Probabilistic Fracture Mechanics for Analysis of Longitudinal Cracks in Pipes Under Internal Pressure

Mechab, Boubaker; Chioukh, Nadji; Sérier, B.

doi:10.1007/s11668-018-0564-8

Cited by 9 publications

(4 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…he J-integral is an appropriate fracture parameter that describes the crack-tip stress and strain fields adequately when there are no constraint effects [24]. Probabilistic models have also been developed to estimate various response statistics and reliability [25]. Using FEM, one can calculate J for any crack geometry and load conditions.…”

Section: Random Parameters and Fracture Responsementioning

confidence: 99%

Probabilistic Elastic-plastic Fracture Mechanics Analysis of Propagation of Cracks in Pipes under Internal Pressure

Mechab

Medjahdi

Salem

et al. 2020

Frattura Ed Integrità Strutturale

Self Cite

View full text Add to dashboard Cite

This study presents a three dimensional finite element method analysis of semi-elliptical surface cracks in pipes under internal pressure load. In the elastic–plastic case, estimates of the J-integral are presented for various ratios including crack depth to pipe thickness (a/t) and strain hardening index in the (R-O) Ramberg-Osgood (n). Finally, failure probability is accessed by a statistical analysis for uncertainties in loads and material properties, and structural reliability and crack size. The Monte Carlo method is used to predict the distribution function of the mechanical response. According to the obtained results, we note that the stress variation and the crack size are important factors influencing on the distribution function of (J/Je).

show abstract

Section: Random Parameters and Fracture Responsementioning

confidence: 99%

Probabilistic Elastic-plastic Fracture Mechanics Analysis of Propagation of Cracks in Pipes under Internal Pressure

Mechab

Medjahdi

Salem

et al. 2020

Frattura Ed Integrità Strutturale

Self Cite

View full text Add to dashboard Cite

show abstract

“…The cumulative effects IJSI 15,1 of such damage can ultimately result in the complete failure of either the individual component or the entire structure, contingent on the specific material's critical damage threshold (Mechab et al, 2014). To elucidate crack propagation, the principles of fracture mechanics theory are employed, making it a pertinent subject within the realm of mechanical integrity analysis (Mechab et al, 2018(Mechab et al, , 2020.…”

Section: Introductionmentioning

confidence: 99%

New investigation of delamination using the VCCT method to predict the damage in bonded composite repair plates subjected to tensile load

Talbi,

Salem,

Mechab

et al. 2024

IJSI

Self Cite

View full text Add to dashboard Cite

PurposeThis study provides an analysis of patch repair for cracked aircraft structures. Delamination is a type of damage that affects the patch's behavior. The purpose of this study is to assess the influence of delamination on repair performance.Design/methodology/approachAn analytical and numerical study using the finite element method was conducted for a cracked plate repaired with a patch containing a pre-existing delamination defect. The method for defining the contact pair surfaces and modeling the delamination interaction within the patch interface is specified using the virtual crack closure technique (VCCT) approach.FindingsThe efficiency of the repair is measured in terms of the J-integral. The effects of delamination initiation, mechanical loading, crack length and patch stacking sequences are presented. It is noted that in mode I, delamination propagation is only significant at node A. The numerical results are in good agreement with those of the analytical solution found in the literature. It is observed that the patch's behavior is strongly dependent on loading, crack size and stacking sequences in terms of reducing the structure's lifespan, especially in the presence of delamination.Originality/valueThe numerical modeling presented by the VCCT approach is highly valuable for studying delamination evolution. The influence of loading, crack size and stacking sequences on repair performance is discussed in this work.

show abstract

“…Crack propagation can occur in many structural components of plates and they can also be the cause of premature damage of aircraft. The fracture prediction and the reliability of such structure systems in various practical applications are of primary importance given their impact on the economic plan and security (Mechab et al 2020;Mechab et al 2018;Mechab et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Numerical and Analytical Prediction of the Propagation of Delamination of Bonded Composite Repair Plates Under Mechanical Loading

Talbi,

Salem,

Mechab

et al. 2023

JSSCM

View full text Add to dashboard Cite

This study presents a numerical and analytical prediction of delamination of a repaired joint due to a defect in the composite under tensile loading. The three-dimensional finite element method is used to predict the delamination of a repaired plate with the VCCT method. The effects of the position of the delamination, percentage of the delaminated area, thickness and properties of the patch are presented. It can be noted that the propagation of delamination is significant only at node A and the analyzed model delaminated in mode I. The numerical results are in good agreement compared with the analytical solution found in the literature. It can be seen that the stiffness of the reinforcement material is strongly dependent on the mechanical properties of the patch interface. These results make it possible to choose the carbon/epoxy patch for the repair even if the graphite/epoxy has a high modulus of elasticity. The thickness and the mechanical properties parameter have a significant effect on increasing the durability of the structure.

show abstract

Probabilistic Fracture Mechanics for Analysis of Longitudinal Cracks in Pipes Under Internal Pressure

Cited by 9 publications

References 20 publications

Probabilistic Elastic-plastic Fracture Mechanics Analysis of Propagation of Cracks in Pipes under Internal Pressure

Probabilistic Elastic-plastic Fracture Mechanics Analysis of Propagation of Cracks in Pipes under Internal Pressure

New investigation of delamination using the VCCT method to predict the damage in bonded composite repair plates subjected to tensile load

Numerical and Analytical Prediction of the Propagation of Delamination of Bonded Composite Repair Plates Under Mechanical Loading

Contact Info

Product

Resources

About