Results 111 to 120 of about 232 (144)

Plastic CTOD as fatigue crack growth characterising parameter under variable amplitude loading by using DIC

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Dugdale plastic zone size and CTOD equations for the compact specimen

International Journal of Fracture, 1984
With the aim of applying the Dugdale model to the compact specimen, the equations for stress intensity factor and crack surface displacement are obtained for a pair of pin loads and a uniform stress acting on a segment of the crack surface. The plastic zone size is calculated from the 'finiteness' condition of Dugdale, and the results agree well with ...
J. C. Newman, S. Mall
exaly   +2 more sources

Fatigue crack growth versus plastic CTOD in the 304L stainless steel

Engineering Fracture Mechanics, 2019
Abstract The plastic CTOD range, δp, which quantifies crack tip plastic deformation, is used to study fatigue crack propagation instead of the classical ΔK elastic parameter. A da/dN-δp model was defined for the 304L stainless steel. da/dN was obtained experimentally in standard CT specimens while δp was predicted numerically using the finite element
F V Antunes, Ricardo Branco, Pedro A Prates   +2 more
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Research on CTOD for low-cycle fatigue analysis of central-through cracked plates considering accumulative plastic strain

Engineering Fracture Mechanics, 2016
Abstract The plastic strain accumulation at the crack tips are used as controlling parameter to estimate cyclic CTOD for low-cycle failure analysis of the central-through cracked plate. The second order polynomial for the normalized CTOD defined as a function of the accumulative plastic strain, the ratio of mean stress to the yield stress, and the ...
Junlin Deng, Ping Yang
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Measurements of CTOD and CTOA Around Surface-Crack Perimeters and Relationships Between Elastic and Elastic-Plastic CTOD Values

1990
A difficulty associated with predicting structural integrity is that the surface cracks found in structural components are three-dimensional whereas the crack-tip opening displacement (CTOD) and J-integral analytical techniques were derived from two-dimensional theory.
WG Reuter, WR Lloyd
exaly   +2 more sources

Numerical determination of plastic CTOD

Fatigue & Fracture of Engineering Materials & Structures, 2018
AbstractIn previous works, a da/dN versus plastic crack tip opening displacement model was proposed to study fatigue crack growth. The plastic crack tip opening displacement, δp, which quantifies the crack tip plastic deformation, is determined numerically using the finite element method.
F.V. Antunes, F.A. Díaz, J.M. Vasco‐Olmo, P. Prates   +3 more
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On the plastic zone size and CTOD study for a Zener–Stroh crack interacting with a circular inclusion

Acta Mechanica, 2011
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Hoh, H. J., Xiao, Z. M., Luo, J.
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J and CTOD Estimation Procedure for Circumferentially Cracked Pipes Based on Fully-Plastic Solutions

2010 8th International Pipeline Conference, Volume 2, 2010
This work provides an estimation procedure to determine the J-integral and CTOD for pipes with circumferential surface cracks subjected to bending load for a wide range of crack geometries and material (hardening) based upon fully-plastic solutions. A summary of the methodology upon which J and CTOD are derived sets the necessary framework to determine
Mario S. G. Chiodo, Claudio Ruggieri
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A method for the metallographical measurement of the CTOD at cracking initiation and the role of reverse plasticity on unloading

Engineering Fracture Mechanics, 2000
A method is proposed for accurately estimating the Crack Tip Opening Displacement (CTOD) at physical cracking initiation in ductile materials. The method requires a few precracked specimens to be loaded in such a way as to exhibit various crack extensions.
T Pardoen, F Delannay
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Elastic-plastic fracture toughness of PC/ABS blend based on CTOD and J-integral methods

Polymer, 1996
Abstract The elastic-plastic fracture toughness of a PC/ABS blend has been investigated simultaneously by the conventional J-integral and the crack tip opening displacement (CTOD) methods for specimen thickness varying from 4 to 15 mm. The critical J (Jc) and the critical CTOD (δc) are based on crack initiation.
Ming-Luen Lu, Kuo-Chan Chiou, Feng-Chih Chang   +2 more
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