Residual Stresses Measurement Using an Indentation Made by an Impact Load

Lin, Quan; Chen, Huaining; Chen, Jing; Liang, Yue

doi:10.4028/www.scientific.net/msf.490-491.196

Cited by 10 publications

(4 citation statements)

References 1 publication

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“…The stress field was measured using the impact-indentation stress measurement method, which makes use of the principle of superposition stress fields resulting from the residual stresses and the surface plastic deformation (Lin et al 2005). The strain change, which is so-called overlap strain increment, caused by an indentation was measured with a biaxial strain-gage.…”

Section: Comparison Of Temperature and Stress Distributionmentioning

confidence: 99%

Numerical and Experimental Study on Cutting Access Opening in Ship Structure

Zhou¹,

Han²,

Guo³

et al. 2017

j ship prod des

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Creating an access opening in ship structure through thermal cutting is an important process in ship repair and reconstruction. The flame cutting process typically leads to a non-uniform temperature distribution, generates residual thermal stress and localized plastic deformation. As openings are needed at various locations of ship hulls, it is also necessary to consider the effects of structural constraints in the immediate end of the plate where it is either welded or fixed to the ship frame or bulkhead. These are challenging tasks. This paper presents a study based on thermal elastoplastic analysis. By using the finite element techniques, a steel plate model undergoing flame cutting process to create an opening was studied in details. The numerical model was validated with experimental data. The study identified several key parameters and they are: (a) structural boundary condition, (b) steel plate size, (c) opening location, and (d) opening shape.

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Section: Comparison Of Temperature and Stress Distributionmentioning

confidence: 99%

Numerical and Experimental Study on Cutting Access Opening in Ship Structure

Zhou¹,

Han²,

Guo³

et al. 2017

j ship prod des

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show abstract

“…16 The magnitude, nature (compressive, tensile, uniaxial, biaxial and triaxial) and stresses gradient are important parameters for the integrity of a component and thereforefor selecting the right technique for the residual stresses determination. Availability, cost, time taken and material site accessibility must be kept in mind before selecting the technique.…”

Section: Residual Stresses Measurementmentioning

confidence: 99%

“…Many techniques have been developed to measure residual stresses, such as the blind hole drilling method, 13 X-ray diffraction, 14 neutron diffraction 15 and indentation method. 16 The magnitude, nature (compressive, tensile, uniaxial, biaxial and triaxial) and stresses gradient are important parameters for the integrity of a component and thereforefor selecting the right technique for the residual stresses determination. Availability, cost, time taken and material site accessibility must be kept in mind before selecting the technique.…”

Section: Residual Stresses Measurementmentioning

confidence: 99%

Effects of vibratory weld conditioning on residual stresses and transverse contraction distortions in multipass welding

Xu¹,

Chen²,

Ni³

2006

Science and Technology of Welding and Joining

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For the full welded valve, the last procedure is welding, therefore, it is important to control the residual stresses and distortions in order to ensure spool rotation, valve watertightness, the stress corrosion resistance and non-deformability in active service. In the present study, effects of vibratory weld conditioning (VWC) on the residual stresses and transverse contraction distortions compared with normal welding were studied in submerged arc multipass welding. The results show that VWC can relieve the residual stresses greatly and make the distribution of residual stresses uniform. Moreover, VWC can also reduce transverse contraction distortions greatly. According to the analysis of microstructure and dynamic mechanical properties test, the reasons that VWC reduces the residual stresses and transverse contraction distortions were discussed.

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“…And it obtained the true residual elastic strain corresponding to the residual stress. It recorded strain increment in the elastic region apart from the indentation, and eventually obtained the value of residual stresses [5].…”

Section: Introductionmentioning

confidence: 99%

Study on Joint Residual Stress Induced by Laser Beam Welding of High Strength Automobile Thin Sheet

Yan

Chen²,

Chen³

et al. 2010

AMR

Self Cite

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Despite the advantages of the high energy density, high welding velocity and low deformation, some detrimental residual stresses were still introduced during the laser beam welding (LBW) process. The aim of this work was to study the magnitude and distribution of the residual stress in the LBW seam of the high strength automobile thin sheet. With the feature of applicable to the measurement of the residual stresses in the narrow area, the indentation strain method (ISM) was employed. By appropriate design of the biaxial strain rosette with the small size, the ISM was successfully used to measure the residual stress in the thin sheet LBW seam. Also, the finite element method (FEM) was used to calculate the residual stress. The comparison of the measured residual stresses through the ISM was made with those of the cutting relaxation method (CRM) as well as the FEM results. The ISM results showed that the highest tensile residual stress located at the seam centerline and exceeded to the 60 percent of the yield strength of the base metal.

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Residual Stresses Measurement Using an Indentation Made by an Impact Load

Cited by 10 publications

References 1 publication

Numerical and Experimental Study on Cutting Access Opening in Ship Structure

Numerical and Experimental Study on Cutting Access Opening in Ship Structure

Effects of vibratory weld conditioning on residual stresses and transverse contraction distortions in multipass welding

Study on Joint Residual Stress Induced by Laser Beam Welding of High Strength Automobile Thin Sheet

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