Calculation of Mixed Mode Fracture Stress Intensity Factors in an Orthotropic Plate Using Finite Element Technique

1986 ◽  
Vol 108 (3) ◽  
pp. 282-287 ◽  
Author(s):  
A. Hurlbut ◽  
F. T. C. Loo
Keyword(s):  
Finite Element ◽  
Stress Intensity ◽  
Stress Intensity Factors ◽  
Current Approach ◽  
Mixed Mode Fracture ◽  
Intensity Factors ◽  
Orthotropic Plates ◽  
Finite Element Technique ◽  
Practical Engineering ◽  
Element Technique

A finite element technique using the eight-node quadrilateral isoparametric element is presented to calculate stress intensity factors in orthotropic plates. The procedure is general so as to include multilayered laminates with varying laminae directions and thicknesses. This method can easily solve problems with various loading conditions and plate geometry. Several examples with solutions available in literature are solved to examine the accuracy of the current approach. Solutions of more complicated and practical engineering fracture problems are also presented to demonstrate the versatility of this method.

scholarly journals Analysis of cracked plate membrane problem using Metis finite element model

2002 ◽  
Vol 24 (4) ◽  
pp. 249-256
Author(s):  
Nguyen Dang Hung ◽  
Tran Thanh Ngoc
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Stress Intensity ◽  
Stress Intensity Factors ◽  
Element Model ◽  
Intensity Factors ◽  
Isoparametric Element ◽  
Cracked Plate ◽  
Membrane Problem ◽  
Element Technique

A conformable and convergent finite element technique is presented for calculation of stress intensity factors for cracked plate membrane problem, which is based on the formulation of the hybrid displacement finite element method, named "Metis elements". In order to achieve a high convergence, this element is combined with an isoparametric element of Barsoum, in which,  the mid-side nodes are moved to quarter-point position. Many examples are numerically tested for evaluation this model, show that the element HSM has a good performance for calculation of stress intensity factors.

A Coupled SBFEM-FEM Approach for Evaluating Stress Intensity Factors

2013 ◽  
Vol 353-356 ◽  
pp. 3369-3377 ◽  
Author(s):  
Ming Guang Shi ◽  
Chong Ming Song ◽  
Hong Zhong ◽  
Yan Jie Xu ◽  
Chu Han Zhang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Stress Intensity ◽  
Stress Intensity Factors ◽  
Complex Geometry ◽  
Stress Singularity ◽  
Intensity Factors ◽  
Finite Element Software ◽  
Scaled Boundary Finite Element ◽  
Element Method

A coupled method between the Scaled Boundary Finite Element Method (SBFEM) and Finite Element Method (FEM) for evaluating the Stress Intensity Factors (SIFs) is presented and achieved on the platform of the commercial finite element software ABAQUS by using Python as the programming language. Automatic transformation of the finite elements around a singular point to a scaled boundary finite element subdomain is realized. This method combines the high accuracy of the SBFEM in computing the SIFs with the ability to handle material nonlinearity as well as powerful mesh generation and post processing ability of commercial FEM software. The validity and accuracy of the method is verified by analysis of several benchmark problems. The coupled algorithm shows a good converging performance, and with minimum additional treatment can be able to handle more problems that cannot be solved by either SBFEM or FEM itself. For fracture problems, it proposes an efficient way to represent stress singularity for problems with complex geometry, loading condition or certain nonlinearity.

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