Article ID Journal Published Year Pages File Type
777749 International Journal of Fatigue 2012 7 Pages PDF
Abstract

A novel procedure of singular edge-based smoothed finite element method (singular ES-FEM) has been customized for the fatigue crack growth analysis. For this method, a layer of crack-tip elements with special shape functions was adopted to capture the theoretical singularity of the stress field. In addition, a ‘strain smoothing technique’ on the smoothing domains associated with the elements’ edges was implemented that significantly improves the accuracy of results compared to the existing finite element method. A comparison of results with the experimental observations reported by others reveals an excellent agreement between them implying that singular ES-FEM accurately simulates the fatigue behavior.

► Fatigue analysis has been conducted based on a new method of singular ES-FEM. ► Strain smoothing has been implemented to resolve the overly-stiff behavior of FEM. ► Instead of quadratic elements, a base mesh of linear elements has been adopted. ► New 5-node crack tip elements have been employed to capture stress singularity. ► A simple interpolation has been used instead of isoparametric mapping procedure.

Related Topics
Physical Sciences and Engineering Engineering Mechanical Engineering
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