Experimental and computational analysis of residual buckling distortion of bead-on-plate welded joint

Wang, Jiangchao; Yin, Xianqing; Murakawa, Hidekazu

doi:10.1016/j.jmatprotec.2013.02.009

Cited by 63 publications

(12 citation statements)

References 10 publications

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“…Strain is a linear function of displacement if a small deformation is assumed. However, Green–Lagrange strain is a nonlinear function of displacement when the deformation is large 31 . In this study, the small deformation theory was suitable because excessive deformation was not permitted when the piston operated, and the stress–strain relationship followed the isotropic Hooke's law for elasticity and Levy‐Mises theory for plasticity.…”

Section: Experimental and Analysis Methodsmentioning

confidence: 99%

Experimental and computational study on thermo‐mechanical fatigue life of aluminium alloy piston

Chen

et al. 2020

Fatigue Fract Eng Mat Struct

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To assess the life of a new diesel aluminium alloy piston under thermal shock loads, thermo-mechanical fatigue (TMF) testing was conducted to characterise the TMF properties of the piston alloy, and an empirical model based on the constraint ratio concept was proposed to predict the TMF life of the piston. Considering that the empirical model required expensive experimental support, a platform with high-frequency induction heating was established to simulate the force on the piston under thermal shock loads to calculate the piston life using the thermal shock test. Additionally, a finite element method was developed to compute the distributions of temperature, strain, and stress during this process. The characteristics of crack initiation and propagation in TMF test rods and piston mock-ups were also investigated. The results showed that the TMF test rod suffered brittle fracture with brittle quasi-cleavage features. The microcracks mainly occurred in primary Si particles due to stress concentration around the primary Si particles induced by the difference between the thermal expansion coefficients of Si and Al. From a macro perspective, the piston initially cracked at the rim above the pinhole, where the stress is larger than that along other directions. From a micro perspective, the protrusions of various sizes on the piston rim were induced by the compression stresses at high temperature. The piston cracks usually initiate around primary Si particles, propagate along the edge of primary Si in a straight line, bifurcate and then stop at a certain depth. If the piston was only heated, cracks or plastic deformations were not produced. The piston life can be assessed using the proposed empirical model based on the constraint ratio concept or thermal shock testing based on the developed platform. The difference between the predicted and experimental life was not greater than 7%.

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Section: Experimental and Analysis Methodsmentioning

confidence: 99%

Experimental and computational study on thermo‐mechanical fatigue life of aluminium alloy piston

Chen

et al. 2020

Fatigue Fract Eng Mat Struct

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“…However, simulation results show longitudinal expansion. Simulated longitudinal shrinkage values are highly affected by the longitudinal constraint so it is represented as tendon force [18,19]. Predicted values vary according to the FE mesh so it is recommended to use coarse FE mesh in the welding direction.…”

Section: Limitation Of Conventional Equivalent Load Methodsmentioning

confidence: 99%

Modified Equivalent Load Method for Welding Distortion Analysis

Lee

Chung

2020

JMSE

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In this study, modified equivalent load method for welding distortion analysis is suggested to improve its accuracy. To avoid the excessive computational time for welding distortion analysis of large welded structures, shell element-based elastic analysis methods are widely used, applying the inherent deformation approach. Equivalent nodal forces are commonly used in common FE (Finite Element) codes to enter these inherent deformation values. However, the conventional method cannot estimate precise longitudinal bending following the conventional equation. In this study, the problem of the existing equivalent load method is analyzed by a case study, and the modified equivalent load method that can estimate angular distortion, transverse shrinkage, and longitudinal bending is presented based on the FEM principle. The results show that by applying the proposed method, the shell element-based elastic FE approach for the welding distortion analysis can be achieved with improved accuracy.

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“…The local deformation of plates under WS1 and WS2 is smaller than that under WS3, WS4 and WS5. The local deformation of plates comes from two parts (Wang et al, 2013b). One is the angular deformation of fillet weld produced by the non-uniform shrinkage of material along plate thickness direction, which can be controlled by improving the temperature gradient of the heat-effected zone through some welding techniques such as flame heating, heat sinking, preheating and so on.…”

Section: The Influence Of Welding Sequence On Distortionmentioning

confidence: 99%

Influence of welding sequence on welding deformation and residual stress of a stiffened plate structure

Chen

Shenoi

2015

Ocean Engineering

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Experimental and computational analysis of residual buckling distortion of bead-on-plate welded joint

Cited by 63 publications

References 10 publications

Experimental and computational study on thermo‐mechanical fatigue life of aluminium alloy piston

Experimental and computational study on thermo‐mechanical fatigue life of aluminium alloy piston

Modified Equivalent Load Method for Welding Distortion Analysis

Influence of welding sequence on welding deformation and residual stress of a stiffened plate structure

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