Effect of T-stress on fatigue crack closure in 3-D small-scale yielding

Roychowdhury, Sushovan; Dodds, Robert H.

doi:10.1016/j.ijsolstr.2003.11.004

Cited by 66 publications

(35 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It can also be used to mathematically explore the effect on shape of the crack tip stress field of changes in magnitude of the various parameters; for, example, the effect of variation in magnitude of increasing positive or negative T-stress on crack tip fringe patterns representing the difference between the principal stresses. Such fringes are directly comparable with photoelastic fringe patterns and the model supports the conclusions reached by Roychowdhury and Dodds [23] and Kim et al [24] regarding the influences of T-stress. The model can also be used with the displacement fields generated by digital image correlation (DIC) techniques and hence used with metallic specimens.…”

Section: Plasticity Effects For a Growing Cracksupporting

confidence: 89%

Local crack plasticity and its influences on the global elastic stress field

James

Christopher

et al. 2013

International Journal of Fatigue

View full text Add to dashboard Cite

Section: Plasticity Effects For a Growing Cracksupporting

confidence: 89%

Local crack plasticity and its influences on the global elastic stress field

James

Christopher

et al. 2013

International Journal of Fatigue

View full text Add to dashboard Cite

“…Larger values of T-stress increase this deviation which in turn causes a reduction in apparent fracture toughness. Apart from crack paths, directional stability problems and crack initiation angle, the effects of the T-stress on the crack growth rate, crack tip constraints, crack closure, and the shape and size of the plastic zone ahead of the crack tip have also been assessed by many workers [8,9].…”

Section: Introductionmentioning

confidence: 99%

T-stress determination using thermoelastic stress analysis

Zanganeh

Tomlinson

Yates

2008

The Journal of Strain Analysis for Engineering Design

View full text Add to dashboard Cite

T-stress and mixed-mode stress intensity factors have been determined experimentally using thermoelastic stress analysis and using a finite element method. Pure mode I, strong mixed-mode I and II, and interacting cracks have been used as the case studies. A new technique has been proposed to identify the crack tip from thermoelastic images. It has also been shown that using three terms of Williams's stress field formulation to determine the Tstress, yields a more accurate solution than using only the first two terms of the expansion.

show abstract

“…Their results, and those reported by Nakamura and Parks (1990), revealed that strong 3D effects are present within a radial distance of about one-half plate thickness from the crack front. The necessity of an additional parameter (apart from J ) suitable to characterize constraint effects in 3D mode I fracture problems is addressed by several authors (see for example, Faleskog, 1995;Yuan and Brocks, 1998;Kim et al, 2001;Roychowdhury and Dodds, 2004;Yusof and Hancock, 2005). Kim et al (2003) studied crack growth in ductile solids by simulating a population of several spherical voids in a 3D SSY model.…”

Section: Introductionmentioning

confidence: 99%

A Three-dimensional Numerical Study of Mixed Mode (I and II) Crack Tip Fields in Elastic–plastic Solids

2005

View full text Add to dashboard Cite

The stress fields near a crack front in a ductile solid are essentially three-dimensional (3D) in nature. The objective of this paper is to investigate the structure of these fields and to establish the validity of two-dimensional (2D) plane stress and plane strain approximations near the crack front under mixed mode (combined modes I and II) loading. To this end, detailed 3D and 2D small strain, elastic-plastic finite element simulations are carried out using a boundary layer (small scale yielding) formulation. The plastic zones and radial, angular and thickness variations of the stresses are studied corresponding to different levels of remote elastic mode mixity and applied load, as measured by the plastic zone size with respect to the plate thickness. The 3D results are compared with those obtained from 2D simulations and asymptotic solutions. It is found that, in general, plane stress conditions prevail at a distance from the crack front exceeding half the plate thickness, although it could be slightly smaller for mode II predominant loading. The implications of the 3D stress distribution on micro-void growth near the crack front are briefly discussed.

show abstract

Effect of T-stress on fatigue crack closure in 3-D small-scale yielding

Cited by 66 publications

References 28 publications

Local crack plasticity and its influences on the global elastic stress field

Local crack plasticity and its influences on the global elastic stress field

T-stress determination using thermoelastic stress analysis

A Three-dimensional Numerical Study of Mixed Mode (I and II) Crack Tip Fields in Elastic–plastic Solids

Contact Info

Product

Resources

About