Development of a Practical Straightening Simulation for Welded Structures Using Inherent Strain Method

 

Authors

Hector, Ruiz; Naoki, Osawa; Hidekazu, Murakawa; Sherif, Rashed

Format

Article

Status

publishedVersion

Description

Welding is the most widely used assembly method available to industries in the construction of metal structures, ships, and offshore platforms. However, this method always produces a certain amount of distortion that will not only degrade the performance but also increase the building cost of the structure, and it should be straightened. Murakawa [1] developed a thermal elastic plastic based and inherent strain based welding simulation FE code JWRIAN. Coarse shell FE models are usually used in the inherent strain based JWRIAN elastic analyses. This drastically reduces the manpower needed for modeling and computer resources needed for the calculation. However, it is not easy to perform straightening analysis using JWRIAN because gas heating’s inherent strain distributes over a range much smaller than element sizes of the shell model.RUIZ [2] modified JWRIAN’s code so that the inherent strain equivalent nodal forces along the heating line are calculated and applied in the elastic shell analysis. However, a discrepancy between 3-dimensional thermal-elastic-plastic analysis and elastic analysis was observed. This is mainly because of the nature of solid and shell elements. RUIZ [3] proposed a linearized inherent strain and applied it to both 3-d and 2d analysis, getting matching results between solid and shell element models. In this study, as a working example, a thin plate panel with an opening is considered utilizing the developed system at the same time a friendly user interface for staffs and workers on a production site is developed.  Keywords: Inherent strain, straightening, finite element method, Gauss-Legendre quadrature

Publication Year

2018

Language

eng

Topic

Repository

RI de Documento Digitales de Acceso Abierto de la UTP

Get full text

https://knepublishing.com/index.php/KnE-Engineering/article/view/1438
http://ridda2.utp.ac.pa/handle/123456789/4274

Rights

openAccess

License

https://creativecommons.org/licenses/by/4.0/