Crack Growth Simulation at Welded Part of LNG Tank
Abstract
The objective of this research is to evaluate crack growth behavior from a surface crack to a through crack in a liquefied natural gas (LNG) tank . Crack growth behavior is analyzed by superposition version FEM (S-FEM). As a crack grows, part of the local mesh crosses over the global mesh. In S-FEM, the local mesh is defined as existing in the global mesh. When a part of the local mesh crosses over the global mesh, the Young’s modulus of the part is made small to ignore the influence of the part. In this way, the stress distribution of the local mesh is improved. In this study, crack growth behavior under a tensile cyclic load is analyzed. After crack penetration, the crack shape becomes rectangular. Crack growth behavior under tensile bending loading is also analyzed by simulating the four-point bending test. In this simulation, the crack shape becomes trapezoidal after penetration.
##Keywords:##
Fatigue Crack; S-version FEM; Surface Crack; Through Crack.
Published
Jan 20, 2014
How to Cite
SUGA, Kazuhiro; ENDO, Takafumi; KIKUCHI, Masanori.
Crack Growth Simulation at Welded Part of LNG Tank.
Journal of Ocean, Mechanical and Aerospace -science and engineering-, [S.l.], v. 3, n. 1, p. 1-7, jan. 2014.
ISSN 2527-6085.
Available at: <https://isomase.org/Journals/index.php/jomase/article/view/518>. Date accessed: 17 apr. 2026.
doi: http://dx.doi.org/10.36842/jomase.v3i1.518.
References
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2. Mori, T., Kyung, K.S., Miki, C. (1998). The Influence of Static Strength of Steel and Weld Material on Fatigue Strength of Cruciform Filet Welded Joints, Journal of Structural Mechanics and Earthquake Engineering, Vol. 605, No. I-45, pp. 289-293. (in Japanese).
3. Mitsui, Y., Kurobane, Y., Harada, K., Konomi, M. (1983). Fatigue Crack Growth Behaviors at the Toe of Fillet Welded Joints under Plane Bending Load, Journal of the Japan Welding Society, Vol. 52, No. 3, pp. 288-305. (in Japanese).
4. Nagai, K., Iwata, M., Sung-Won Kang, SOEWEIFY, (1981). A Consideration on the Fatigue Strength of Fillet Welded Cruciform Joints of Mild Steel under Completely Reversed Bending, Journal of the Society of Naval Architects of Japan, Vol. 149, pp. 260-267.
5. Fish, J., Markolefas, S., Guttal, R., Nayak, P. (1994). On Adaptive Multilevel Superposition of Finite Element Meshes, Applied Numerical Mathematics, Vol. 14, pp. 135-164.
6. Okada, H., Endoh, S., Kikuchi, M., (2005).Application of S-Version Finite Element Method to Two Dimensional Fracture Mechanics Problems, Transactions of the Japan Society of Mechanical Engineers Ser. A, Vol. 71, No. 704, pp. 677-684. (in Japanese).
7. Kikuchi, M., Wada, Y., Takahashi, M., Li Y. (2008). Fatigue Crack Growth Simulation Using S-version FEM, Transactions of the Japan Society of Mechanical Engineers Ser. A, Vol. 74, No. 742, pp. 812-818. (in Japanese). 8. Suzuki, K., Sando, A., Shimura, D., Ohtsubo, H., (2004). Study on the Local Area Exceeding Global Area in Mesh Superposition Method, Applied Mechanics, Vol. 7, pp. 383-389.
9. Okada, H., Higashi, M., Kikuchi, M., Fukui, Y., Kumazawa, M., (2005). Three dimensional Virtual Crack Closure-integral Method (VCCM) with Skewed and Non-symmetric Mesh Arrangement at the Crack Front, Engineering Fracture Mechanics, Vol. 72, pp. 1717-1737.
10. Paris, P.C., Erdogan, F. (1963). A Critical Analysis of Crack Propagation Laws, Journal of Basic Engineering, Trans. ASME, Ser. D, Vol. 85, pp. 528-535.
11. Lin, X.B., Smith, R.A. (1999). Finite Element Modeling of Fatigue Crack Growth of Surface Cracked Plates Part II: Crack Shape Change, Engineering Fracture Mechanics, Vol. 63, pp. 523-540.
12. Hosseini, A., MAHMOUD, M.A. (1985). Evaluation of Stress Intensity Factor and Fatigue Growth of Surface Cracks in Tension Plates, Engineering Fracture Mechanics, Vol. 22, pp. 957-974.
13. Nam, K.W., Matsui, K., Ando, K., Ogura, N. (1969). The Fatigue Life and Fatigue-Crack-Through-Thickness Behavior of a Surface-Cracked Plate (3rd Report, In the Case of Combined Tensile and Bending Stress), Transactions of the Japan Society of Mechanical Engineers Ser. A, Vol. 55, No. 51, pp. 1740-1747. (in Japanese).
14. Tateishi, K., Kyung, K.,S., Machida F., Miki, C. (1996). Influence of Welding Materials on Fatigue Strength of Fillet Welded Joints Made from High Strength Steel, Journal of Structural Mechanics and Earthquake Engineering, Vol.543,No. I-36, pp. 133-140. (in Japanese).
