Prediction of fatigue life in aluminium alloy (AA7050-T7451) structures in the presence of multiple artificial short cracks

Tan, James; Chen, Bernard

doi:10.1016/j.tafmec.2015.06.001

Cited by 24 publications

(25 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Subsequent studies have built on this finding, that is, on , to the extent that it is now known that the growth of cracks from small naturally occurring material discontinuities can be approximated by the Hartman–Schijve variant of the NASGRO equation for a long crack, that is, Eq. , with the constants D and A obtained from tests on long cracks using a reduced value of the threshold term Δ K thr . Indeed, as explained in , for a given size crack, the scatter in the da/dN versus Δ K curves can often be captured by allowing for small changes in the term Δ K thr .…”

Section: Nasgro Representation Of Short Crack Growth In 4340 Steelmentioning

confidence: 98%

“…(4), with the constants D and A obtained from tests on long cracks using a reduced value of the threshold term ΔK thr . 7, [24][25][26]39 Indeed, as explained in 7,24,25 , for a given size crack, the scatter in the da/dN versus ΔK curves can often be captured by allowing for small changes in the term ΔK thr . To illustrate this, Jones 7 considered the paper by Virkler, Hillberry and Goel 40 that is recognised as being one of the definitive studies that illustrates the variability in crack growth rates.…”

Section: N a S G R O R E P R E S E N T A T I O N O F S H O R T C R A mentioning

confidence: 99%

See 1 more Smart Citation

Crack growth in a naturally corroded bridge steel

Ali

Peng

Jones

et al. 2016

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

This paper summarises the findings of an international collaborative programme that focuses on the problem of the growth of cracks that arise from natural corrosion in bridge steels. The experimental data presented in this paper confirm that the bridge steel da/dN versus ΔK relationship is similar to that seen by the high‐strength aerospace steels D6ac and 4340. It is then shown that the methodology developed to predict the growth of small naturally occurring cracks in aerospace materials can also be used to compute the growth of cracks that arise because of natural corrosion in bridge steels.

show abstract

Section: Nasgro Representation Of Short Crack Growth In 4340 Steelmentioning

confidence: 98%

Section: N a S G R O R E P R E S E N T A T I O N O F S H O R T C R A mentioning

confidence: 99%

Crack growth in a naturally corroded bridge steel

Ali

Peng

Jones

et al. 2016

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

show abstract

“…With experimental data for crack growth rates and numerical results for stress intensity factors, the parameters c and m in the Paris equation can be modified. For the double parallel crack propagation, the modified c' and m' are given by Equations (9) and (10) where K R is calculated by Equation (7) or Equation (8). Equations (9) and (10) are obtained by the least square method according to the fitting curves in Figure 13a.…”

Section: Simplification Of Double Cracks and Discussionmentioning

confidence: 99%

“…For the double parallel crack propagation, the modified c' and m' are given by Equations (9) and (10) where K R is calculated by Equation (7) or Equation (8). Equations (9) and (10) are obtained by the least square method according to the fitting curves in Figure 13a. Figure 15 shows the modification results where points are experimental data of the dominant crack propagation, the color curves are fitted from these data and the black curves are plotted from the Paris equations which are modified by Equations (9) and (10).…”

Section: Simplification Of Double Cracks and Discussionmentioning

confidence: 99%

“…However, for the multiple cracks, the driving force, for example, the stress intensity factor (SIF), should be affected by the interactions between multiple cracks [7]. Neglect of crack interactions will lead to an inaccurate estimate of fatigue levels of engineering components [8][9][10]. Hence, it is of great importance to investigate the interactions between multiple cracks.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Study of the Shielding Interactions between Double Cracks on Crack Growth Behaviors under Fatigue Loading

Han

Qian

2020

Metals

View full text Add to dashboard Cite

In this paper, the interactions between double cracks with a co-bisector-line were investigated theoretically and experimentally. Fatigue crack growth tests of specimens with a single crack or double cracks were carried out to measure the crack growth rates, and finite element calculations were performed to obtain the stress intensity factors at crack tips. It was found that when the double cracks are in co-bisector-line, they present shielding interactions which reduce the stress intensity factors at crack tips as well as the crack growth rates. By modifying the stress intensity factors and the Paris equation considering the shielding interactions, a new simplification method was proposed to simplify the double cracks into a single crack with the same crack growth rates.

show abstract

Crack tip shielding and size effect related to parallel edge cracks under uniaxial tensile loading

Ferrian,

Cornetti,

Sapora

et al. 2024

Int J Fract

View full text Add to dashboard Cite

The present work aims at investigating crack shielding and size effect related to a cracked slab under tensile loading. For this purpose, experimental tests are carried out on PMMA cracked samples. Three different geometries are taken into account, presenting one, two or three parallel edge cracks, and assuming their distance equal to their initial length. Results are interpreted through the coupled stress and energy criterion of Finite Fracture Mechanics (FFM). The approach is implemented numerically, and parametric finite element analyses are carried out to evaluate the normal stress field and the stress intensity factor for each configuration. It is found that asymmetric crack propagation has to be preferred according to the energy balance. The matching between FFM failure predictions and experimental data reveals to be satisfactory.

show abstract

Prediction of fatigue life in aluminium alloy (AA7050-T7451) structures in the presence of multiple artificial short cracks

Cited by 24 publications

References 40 publications

Crack growth in a naturally corroded bridge steel

Crack growth in a naturally corroded bridge steel

Study of the Shielding Interactions between Double Cracks on Crack Growth Behaviors under Fatigue Loading

Crack tip shielding and size effect related to parallel edge cracks under uniaxial tensile loading

Contact Info

Product

Resources

About