone, etc. Based on the characteristics of inherent strain, measurement and prediction of three dimensional residual stress have become possible using the inherent strain as a parameter. Here, the characteristics of inherent strain is described by a simple example and the predicting and measuring methods of welding residual stress are outlined.

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“…As is widely accepted, residual stresses in engineering components are caused by incompatible internal permanent strains, named originally as the inherent strains [2][3] and lately as the eigenstrains [4], induced by any inhomogeneous inelastic deformation, temperature gradients or phase transformations during the manufacturing and processing of components. On the other hand, the theory of inverse methods has been actively developed over the past decades.…”

Section: Introductionmentioning

confidence: 99%

“…In particular, inverse problems in elasticity have gained great attention including that of determining residual stresses based on the concept of eigenstrain which makes use of the information observed from experiments [5][6][7]. With the aid of numerical methods, generally the finite element method (FEM) [3,[5][6][7], the unknown eigenstrain distributions can be retrieved following the mathematical framework of inverse problem with eigenstrain theory to obtain the whole field of residual stresses. In spite of the inelastic origin of eigenstrains, the inherent state of residual stress fields falls really into elastic regime so that the boundary element method (BEM) would be the most efficient numerical means to deal with the residual stress problems [8][9].…”

Section: Introductionmentioning

confidence: 99%

Determination of welding residual stresses by inverse approach with eigenstrain formulations of boundary integral equation

Wang

Qin

2011

J. Phys.: Conf. Ser.

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Abstract. Based on the concept of eigenstrain, a straightforward computational model of the inverse approach is proposed for determining the residual stress field induced by welding using the eigenstrain formulations of boundary integral equations. The eigenstrains are approximately expressed in terms of low-order polynomials in the local area around welded zones. The domain integrals with polynomial eigenstrains are transformed into the boundary integrals to preserve the favourable features of the boundary-only discretization in the process of numerical solutions. The sensitivity matrices in the inverse approach for evaluating the eigenstrain fields are constructed by either the measured deformations (displacements) on the boundary or the measured stresses in the domain after welding over a number of selected measuring points, or by both the measured information. It shows from the numerical examples that the results of residual stresses from deformation measurements are always better than those from stress measurements but they are sensitive to the noises from experiments. The results from stress measurements can be improved by introducing a few deformation measuring points while reducing the number of points for stress measuring to reduce the cost since the measurement of deformation is easier than that of stresses in practice.

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A predicting method of welding residual stress using source of residual stress.

Cited by 37 publications

References 0 publications

Mechanics of materials and structures: a simulation-driven design approach

Mechanics of materials and structures: a simulation-driven design approach

The Characteristics of the Source of Welding Residual Stress (Inherent Strain) and its Application to Measurement and Prediction

Determination of welding residual stresses by inverse approach with eigenstrain formulations of boundary integral equation

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