A crack propagation simulation for a steel CHS T-joint employing an advanced shell-solid finite element modeling

Tanaka Satoyuki

Maeda Kikuyo

Takahashi Hisashi

Okada Hiroshi

Yagi Kazuhisa

Osawa Naoki

Journal of Marine Science and Technology

An efficient crack propagation (CP) simulation system based on a shell-solid finite element (FE) modeling is newly established. Three-dimensional (3D) CP simulation for a curvilinearly propagating surface crack in a steel circular hollow section (CHS) T-joint is carried out. Entire model is generated by a shell FEs, and cracked welded part is generated by a solid FEs. They are connected with a rigid body element (RBE). Stress intensity factors (SIFs) are computed for analyzing CP rate and CP direction of the crack employing the virtual crack closure-integral method (VCCM) with quadratic tetrahedral FEs. When the crack extends, only solid model is regenerated. To examine the effectiveness of the modeling, fatigue testing and simplified CP simulation results are employed. Hot spot stress (HSS) and weld toe magnification factor (Mk factor) formulas are used for the simplified CP method. CP phenomena of the fatigue test are studied through the fatigue assessment methods.

Fracture mechanics analysis

Tubular joint

Shell-solid modeling

Weld toe magnification factor

英語

Springer

This version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at:https://doi.org/10.1007/s00773-021-00831-z

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[DOI] https://doi.org/10.1007/s00773-021-00831-z ～の異版である