Numerical investigation of through crack behaviour under welding residual stresses

Labeas, G.; Diamantakos, Ioannis

doi:10.1016/j.engfracmech.2009.03.006

Cited by 25 publications

(17 citation statements)

References 14 publications

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“…Consequently, there is an increasing interest in prediction methodologies that also consider the influence of the welding-induced residual stresses. As the presence of residual stresses directly influences the observed stress intensity at the crack tip during cyclic loading, the general methodology to perform such predictions is well accepted [5][6][7][8][9][10][11][12][13][14][15][16][17] and consists of the following steps:…”

Section: Introductionmentioning

confidence: 99%

The influence of crack face contact on the prediction of fatigue crack propagation in residual stress fields

Schnubel

Huber

2012

Engineering Fracture Mechanics

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It is a common practise to predict fatigue crack propagation rates for specimens containing residual stresses using the weight function or finite element method. Due to combined applied load and internal residual stresses, the stress intensity factor K tot at the crack tip is calculated and used to predict the resulting fatigue crack propagation rates in conjunction with empirical crack growth laws. The calculation of K tot normally implies pure linear elastic behaviour and the validity of the superposition law. For cracks growing through areas of high compressive residual stresses and subsequent transition areas from compressive to tensile residual stresses, this assumption is not necessarily valid. In this case the definition of non-linear contact conditions on the crack faces becomes necessary to describe the problem in a physically sound way. The presented study discusses the resulting differences in the prediction results for the case of an aluminium C(T)100 specimen containing a residual stress pattern typically found after welding processes.

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Section: Introductionmentioning

confidence: 99%

The influence of crack face contact on the prediction of fatigue crack propagation in residual stress fields

Schnubel

Huber

2012

Engineering Fracture Mechanics

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“…Despite the reduced hardness of this part, the decrease falls within a small range. It can alleviate poor toughness and easy cracking induced by high hardness [33,34]. Overall analysis indicates that Rockwell hardness increases with an increase in carbon content and in the presence of Mo and V. One reason is that as carbon content increases, the dissolved carbon content increases, and the amount of carbides increases in the surfacing layer (Figure 5a,b); both of them can increase the hardness of surfacing layer.…”

Section: Comprehensive Hardnessmentioning

confidence: 98%

“…Despite the reduced hardness of this part, the decrease falls within a small range. It can alleviate poor toughness and easy cracking induced by high hardness [33,34].…”

Section: Comprehensive Hardnessmentioning

confidence: 99%

Effect of Carbon Content and Elements Mo and V on the Microstructure and Properties of Stainless Steel Powder Surfacing Layer

Wei

Han

et al. 2020

Coatings

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This study evaluated the effect of an increase in carbon content and the presence of the elements Mo and V on the microstructure and properties of the surfacing layer of stainless steel powder for knives and scissors production. Various types of high-quality stainless steel powder (5Cr 13 , 8Cr 13 , and 8Cr 13 MoV) were deposited on the surface of low-grade stainless steel used to produce knives and scissors (2Cr 13 ). The microstructure, comprehensive hardness, wear resistance, impact toughness, and corrosion resistance of the stainless steel powder surfacing layers were tested and analyzed. Results indicate that the increase in carbon content and the presence of Mo and V improve the comprehensive hardness and wear resistance of the stainless steel powder surfacing layer, and both exert the superposition effect. However, the increase in carbon content and the presence of Mo and V slightly influence the impact toughness of the surfacing layer. In addition, the increase in carbon content significantly reduces the corrosion resistance of the surfacing layer. This adverse effect is reduced when Mo and V exist. Other advantages of the presence of Mo and V in the stainless steel powder surfacing layer include the refinement of grain size, reduction of carbide particle size, and improvement of the metallurgical bonding of the surfacing layer and the matrix.Coatings 2020, 10, 371 2 of 16 barber tools, which are seldom used in daily life. Therefore, to manufacture high-quality knives and scissors that can be used by the general public, this study explores a method to produce such instruments by plasma surfacing. The surfacing layer obtained by plasma surfacing can achieve large thickness [20,21]. This characteristic is used for surfacing powders of high-grade materials for knife and scissors production on the surface of massive low-grade materials for knife and scissors production. The composite material is then longitudinally cut. The thicker surfacing layer is directly used to produce the edge of knives and scissors, while the matrix (low-grade materials) is used to produce the body of knives and scissors. The method belongs to local strengthening of knives and scissors. The advantage of this method is that only the edge of a knife or scissors is mainly forced and abraded during use [22][23][24]; most high-grade materials are in an idle state of inaction. Limiting the use of high-grade materials to the production of the edge of a knife or scissors can not only meet the requirements for knife and scissors production but also reduce waste (of high-quality materials) and limit costs. However, no studies have been reported on surfacing high-quality stainless steel powder for knife and scissors production, and no methods have been developed to evaluate the microstructure and properties of the surfacing layer of high-quality stainless steel powder for such production.This study mainly aims to explore the microstructure and properties of the surfacing layer of high-quality stainless steel powder for knife and scissors product...

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“…He proposed a residual stress distribution to represent a butt weld between two plates and then developed a method to evaluate the stress intensity factor assuming elastic behaviour. Chell and Ewing [2] discussed the effect of plasticity on fracture when residual stresses exist while Labeas and Diamantakos [3] used finite element analysis to explore the stress intensity factor for a crack of varying length embedded in a residual stress field.…”

Section: Introductionmentioning

confidence: 99%

Elastic and Elastic-Plastic Behaviour of a Crack in a Residual Stress Field

Aird

Pavier

2016

Residual Stresses 2016

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Abstract. The behaviour of a crack in the centre of a plate subject to a far-field stress has been studied where the plate contains an initial residual stress. Elastic and elastic-plastic conditions have been considered. For elastic conditions a series of analyses based on stress intensity factor solutions have been developed to calculate the state of opening and the stress intensity factor for cracks of different lengths relative to the size of the residual stress field and different magnitudes of applied stress relative to the magnitude of the residual stress. For elastic-plastic conditions a strip yield model has been used to develop a similar set of analyses. The results of these analyses compare closely with those of finite element modelling. IntroductionIn an engineering component containing a crack, residual stresses interact with stresses generated by applied loading in a complex manner. Typically, numerical techniques are required to predict the likelihood of fracture, providing results that are particular to the set of conditions considered. The work we describe here represents an attempt to understand the generic behaviour of the crack for a straightforward geometry, loading and residual stress distribution that we hope will provide insight into the results of more involved analyses.Terada [1] provided an early analysis of the effect of residual stress on a crack. He proposed a residual stress distribution to represent a butt weld between two plates and then developed a method to evaluate the stress intensity factor assuming elastic behaviour. Chell and Ewing [2] discussed the effect of plasticity on fracture when residual stresses exist while Labeas and Diamantakos [3] used finite element analysis to explore the stress intensity factor for a crack of varying length embedded in a residual stress field.In this paper we investigate the behaviour of a crack in an infinite two dimensional plate with an initial residual stress distribution under superimposed uniaxial tension. First we describe our method for generating a residual stress distribution using a stress function. Next we use existing stress intensity solutions to explore the linear elastic behaviour of the crack as the length of the crack is altered and the magnitude of the applied stress is increased. We then use the strip yield model to investigate the elastic-plastic behaviour of the crack with increasing applied stress, for one size of the crack.

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Numerical investigation of through crack behaviour under welding residual stresses

Cited by 25 publications

References 14 publications

The influence of crack face contact on the prediction of fatigue crack propagation in residual stress fields

The influence of crack face contact on the prediction of fatigue crack propagation in residual stress fields

Effect of Carbon Content and Elements Mo and V on the Microstructure and Properties of Stainless Steel Powder Surfacing Layer

Elastic and Elastic-Plastic Behaviour of a Crack in a Residual Stress Field

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