Measurement of the Residual Stresses around a Cold Expanded Hole in an EN8 Steel Plate Using the Contour Method

Zhang, Ying; Fitzpatrick, Michael E.; Edwards, L.

doi:10.4028/www.scientific.net/msf.404-407.527

Cited by 25 publications

(15 citation statements)

References 3 publications

(3 reference statements)

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“…The measured cold expansion stress profile was compared with the result predicted by 3D FE modelling, and the comparison was encouraging although there were certain errors at edges, including hole edges. The latest application of the contour method was a 7075 aluminium alloy hand forging, in which three cuts were performed in orthogonal directions to obtain three directions of the stress tensor [59]. The measured stresses were in good agreement with the FE-predicted outcomes.…”

Section: Contour Methodssupporting

confidence: 56%

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Methods of measuring residual stresses in components

et al. 2012

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Residual stresses occur in many manufactured structures and components. Large number of investigations have been carried out to study this phenomenon and its effect on the mechanical characteristics of these components.Over the years, different methods have been developed to measure residual stress for different types of components in order to obtain reliable assessment. The various specific methods have evolved over several decades and their practical applications have greatly benefited from the development of complementary technologies, notably in material cutting, full-field deformation measurement techniques, numerical methods and computing power. These complementary technologies have stimulated advances not only in measurement accuracy and reliability, but also in range of application; much greater detail in residual stresses measurement is now available. This paper aims to classify the different residual stresses measurement methods and to provide an overview of some of the recent advances in this area to help researchers on selecting their techniques among destructive, semi destructive and non destructive techniques depends on their application and the availabilities of those techniques. For each method scope, physical limitation, advantages and disadvantages are summarized. In the end this paper indicates some promising directions for future developments.

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Section: Contour Methodssupporting

confidence: 56%

“…It offers improvements over conventional relaxation methods of measuring residual stresses [59,60]. The theory of the contour method is based on a variation of Bueckners elastic superposition principle [61].…”

Section: Contour Methodsmentioning

confidence: 99%

Methods of measuring residual stresses in components

et al. 2012

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“…Therefore, cold rolled mild steel material was selected for fabrication of side link as mild steel has high ductility and has yield strength 250 MPa greater than the induced stress. The global deformation of side link was found 0.0025 mm which is within the specified limit (Zhang et al, 2002).…”

Section: Finite Element Analysis Of Designed Variable Hitching Systemmentioning

confidence: 99%

“…Accordingly EN24 material was selected for fabricating the drawbar which has yield strength of 667 MPa greater than the induced equivalent stress. The global deformation of drawbar was found to be 0.0454 mm which is within the specified limit (Zhang et al, 2002). Draft and jerk were carried by the side link of model in which maximum possible draft applied on side link is shown in Fig.…”

Section: Finite Element Analysis Of Designed Variable Hitching Systemmentioning

confidence: 99%

Design and development of a variable hitching system for improving stability of tractor trailer combination

Kumar

Raheman

2015

Engineering in Agriculture, Environment and Food

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a b s t r a c t A variable hitching system was designed using finite element analysis and developed to provide hitching height variable from 0.4 m to 0.75 m with respect to the ground using tractor hydraulics. This system facilitated easy attachment of unbalanced trailer to the tractor irrespective of trailer hitch position. Using this system, the front weight utilization factor of tractor improved on an average by 6.13% and 7.37% by decreasing the hitch height from 0.75 m to 0.4 m while hitching unbalanced trailer uphill on inclined unpaved road of 9 with payloads of 3 ton and 4 ton, respectively. A similar improvement of 7.99% and 9.18% was possible on 12 inclined surface. The slip of tractor on 9 inclined unpaved road was decreased by 4.35% and 5.17% for tractor with 3 ton and 4 ton payloads, respectively by increasing the hitching height from 0.4 m to 0.75 m. A similar decrease of 5.60% and 6.99% was possible on 12 inclined surface. Decreasing skid was also observed while pulling trailer downhill with decreasing hitching height. With the use of variable hitching system, front weight utilization factor, slip/skid could be controlled to improve the stability of tractor trailer combination while travelling on inclined surface.

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“…Among the experimental techniques, Sach's boring out technique was used by Ozdemir et al [13] to measure the 3D residual stress distribution around cold-expanded holes. In a most recent publication, Zhang et al [14] used the innovative contour method described by Prime et al [15] to obtain 2D maps of residual stresses that they compared with those obtained by 3D finite element simulations. The nondestructive X-ray technique is widely used to determine residual stresses around the expanded hole [2,16,17].…”

Section: Introductionmentioning

confidence: 99%

On the Measurement and Prediction of the Out-of-Plane Displacement Surrounding Cold-Expanded Holes

D’Acquisto

Pasta

2010

Exp Mech

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Experimental measurements of the out-of-plane displacement surrounding cold-expanded holes in a 6082-T6 aluminum alloy were made with a 3D optical scanner using the technique of the encoded light-pattern projection in white light. The measured surface profiles have shown the thickness discontinuity along the hole edge due to the effect of the split in the sleeve. An analyticalnumerical solution of the out-of-plane displacement is presented based on existing analytical models. Thus, the results given by the analytical model were then compared with the experimental data and with a finite element (FE) model that simulates the cold-expansion process. The location of the elastic-plastic boundary was estimated as the point at which no change in thickness was observed; a good agreement was found in the comparison of measured, FE and analytical results. The measured surface profiles agreed with those predicted by the FE model and analytical solution. The proposed experimental approach can be used together with FE analysis for predicting the radial and circumferential residual stresses in cold-expanded hole. It is quite versatile and can also be used as quality-control technique in the manufacturing processes of cold-expanded holes.

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Measurement of the Residual Stresses around a Cold Expanded Hole in an EN8 Steel Plate Using the Contour Method

Cited by 25 publications

References 3 publications

Methods of measuring residual stresses in components

Methods of measuring residual stresses in components

Design and development of a variable hitching system for improving stability of tractor trailer combination

On the Measurement and Prediction of the Out-of-Plane Displacement Surrounding Cold-Expanded Holes

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