Author: Satya N. Atluri
Publisher:
ISBN:
Category :
Languages : en
Pages : 46
Book Description
This is a summary of research performed in the areas: (a) development of two-dimensional hybrid finite element procedures to calculate stress intensity factors corresponding to general r to the minus alpha stress singularities in isotropic as well as anistropic materials; (b) study of the convergence of the assumed displacement hybrid finite element procedure in fracture mechanics problems; (c) development of a three-dimensional hybrid finite element procedure to calculate the elastic combined mode stress-intensity factors K1, K2 and K3 that vary along an arbitrarily curved three-dimensional crack front; (d) hybrid finite element solutions of fundamental three-dimensional crack problems; (e) development of a two-dimensional finite element procedure for analyzing plane problems of fracture involving large-scale yielding conditions and under cyclic loading; (f) study of the J-integral as a ductile fracture initiation condition; (g) studies of finite deformation effects near the crack-tip; (h) analysis of stable crack growth under rising load and study of criteria for loss of stability of growth in ductile materials; and (i) elastic-plastic analysis of effects of crack closure on fatigue crack growth rates. (Author).
Finite Element Elastic-Plastic Analysis of Cracks
Author: Satya N. Atluri
Publisher:
ISBN:
Category :
Languages : en
Pages : 46
Book Description
This is a summary of research performed in the areas: (a) development of two-dimensional hybrid finite element procedures to calculate stress intensity factors corresponding to general r to the minus alpha stress singularities in isotropic as well as anistropic materials; (b) study of the convergence of the assumed displacement hybrid finite element procedure in fracture mechanics problems; (c) development of a three-dimensional hybrid finite element procedure to calculate the elastic combined mode stress-intensity factors K1, K2 and K3 that vary along an arbitrarily curved three-dimensional crack front; (d) hybrid finite element solutions of fundamental three-dimensional crack problems; (e) development of a two-dimensional finite element procedure for analyzing plane problems of fracture involving large-scale yielding conditions and under cyclic loading; (f) study of the J-integral as a ductile fracture initiation condition; (g) studies of finite deformation effects near the crack-tip; (h) analysis of stable crack growth under rising load and study of criteria for loss of stability of growth in ductile materials; and (i) elastic-plastic analysis of effects of crack closure on fatigue crack growth rates. (Author).
Publisher:
ISBN:
Category :
Languages : en
Pages : 46
Book Description
This is a summary of research performed in the areas: (a) development of two-dimensional hybrid finite element procedures to calculate stress intensity factors corresponding to general r to the minus alpha stress singularities in isotropic as well as anistropic materials; (b) study of the convergence of the assumed displacement hybrid finite element procedure in fracture mechanics problems; (c) development of a three-dimensional hybrid finite element procedure to calculate the elastic combined mode stress-intensity factors K1, K2 and K3 that vary along an arbitrarily curved three-dimensional crack front; (d) hybrid finite element solutions of fundamental three-dimensional crack problems; (e) development of a two-dimensional finite element procedure for analyzing plane problems of fracture involving large-scale yielding conditions and under cyclic loading; (f) study of the J-integral as a ductile fracture initiation condition; (g) studies of finite deformation effects near the crack-tip; (h) analysis of stable crack growth under rising load and study of criteria for loss of stability of growth in ductile materials; and (i) elastic-plastic analysis of effects of crack closure on fatigue crack growth rates. (Author).
Some Problems in Elastic-plastic Finite Element Analysis of Cracks
Author: David Moore Parks
Publisher:
ISBN:
Category : Elastic solids
Languages : en
Pages : 240
Book Description
Publisher:
ISBN:
Category : Elastic solids
Languages : en
Pages : 240
Book Description
ZIP3D: An Elastic and Elastic-plastic Finite-element Analysis Program for Cracked Bodies
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 104
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 104
Book Description
Finite Element Analysis of Elastic-plastic Three Dimensional Cracks
Author: Satyanadham Atluri
Publisher:
ISBN:
Category : Elasticity
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category : Elasticity
Languages : en
Pages :
Book Description
Elastic-Plastic Analysis of a Nozzle Corner Crack by the Finite-Element Method
Author: W. Brocks
Publisher:
ISBN:
Category : Crack-opening displacement
Languages : en
Pages : 16
Book Description
The paper presents the results of an elastic-plastic three-dimensional finite-element analysis for a nozzle corner crack in a pressurized reactor test vessel. The calculations were performed by the finite-element program ADINA using the von Mises yield condition and isotropic hardening. The crack plane was taken parallel to the axis of the vessel and the crack front straight and perpendicular to the symmetry line of the nozzle corner in order to obtain the worst position for a nozzle corner crack. The calculations were performed up to that pressure level where general yield of the ligament in the nozzle corner section takes place.
Publisher:
ISBN:
Category : Crack-opening displacement
Languages : en
Pages : 16
Book Description
The paper presents the results of an elastic-plastic three-dimensional finite-element analysis for a nozzle corner crack in a pressurized reactor test vessel. The calculations were performed by the finite-element program ADINA using the von Mises yield condition and isotropic hardening. The crack plane was taken parallel to the axis of the vessel and the crack front straight and perpendicular to the symmetry line of the nozzle corner in order to obtain the worst position for a nozzle corner crack. The calculations were performed up to that pressure level where general yield of the ligament in the nozzle corner section takes place.
Elastic-plastic Finite Element Analysis of Fatigue Crack Growth in Mode 1 and Mode 2 Conditions
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 88
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 88
Book Description
Three-Dimensional Elastic-Plastic Analysis of Shallow Cracks in Single-Edge-Crack-Tension Specimens
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722903398
Category :
Languages : en
Pages : 34
Book Description
Three dimensional, elastic-plastic, finite element results are presented for single-edge crack-tension specimens with several shallow crack-length-to-width ratios (0.05 less than or equal to a/W less than or equal to 0.5). Results showed the need to model the initial yield plateau in the stress-strain behavior to accurately model deformation of the A36 steel specimens. The crack-tip-opening-displacement was found to be linearly proportional to the crack-mouth-opening displacement. A new deformation dependent plastic-eta factor equation is presented for calculating the J-integral from test load-displacement records. This equation was shown to be accurate for all crack lengths considered. Shivakumar, Kunigal N. and Newman, James C., Jr. Langley Research Center RTOP 505-63-01-05...
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722903398
Category :
Languages : en
Pages : 34
Book Description
Three dimensional, elastic-plastic, finite element results are presented for single-edge crack-tension specimens with several shallow crack-length-to-width ratios (0.05 less than or equal to a/W less than or equal to 0.5). Results showed the need to model the initial yield plateau in the stress-strain behavior to accurately model deformation of the A36 steel specimens. The crack-tip-opening-displacement was found to be linearly proportional to the crack-mouth-opening displacement. A new deformation dependent plastic-eta factor equation is presented for calculating the J-integral from test load-displacement records. This equation was shown to be accurate for all crack lengths considered. Shivakumar, Kunigal N. and Newman, James C., Jr. Langley Research Center RTOP 505-63-01-05...
Finite Deformation, Elastic-plastic, Finite Element Analysis of Planar Cracks
Author: Wen-Hwa Chen
Publisher:
ISBN:
Category : Fracture mechanics
Languages : en
Pages : 406
Book Description
Publisher:
ISBN:
Category : Fracture mechanics
Languages : en
Pages : 406
Book Description
Elastic-plastic Finite Element Analysis of Fracture in a Thin Rectangular Plate
Author: James Gerard Malone
Publisher:
ISBN:
Category :
Languages : en
Pages : 232
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 232
Book Description
Numerical Assessments of Cracks in Elastic-Plastic Materials
Author: Huang Yuan
Publisher: Springer Science & Business Media
ISBN: 3540458824
Category : Science
Languages : en
Pages : 318
Book Description
In this book a systematic discussion of crack problems in elastic-plastic materials is presented. The state of the art in fracture mechanics research and assessment of cracks is documented, with the help of analytic, asymptotic methods as well as finite element computations. After a brief introduction to fracture mechanics, the two-parameter concept for stationary cracks is studied in addition to the issues in three-dimensional crack fields under coupling with strong out-of-plane effects. Cracks along interfaces and crack growth problems under mixed mode conditions are also treated. A systematic study of stress singularities for different notches is accompanied by detailed finite element computations.
Publisher: Springer Science & Business Media
ISBN: 3540458824
Category : Science
Languages : en
Pages : 318
Book Description
In this book a systematic discussion of crack problems in elastic-plastic materials is presented. The state of the art in fracture mechanics research and assessment of cracks is documented, with the help of analytic, asymptotic methods as well as finite element computations. After a brief introduction to fracture mechanics, the two-parameter concept for stationary cracks is studied in addition to the issues in three-dimensional crack fields under coupling with strong out-of-plane effects. Cracks along interfaces and crack growth problems under mixed mode conditions are also treated. A systematic study of stress singularities for different notches is accompanied by detailed finite element computations.