Analytical Round Robin For Elastic Plastic Analysis Of Surface Cracked Plates
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Phase Ii Results Of An Analytical Round Robin For Elastic Plastic Analysis Of Surface Cracked Plates
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Author : Phillip A. Allen
language : en
Publisher:
Release Date : 2018
Phase Ii Results Of An Analytical Round Robin For Elastic Plastic Analysis Of Surface Cracked Plates written by Phillip A. Allen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with Elastic analysis (Engineering) categories.
The second phase of an analytical round robin for the elastic-plastic analysis of surface cracks in flat plates was conducted under the auspices of ASTM Interlaboratory Study 732. The interlaboratory study (ILS) had ten participants with a broad range of expertise and experience, and experimental results from a surface crack tension test in 4142 steel plate loaded well into the elastic-plastic regime provided the basis for the study. The participants were asked to evaluate a surface crack tension test according to the version of the surface crack initiation toughness testing standard published at the time of the ILS, ASTM E2899, -13, Standard Test Method for Measurement of Initiation Toughness in Surface Cracks under Tension and Bending. Data were provided to each participant that represented the fundamental information that would be provided by a mechanical test laboratory prior to evaluating the test result. Participants were asked to interpret the test according to E2899, including evaluation of crack-front constraint, determination of a critical initiation angle along the crack front, determination of the deformation regime of the test, and determination of the critical J-integral value. The choice of finite element analysis constitutive models and treatment of the stress-strain data was left to the discretion of the participants. The hope was that this process would familiarize participants with the standard and provide the task group with very helpful feedback regarding the interpretation of the requirements as they are written. Overall the participants' test analysis results were in good agreement and constructive feedback was received that has resulted in an improved published version of the standard E2899-15.
Analytical Round Robin For Elastic Plastic Analysis Of Surface Cracked Plates
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Author : National Aeronautics and Space Administration (NASA)
language : en
Publisher: Createspace Independent Publishing Platform
Release Date : 2018-05-23
Analytical Round Robin For Elastic Plastic Analysis Of Surface Cracked Plates written by National Aeronautics and Space Administration (NASA) and has been published by Createspace Independent Publishing Platform this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-05-23 with categories.
"An analytical round robin for the elastic-plastic analysis of surface cracks in flat plates was conducted with 15 participants. Experimental results from a surface crack tension test in 2219-T8 aluminum plate provided the basis for the inter-laboratory study (ILS). The study proceeded in a blind fashion given that the analysis methodology was not specified to the participants, and key experimental results were withheld. This approach allowed the ILS to serve as a current measure of the state of the art for elastic-plastic fracture mechanics analysis. The analytical results and the associated methodologies were collected for comparison, and sources of variability were studied and isolated. The results of the study revealed that the J-integral analysis methodology using the domain integral method is robust, providing reliable J-integral values without being overly sensitive to modeling details. General modeling choices such as analysis code, model size (mesh density), crack tip meshing, or boundary conditions, were not found to be sources of significant variability. For analyses controlled only by far-field boundary conditions, the greatest source of variability in the J-integral assessment is introduced through the constitutive model. This variability can be substantially reduced by using crack mouth opening displacements to anchor the assessment. Conclusions provide recommendations for analysis standardization. Wells, D. N. and Allen, P. A. Marshall Space Flight Center ELASTIC PROPERTIES; FLAT PLATES; SURFACE CRACKS; PLASTIC PROPERTIES; MATHEMATICAL MODELS; ALUMINUM; FRACTURE MECHANICS; CRACK OPENING DISPLACEMENT; J INTEGRAL; STRESS-STRAIN RELATIONSHIPS; CONSTITUTIVE EQUATIONS; BOUNDARY CONDITIONS; FAR FIELDS; FINITE ELEMENT METHOD; STANDARDIZATION; MODULUS OF ELASTICITY"
Analytical Round Robin For Elastic Plastic Analysis Of Surface Cracked Plates
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Author : D. N. Wells
language : en
Publisher:
Release Date : 2012
Analytical Round Robin For Elastic Plastic Analysis Of Surface Cracked Plates written by D. N. Wells and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
Analytical Round Robin For Elastic Plastic Analysis Of Surface Cracked Plates
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Author : D. N. Wells
language : en
Publisher:
Release Date : 2012
Analytical Round Robin For Elastic Plastic Analysis Of Surface Cracked Plates written by D. N. Wells and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
Analytical Round Robin For Elastic Plastic Analysis Of Surface Cracked Plates
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Author : D. N. Wells
language : en
Publisher:
Release Date : 2012
Analytical Round Robin For Elastic Plastic Analysis Of Surface Cracked Plates written by D. N. Wells and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Aluminum categories.
Elastic Plastic Analysis Of Cracked Plates
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Author : Peter Daniel Hilton
language : en
Publisher:
Release Date : 1969
Elastic Plastic Analysis Of Cracked Plates written by Peter Daniel Hilton and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1969 with categories.
A Comparison Of Single Cycle Versus Multiple Cycle Proof Testing Strategies
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Author : R. C. McClung
language : en
Publisher:
Release Date : 1999
A Comparison Of Single Cycle Versus Multiple Cycle Proof Testing Strategies written by R. C. McClung and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with categories.
Elastic Plastic Analysis Of Surface Cracks
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Author : Charles Samuel White
language : en
Publisher:
Release Date : 1982
Elastic Plastic Analysis Of Surface Cracks written by Charles Samuel White and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with Elastoplasticity categories.
Applied Mechanics Reviews
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Author :
language : en
Publisher:
Release Date : 1948
Applied Mechanics Reviews written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1948 with Mechanics, Applied categories.
On The Two Parameter Characterization Of Elastic Plastic Crack Front Fields In Surface Cracked Plates
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Author : Y-Y Wang
language : en
Publisher:
Release Date : 1993
On The Two Parameter Characterization Of Elastic Plastic Crack Front Fields In Surface Cracked Plates written by Y-Y Wang and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Continuum mechanics categories.
Plane-strain elastic-plastic crack-tip fields at a constant J and various elastic T-stress levels were obtained in a modified boundary layer (MBL) formulation similar to that of Betegón and Hancock but with a slightly different power law hardening stress-strain law. The analyses were based upon small geometry change formulation and deformation theory plasticity. To verify the two-parameter characterization of elastic-plastic crack-tip fields, three-dimensional (3-D) elastic-plastic finite element (FE) analyses were performed on plates with deep (a/t = 0.60) and shallow (a/t = 0.15) semielliptical surface cracks under both remote tension and bending. Here t is the plate thickness and a is the maximum penetration of the crack through the plate thickness. In topological planes perpendicular to the semielliptical crack fronts, the crack-opening stress fields, normalized by the local J, were compared with the plane-strain MBL predictions based upon the local J and T. In all four cases studied, better than 94% agreement between the 3-D FE solutions and the plane-strain solutions was obtained for loads up to general yielding. This remarkable agreement held throughout all crack-front locations where the stress fields could be resolved accurately. Given the vastly different distributions of J, T, and crack-opening stress profiles along the collective set of respective crack fronts, the elastic T-stress appears to be a tractable, predictive parameter in quantifying elastic-plastic crack-front stress constraint.