scholarly journals The Dugdale Model for Compact Specimen

2008 ◽  
pp. 113-113-16 ◽  
Author(s):  
S Mall ◽  
JC Newman
Keyword(s):  
Compact Specimen ◽  
Dugdale Model

Elasto-Plastic Stress Analysis of the Standard Compact Specimen

1983 ◽  
Vol 105 (2) ◽  
pp. 132-137 ◽  
Author(s):  
H. Terada
Keyword(s):  
Stress Analysis ◽  
Crack Opening ◽  
Plastic Zone Size ◽  
Width Ratio ◽  
Compact Specimen ◽  
Intensity Factors ◽  
Model Concept ◽  
Dugdale Model ◽  
Load Line ◽  
Plastic Analysis

Two-dimensional stress analysis for the standard compact specimen under plane stress and plane strain conditions were carried out by using the boundary collocation method. The Dugdale model concept was employed for elasto-plastic analysis. Plastic zone size and crack opening displacements at the typical locations, such as edge of plate, load line, and crack tip, were calculated for the practical range of applied load, and crack length-to-width ratio in the fracture toughness tests. In the process of elasto-plastic analysis, crack opening displacements and stress intensity factors corresponding to the elastic solution of the compact specimen were obtained. These results were shown to reasonably agree with those derived by Srawley and Gross, and by Newman.

A Novel Singular Finite Element on Mixed-Mode Dugdale Model Based Crack

2012 ◽  
Vol 134 (2) ◽  
Author(s):  
W. A. Yao ◽  
X. F. Hu
Keyword(s):  
Finite Element ◽  
Analytical Solutions ◽  
Mixed Mode ◽  
Crack Tip ◽  
Dugdale Model ◽  
Dual Approach ◽  
Singular Finite Element ◽  
Crack Tip Opening ◽  
Method Show ◽  
Dugdale Crack

The symplectic dual approach is employed to obtain the analytical solutions of displacements and stresses around the mixed-mode Dugdale crack tip. Based on the analytical solutions, a novel singular finite element is developed to study the problem. The singular finite element can be applied to determine the sizes of crack tip opening/sliding displacement of a mixed-mode Dugdale model. Numerical results obtained by the present method show excellent agreement with the existing analytical solutions.

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