Essential work of fracture assessment for thin aluminium strips using finite element analysis

Abdellah, Mohammed Y.

doi:10.1016/j.engfracmech.2017.04.042

Cited by 27 publications

(13 citation statements)

References 36 publications

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“…It can be seen that for an elastic XFEM model for a stationary crack, the mesh refinement has less influence. The convergence of the mesh has been studied in many papers [4,33,63] and is not significantly affected in the simulation with XFEM, which is a great advantage. Therefore, it was not necessary to investigate the accuracy of the convergence of the mesh in a complex way.…”

Section: Resultsmentioning

confidence: 99%

“…A numerical model proposed by Abdellah [33] used two finite element models, one called the extended finite element method based on a meshless free and an enhancement function, and another based on the J-integral method to correlate the relationship between the mode I fracture toughness (J IC ) and the EWF of ductile thin aluminium plates. Cohesive zone models, where a fictitious crack was introduced through the model, were used early in combination with FEMs, such as the cohesive element [34][35][36][37] and cohesive surface [36,38,39].…”

Section: Introductionmentioning

confidence: 99%

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A Comparative Study to Evaluate the Essential Work of Fracture to Measure the Fracture Toughness of Quasi-Brittle Material

et al. 2022

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In the present work, three different woven composite laminates were fabricated using the hand lay-up method. The woven reinforcement fibres were carbon fibres (CFRP), glass fibres (GFRP-W) and (GFRP-R) in combination with epoxy resin. Then, the central notch specimen tensile test (CNT) was used to measure the fracture toughness and the corresponding surface release energy (GIC). Then, the data were compared with the essential work of fracture (we) values based on the stored energy of the body to obtain a new standard fracture toughness test for composite laminates using relatively simple techniques. In addition to an extended finite element model, XFEM was implemented over a central notch specimen geometry to obtain a satisfactory validation of the essential work of fracture concepts. Therefore, the average values of (GIC) were measured with CNT specimens 25.15 kJ/m2, 32.5 kJ/m2 and 20.22 kJ/m2 for CFRP, GFRP-W and GFRP-R, respectively. The data are very close as the percentage error for the surface release energy measured by the two methods was 0.83, 4.6 and 5.16 for carbon, glass and random fibre composite laminates, respectively. The data for the fracture toughness of XFEM are also very close. The percentage error is 4.6, 5.25 and 2.95 for carbon, glass and random fibre composite laminates, respectively. Therefore, the fundamental work of the fracture concept is highly recommended as a fracture toughness test for composite laminates or quasi-brittle Material.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Comparative Study to Evaluate the Essential Work of Fracture to Measure the Fracture Toughness of Quasi-Brittle Material

et al. 2022

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“…Materials with higher fracture toughness values obtained from the EWF test showed better crash resistance. Several researchers simulated the EWF test in FEM analysis to find the influence of various parameters on fracture toughness [19][20][21]. Some researchers have even attempted to compare the specific essential work of fracture w e with critical J c integral [22].…”

Section: Introductionmentioning

confidence: 99%

Fracture Toughness Analysis of Automotive-Grade Dual-Phase Steel Using Essential Work of Fracture (EWF) Method

Kumar

Schmidová

Konopík

et al. 2020

Metals

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Fracture toughness determination of dual-phase DP450 steel using the essential work of fracture (EWF) methodology is the major focus of this research work. The EWF method is used for the determination of fracture toughness of thin sheets in a plane stress dominant condition. The EWF method is discussed in detail with the help of DP450 steel experimental results. Double edge notched tension (DENT) specimens with fatigue pre-crack and without fatigue crack (notched) have been used for testing. Specific essential work of fracture (we), crack tip opening displacement (δce) and crack tip opening angle (ψe) parameters were used for the comparative analysis. High-intensity laser beam cutting technology was used for the preparation of notches. Fracture toughness values of fatigue pre-cracked and notched samples were compared. The effect of notch tip radius and fatigue crack on the fracture toughness values were analysed. Digital image correlation (DIC) technology was used for the identification of local strain distribution and validation of the methodology. Fractured surfaces were examined by a scanning electron microscope (SEM) to analyse the fracture morphology and stress state.

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“…He also created a straightforward finite element numerical model using the essential work of fracture (EWF) to forecast the parameters of EWF .Although the sample was measured in millimetres, the findings of the experiment and the suggested model were in good agreement. [7]. According to Betegon et al [8] investigation on the mechanical damage of the 5754-H111 aluminum alloy, microcavities or microvoids are mostly responsible for damage and fracture.…”

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confidence: 99%

Influence Parameters on the Essential Work of Fracture of 5754-H111 Aluminum Alloy Plate: Comparative Study

Kamal

Ghazaly

Abdellah

et al. 2023

SVU-International Journal of Engineering Sciences and Applicati

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Aluminum alloy 5754 is a medium strength alloy with excellent corrosion resistance especially to seawater and industrially polluted atmospheres. Aluminum alloy 5754-H111 shows good cold formability, high fatigue strength and fair machinability. The present work aims to develop the test specimen to obtain the Essential Work of Fracture EWF which based on the Ligament yielding observed to occur at the peak of the load-displacement curve. It Follow this, necking and tearing occur in the softening region. The plastic zone, however, expands as a result of the non-essential work of fracture being dissipated in the tearing process after yielding. For studding the effect of stress raiser on Essential Work of Fracture three procedure applied, First at high test speed second with holes third at pre-stress .This work contributes to the overall goal to model fracture behavior and crack propagation .Investigation the adhesion properties by static tests concerned with stress lines concentrations on different material volume have been achieve in the obtained results .The EWF method achieved 273 KJ/m² for 5 mm thickness and 63 KJ/m² for 1.8 mm thickness these values. The strain ratetest achieved high value of EWF is measurement as 330 kJ/m²for 5mm and 28 kJ/m²for1.8 mm. By applying holes near the crack, the toughness increased which has been presented at the high value of EWF measurement compared without holes that the 5 mm specimen's thickness achieves 380 KJ/m² and for 1.8 mm thickness 110 KJ/m². On pre-stress 20% the EWF measured 250 kJ/m²for 5mm and 20 kJ/m²for1.8 mm and continues for pre-stress 30% EWF measured 230 kJ/m²for 5mm and 15 kJ/m²for1.8 mm. Also pre-stress 40%The EWF measured 210kJ/m²for 5mm and 10 kJ/m²for1.8 mm. For pre-stress 50% the EWF achieve lowest value measured as 190 kJ/m²for 5mm. The reduction of prestress values related to the broken average of atomic bonds due to increase the pre-load applied on the specimens.

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Essential work of fracture assessment for thin aluminium strips using finite element analysis

Cited by 27 publications

References 36 publications

A Comparative Study to Evaluate the Essential Work of Fracture to Measure the Fracture Toughness of Quasi-Brittle Material

A Comparative Study to Evaluate the Essential Work of Fracture to Measure the Fracture Toughness of Quasi-Brittle Material

Fracture Toughness Analysis of Automotive-Grade Dual-Phase Steel Using Essential Work of Fracture (EWF) Method

Influence Parameters on the Essential Work of Fracture of 5754-H111 Aluminum Alloy Plate: Comparative Study

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