Fatigue Crack Growth Simulation by Using S-Version FEM

Abstract:

Fatigue crack growth under mixed mode loading conditions is simulated using S-version FEM (Superposition FEM, S-FEM). By using S-FEM technique, only local mesh should be re-meshed and it becomes easy to simulate crack growth. By combining with re-meshing technique, local mesh is re-meshed automatically, and curved crack path is modeled easily.

• Periodical: Key Engineering Materials (Volumes 385-387)
• Pages: 761-764
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.385-387.761
• Online since: July 2008
• Authors: Masanori Kikuchi, Yoshitaka Wada, Maigefeireti Maigefeireti, Y. Li
• Keywords: 3-Dimensional Plural Cracks, Fatigue Crack Growth (FCG), Mix-Mode Condition, S-Version FEM

References

[5] is recorded the plural cracks problem but it is refined in two-dimensional problem. The result in this paper showed the spatial crack growth of plural cracks. The growth trend was almost same with two-dimensional result. Fig. 8 two cracks configuration at step 10 Fig. 9 two cracks configuration at step 15 Using S-FEM to conduct plural cracks is more flexible because the local models containing crack were re-meshed seperately. Using the general FEM, re-meshing will become complex and difficult when two crack tips get closer. S-FEM avoid this difficulty and can also get good simulation result. Summary S-FEM was adopted to calculate several fatigue crack problems. From the result, we can find that S- FEM is a feasible. And combined with Richard's criteria it is easy to applied to fatigue fracture. Especially, it is very useful in three-dimensional problem. It can avoid some difficulties occurred in general FEM. References.

DOI: 10.1108/ijsi-10-2019-0107

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