Experimental study of the T-criterion in ductile fractures

Theocaris, P. S.; Kardomateas, G. A.; Andrianopoulos, N. P.

doi:10.1016/0013-7944(83)90040-1

Cited by 76 publications

(25 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Many criteria have been proposed to predict crack growth direction, including maximum tangential stress, strain energy density, maximum tangential strain, the T criterion and the J criterion (e.g. references [10] and [23]). The parameters proposed for correlating the fatigue crack growth rate under mixed-mode loading include effective stress intensity factor, equivalent strain intensity factor and the J integral (e.g.…”

Section: Crack Propagationmentioning

confidence: 99%

Mixed-mode fatigue crack propagation in thin T-sections under plane stress

Gowhari-Anaraki

Hardy

Adibi-Asl

2003

The Journal of Strain Analysis for Engineering Design

View full text Add to dashboard Cite

Data that can be used in the fatigue analysis of¯at T-section bars subjected to axial loading and local restraint are presented. The paper describes how ®nite element analysis has been used to obtain stress ®elds in the vicinity of a crack or crack-like¯aw introduced into the ®llet (i.e. high-stress) region of the component. The effect of both the position and inclination of the crack has been investigated. The inclination of the crack to the transverse direction is varied in such a way that a combination of mode I (tension opening) and mode II (in-plane shear) crack tip conditions are created in the component when subjected to axial loading which is applied to the entire¯at shoulder of the projection. Linear elastic fracture mechanics ®nite element analyses have been performed, and the results are presented in the form of J integrals and notch and crack con®guration factors for a wide range of component and crack geometric parameters. These parameters are chosen to be representative of typical practical situations and have been determined from evidence presented in the open literature. The extensive range of notch and crack con®guration factors obtained from the analyses are then used to obtain equivalent prediction equations using a statistical multiple non-linear regression model. The accuracy of this model is measured using a multiple coef®cient of determination, R 2 , where 0 < R 2 < 1. This coef®cient is found to be greater than or equal to 0.98 for all cases considered in this study, demonstrating the quality of the model ®t to the data. Predictive equations for stress intensity factors and J-integral values, which are based on the elastic stress concentration factor, are also developed. A crack propagation methodology, based on existing theory coupled with these predictive equations, is then presented for this type of component and loading.

show abstract

Section: Crack Propagationmentioning

confidence: 99%

Mixed-mode fatigue crack propagation in thin T-sections under plane stress

Gowhari-Anaraki

Hardy

Adibi-Asl

2003

The Journal of Strain Analysis for Engineering Design

View full text Add to dashboard Cite

show abstract

“…Theocaris [13,14] suggested the T criterion for the correlation of both the fracture load and direction. For the T criterion, the elastic-plastic interface, instead of a core radius as in S, is a natural choice for the calculation of strain energy distribution around the crack tip.…”

Section: The S and T Criteria For Fracture And Fatigue Crack Growthmentioning

confidence: 99%

Fatigue Crack Growth Under Biaxial Loading

Lam¹

1993

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

Fatigue crack growth under biaxial loading for long cracks subjected to low cyclic stress levels was investigated. The biaxial stress ratio I ranging from -0.5 to + 1.0 was considered. The strain energy density factor range was used as the criterion for predicting the crack growth rates and crack path. The agreement between prediction and experimental results was reasonable for crack growth rates and marginal for crack paths. The investigation highlighted the inherent difficulties for crack path prediction and indicated the increased sensitivity to initial crack angle and biaxiaI stress ratio when the biaxial stress ratio approaches unity. 429

show abstract

“…Apart from the above mentioned, four more criteria viz the maximum potential energy release rate criterion, the Maximum Tangential Strain criterion (MTSN) based on the near tip strains, the Energy Momentum Tensor criterion based on Eshelby's energy momentum vector, and the T-criterion have been proposed by Palaniswamy and Knauss [1 1], Wu [12], Tirosh [13] and Theocaris [14] respectively. However, in accordance with the trend shown in literature, attention is focussed on the first two criteria.…”

Section: The Strain Energy Density Criterion (Sed )mentioning

confidence: 99%

An experimental investigation of mixed-mode fracture

Mahajan

Ravi‐Chandar

1989

Int J Fract

View full text Add to dashboard Cite

In this paper, mixed-mode fracture is investigated experimentally. In the first part, critical conditions for initiation of crack growth are explored. The method of caustics was used in conjunction with a high speed video system to determine critical stress intensity factors at initiation of crack growth. It was found that the maximum tangential stress criterion originally proposed by Erdogan and Sih [1] was the best criterion in terms of predictive capability. Polymethylmethacrylate and Homalite-100 were used in the experiments and Homalite-100 was found to exhibit significant rate dependence. In the second part, crack growth initiated under mixed-mode loading is addressed. It is shown that subsequent slow crack growth in PMMA is under pure mode-1 conditions.

show abstract

Experimental study of the T-criterion in ductile fractures

Cited by 76 publications

References 9 publications

Mixed-mode fatigue crack propagation in thin T-sections under plane stress

Mixed-mode fatigue crack propagation in thin T-sections under plane stress

Fatigue Crack Growth Under Biaxial Loading

An experimental investigation of mixed-mode fracture

Contact Info

Product

Resources

About