Prediction of crack propagation direction for holes under quasi-static loading

Mohamad, Zaleha and Ariffin, A.K. and Muchtar, A. (2007) Prediction of crack propagation direction for holes under quasi-static loading. In: Proceeding of Computational and Experimental Mechanics (CEM 2007), 27-28 November 2007, Putrajaya, Malaysia.

[img]PDF
670Kb

Abstract

The simulation of crack propagation relies on accurate computing of stress intensity factors (SIFs) at crack tips. Numerical methods are used to calculate the crack propagation path based on the computation of the crack incremental direction and stress intensity factors KI, KII from the finite element response. This paper evaluates displacement extrapolation technique (DET) for prediction of stress intensity factors. The DET is used when the singular element is present at the crack tip and it uses the differential displacements for the adjacent nodes across the crack to compute the stress intensity factors. The crack path and its stress intensity factors are calculated in a specialized finite element program, using small crack increments. At each crack propagation step, the mesh is automatically redefined based on automatic adaptive strategy that takes into account the estimation of stress analysis in two-dimension. The crack is free to propagates without predetermine path direction. Maximum circumferential stress criterion is used as the direction criterion. Some examples are presented to show the results of the implementation.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:finite element; crack propagation holes; stress intensity factor; adaptive mesh
Subjects:T Technology > TA Engineering (General). Civil engineering (General) > TA401-492 Materials of engineering and construction. Mechanics of materials
Divisions:Faculty of Mechanical and Manufacturing Engineering > Department of Engineering Mechanics
ID Code:4275
Deposited By:Normajihan Abd. Rahman
Deposited On:01 Oct 2013 10:17
Last Modified:21 Jan 2015 15:38

Repository Staff Only: item control page