Numerical prediction and mitigation of out-of-plane welding distortion in ship panel structure by elastic FE analysis

Finite Element Simulation of Welding Distortion in Dissimilar Joint by Inherent Deformation Method

“…In a welded structure, the creep and thermal strains are negligible and can be ignored [6]. So, in welding, the amount of inherent strain in each direction is equal to the amount of plastic strain in that direction, and Equation 1 is rephrased as Equation 2:…”

“…It is possible to calculate inherent deformation and apply it in the model instead of applying the distribution of inherent strains in the elastic model. The amounts of inherent deformations can be derived by integrating inherent strains over their distribution zone according to Equations 3-6 [6]:…”

“…In 2008, he showed how a structure could be simulated in case there was either an initial gap or some initial distortion between plates [5]. Subsequently, Wang used inherent deformation concept to predict the distortion of a large panel from the deck of a ro-ro ship by simulation in Abaqus FE Software Package [6]. In 2014, Wang designed a full panel of a ro-ro ship, and then he predicted and reduced the distortion by an inherent deformation method [7].…”

Characterisation of transient out-of-plane distortion of nipple welding with header component

“…This involves groove and fillet welding of tubes with pipes in circumferential and longitudinal orientation. The out-of-plane distortion of plates with T-joint configuration due to longitudinal welding was reported by few researchers [1,2]. The distortion mechanism due to circumferential welding is different from longitudinal welding.…”

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

“…The assembly process of welded structural parts was considered in the methods by means of interface elements. Wang et al (2013a) applied an elastic FEM based on inherent deformation theory to a car carrier ship's structure. The prediction of the out-of-plane welding distortion for the ship's panel structure was carried out and mitigation measurements using line heating were employed to reduce welding distortion.…”