Effect of Heat Input Ratio on Residual Stress in Multipass Welding Using Finite Element Method and Ultrasonic Stress Measurement

Shokri, Vahid; Sadeghi, Seyedali; Sadeghi, Mohammad; Javadi, Yashar

doi:10.1007/s10921-015-0301-0

Cited by 6 publications

(3 citation statements)

References 31 publications

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“…The results confirmed the relaxation phenomenon of welding residual stress, and that the stress relaxation of the aluminum welded seam was less than that of the steel counterpart. Javadi [ 21 , 22 , 23 , 24 ] used Lcr waves to measure the overall distribution of welding residual stress in an austenitic stainless steel member using friction stir welding. Experimental results were verified by the hole-drilling method and theoretical analysis.…”

Section: Introductionmentioning

confidence: 99%

Internal Stress Monitoring of In-Service Structural Steel Members with Ultrasonic Method

Teng

et al. 2016

Materials

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Internal stress in structural steel members is an important parameter for steel structures in their design, construction, and service stages. However, it is hard to measure via traditional approaches. Among the existing non-destructive testing (NDT) methods, the ultrasonic method has received the most research attention. Longitudinal critically refracted (Lcr) waves, which propagate parallel to the surface of the material within an effective depth, have shown great potential as an effective stress measurement approach. This paper presents a systematic non-destructive evaluation method to determine the internal stress in in-service structural steel members using Lcr waves. Based on theory of acoustoelasticity, a stress evaluation formula is derived. Factor of stress to acoustic time difference is used to describe the relationship between stress and measurable acoustic results. A testing facility is developed and used to demonstrate the performance of the proposed method. Two steel members are measured by using the proposed method and the traditional strain gauge method for verification. Parametric studies are performed on three steel members and the aluminum plate to investigate the factors that influence the testing results. The results show that the proposed method is effective and accurate for determining stress in in-service structural steel members.

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Section: Introductionmentioning

confidence: 99%

Internal Stress Monitoring of In-Service Structural Steel Members with Ultrasonic Method

Teng

et al. 2016

Materials

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“…As an important branch of power ultrasound, ultrasonic welding was first applied in the fields of electronic packaging and welding of metal structural parts. Since the 1970s, it has been gradually applied to the welding of plastic structural components [1][2][3][4]. Compared with traditional arc welding, ultrasonic welding of plastic structural components has such advantages as fast welding speed, high weld strength, small surface damages, simple equipment operation and cleanness and no pollution, etc., thus having a good application prospect [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Heat Source Analysis on Ultrasonic Welding of Plastic Structural Components Based on Numerical Simulation

Zhang¹

2021

IJHT

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Compared with traditional arc welding, ultrasonic welding of plastic structural components has such advantages as fast welding speed, high weld strength, small surface damages, simple equipment operation and cleanness and no pollution, thus having a good application prospect. However, the existing literatures have discussed little on the thermal stability analysis of the welding process and the influences of the parameters affecting the fixation effect of welding on the heat transfer performance of the welding process. For this reason, this paper analyzes the heat source in the ultrasonic welding of plastic structural components based on numerical simulation. First, numerical simulation was performed on the temperature field of the heat source in the ultrasonic welding of plastic structural components, the basic heat transfer forms in the welding process were elaborated in detail, the corresponding governing equations and boundary conditions were given and the governing equation of nonlinear transient heat conduction were solved by the finite element method. Then, ABAQUS thermal analysis and heat source parameter calibration were carried out on the welding heat source. In the experiment section, the heat source analysis results were given regarding the ultrasonic welding of plastic structural components.

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“…30 Y Javadi et al 31 combined the Lcr wave and finite-element (FE) analysis to investigate the effects of clamping and post-weld heat-treatment on welding residual stress and deformation. 32,33 The combination of FE analysis and the Lcr wave, that is, the FELCR method, 34 is an innovative work to evaluate the residual stress distribution through thickness of the objects, which is an improvement of the traditional Lcr wave method. The implementation of the FELCR wave method provides a reference for the absolute stress evaluation in steel members.…”

Section: Introductionmentioning

confidence: 99%

Cross-correlation-based algorithm for absolute stress evaluation in steel members using the longitudinal critically refracted wave

Teng

et al. 2018

International Journal of Distributed Sensor Networks

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The absolute stress in the in-service steel members is a critical indicator employed for the evaluation of structural performance. In the field of structural health monitoring, the stress is usually monitored by the stress monitoring system. However, the monitored stress is the relative value, rather than the absolute value. The longitudinal critically refracted wave has shown potential for use in absolute stress measurement. The accurate measurement of the longitudinal critically refracted wave time-of-flight is the core issue with this method. In this study, a cross-correlation-based algorithm is presented for stress evaluation using the longitudinal critically refracted wave. Specifically, a cross-correlation theoretical formula is derived and a five-step framework is proposed for the longitudinal critically refracted wave time-of-flight measurement. Four steel members are employed to investigate the parametric calibration using the longitudinal critically refracted wave to measure the stress. On this basis, the proposed cross-correlation-based algorithm is used to evaluate the stress of a steel member. The results indicate that the cross-correlation-based algorithm can measure the longitudinal critically refracted wave time-of-flight without filtering the noise signal, and the stress measurement results are better than those of the traditional peak value method. The proposed method provides a potential way to measure the absolute stress in practical engineering applications.

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Effect of Heat Input Ratio on Residual Stress in Multipass Welding Using Finite Element Method and Ultrasonic Stress Measurement

Cited by 6 publications

References 31 publications

Internal Stress Monitoring of In-Service Structural Steel Members with Ultrasonic Method

Internal Stress Monitoring of In-Service Structural Steel Members with Ultrasonic Method

Heat Source Analysis on Ultrasonic Welding of Plastic Structural Components Based on Numerical Simulation

Cross-correlation-based algorithm for absolute stress evaluation in steel members using the longitudinal critically refracted wave

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