Shape Prediction of Fatigue Crack Based on a Given Stress Intensity Factor Distribution |
| Journal |
Key Engineering Materials (Volumes 353 - 358) |
| Volume |
Progresses in Fracture and Strength of Materials and Structures |
| Edited by |
Yu Zhou, Shan-Tung Tu and Xishan Xie |
| Pages |
19-23 |
| DOI |
10.4028/www.scientific.net/KEM.353-358.19 |
| Online since |
September, 2007 |
| Authors |
Zhi Xue Wu
|
| Keywords |
3D Finite Element Analysis, Linear Elastic Fracture Mechanics, Stress Intensity Factor (SIF), Surface Crack, Through-crack |
| Abstract |
There is an inherent relationship between the shape and the corresponding stress intensity
factor (SIF) distribution of a crack. A typical inverse problem of linear elastic fracture mechanics
about a crack, i.e. to predict the shape of a crack assuming that some information of SIF distribution is
known, is presented. A finite-element based numerical procedure is used to determine the shape,
correspondingly the SIF, of a mode-I planar crack based on a specified SIF distribution. The crack
front is modeled using cubic splines, which are determined by a number of control-points. The crack
front shape is achieved iteratively by moving control-points based on a gradientless algorithm.
Numerical examples for planar cracks in through-cracked and surface-cracked plates with finite
thickness and width are presented to show the validity and practicability of the proposed method. The
SIFs obtained by present method are compared with the known solutions for cracks with same
dimensions. The presented method is considered to be a promising alternative to the evaluation of
SIFs and the prediction of shape evolution for fatigue cracks. |
| Full Paper |
Get the full paper by clicking here
|
| Preview |
Free first page example |
