Browsing by Author "Leitner, M."
Now showing 1 - 2 of 2
Results Per Page
Sort Options
Item FEM Analysis of Fatigue Crack Growth in Low Carbon Steel Using Single Edge Notched Tension Specimen(Springer Nature Singapore Pte Ltd, 2021-02-19) Busari, Y. O.; Manurung, Y. H. P.; Shuaib-Babata, Y. L.; Leitner, M.; CeliK, E.Continuing improvement in the field of virtual crack closure technique of metals provides the opportunity for reliable probabilistic fatigue crack growth. The paper presents an analysis of mode I fatigue crack growth in low carbon steel. Experiment was carried out with Single Edge Notched Tension (SENT) specimens to determine its fatigue crack growth parameters on the specimens under constant amplitude loading. Linear elastic fracture mechanic crack path was modelled with the finite element method according to its experimental observation using the virtual crack closure technique (VCCT) in MSC Marc/Mentat. The simulation predicts the fatigue crack growth rate in high cycle fatigue. The simulated fatigue crack growth rate (FCGR) produced using SENT model represents good similar feature with the experimental process at stress ratio R = 0 Based on the remeshing model, it is also found that the results of crack growth rate and cycle count show good agreement within acceptable discrepancy compared to the experiment from Paris law diagramItem Numerical Evaluation of Fatigue Crack Growth of Structural Steels using Energy Release Rate with VCCT.(MDPI, Basel, Switzerland, 2022-03) Busari, Y. O.; Manurung, Y.H.P.; Leitner, M.; Shuaib‐Babata, Y. L.; Mat, M. F.; Ibrahim, H. K.; Simunek, D.; Sulaiman, M. S.This research presents the numerical evaluation of fatigue crack growth of structural steels S355 and S960 based on Paris’ law parameters (C and m) that are experimentally determined with a single edge notched tension (SENT) specimen using optical and crack gauge measurements on an electromotive resonance machine at constant amplitude load. The sustainable technique is replacing destructive, time‐consuming and expensive approaches in structural integrity. The crack propagation is modelled using the 3D finite element method (FEM) with adaptive remeshing of tetrahedral elements along with the crack initiator elements provided in simulation software for crack propagation based on linear elastic fracture mechanics (LEFM). The stress intensity is computed based on the evaluation of energy release rates according to Irwin’s crack closure integral with applied cyclic load of 62.5 MPa, 100 MPa and 150 MPa and stress ratios of R = 0 and 0.1. In order to achieve optimized mesh size towards load cycle and computational time, mesh and re‐mesh sensitivity analysis is conducted. The results indicate that the virtual crack closure technique VCCT‐based 3D FEM shows acceptable agreement compared to the experimental investigation with the percentage error up to 7.9% for S355 and 12.8% for S960 structural steel.