A Three-Dimensional Finite Element Analysis of the Stress Intensity Factors for Different Fracture Modes of Homogeneous Bimaterial

The scattered-light photoelastic technique was utilized to determine Mode I stress intensity factors associated with a semi-elliptical surface flaw in a plate subjected to uniaxial tension. Stress intensity factors were experimentally determined for the point of maximum flaw penetration and the point of intersection of the flaw border with the free surface of the plate. Experimental results are compared to those obtained in a three-dimensional finite element analysis with reasonable agreement being shown.

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Bolted Joint Fracture Analysis Study Using Modern Methods

Volume 2: Computer Technology and Bolted Joints ◽

10.1115/pvp2012-78511 ◽

2012 ◽

Author(s):

David Griffin ◽

Gary Reed ◽

Andrew Mills ◽

Russell Brayshaw

Keyword(s):

Finite Element ◽

Stress Intensity ◽

Stress Intensity Factors ◽

Three Dimensional ◽

Pressure Vessels ◽

Intensity Factors ◽

Extended Defect ◽

Joint Fracture ◽

Dimensional Finite Element ◽

Three Dimensional Finite Element

This paper describes the outcome of a fracture study to ascertain the benefits of using modern three dimensional finite element techniques. The defects considered are postulated to be present at the root of a threaded fastener. The defects are explicitly modelled using three dimensional finite element analysis to extract the relevant fracture parameters. A large number of thumbnail defects of varying size and aspect ratio have been incorporated into the root of the first engaged thread of studs typically used in pressure vessels. Stress intensity factors at the defect surface and depth locations have been extracted for a number of thermal transient events using a domain integration technique within the general finite element code ANSYS. The above stress intensity factors were then used to generate fracture calculations using an R6 based procedure [1] for: • Toughness-based fracture margins for each defect modelled; • Critical defect size; • Comparisons with a fully extended defect.

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Finite Element Analysis of Nonuniformity of Tires with Imperfections5

Tire Science and Technology ◽

10.2346/1.2768607 ◽

2007 ◽

Vol 35 (3) ◽

pp. 226-238 ◽

Cited By ~ 1

Author(s):

K. M. Jeong ◽

K. W. Kim ◽

H. G. Beom ◽

J. U. Park

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Three Dimensional ◽

Element Model ◽

Radial Force ◽

Element Analysis ◽

The Finite Element Analysis ◽

Dimensional Finite Element ◽

Force Variation ◽

Three Dimensional Finite Element

Abstract The effects of variations in stiffness and geometry on the nonuniformity of tires are investigated by using the finite element analysis. In order to evaluate tire uniformity, a three-dimensional finite element model of the tire with imperfections is developed. This paper considers how imperfections, such as variations in stiffness or geometry and run-out, contribute to detrimental effects on tire nonuniformity. It is found that the radial force variation of a tire with imperfections depends strongly on the geometrical variations of the tire.

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