On the finite width correction factor in prediction models for fatigue crack growth in built-up bonded structures

Wang, Wandong

doi:10.1016/j.engfracmech.2020.107156

Cited by 8 publications

(2 citation statements)

References 28 publications

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“…As a successful type of Fiber Metal Laminates (FMLs), GLARE (Glass fiber reinforced aluminum laminates) combines the advantages of both metal and composites (Mrzljak et al., 2020). GLARE laminates have been applied in some structural parts of civil aircrafts such as the fuselage skin of Airbus A380 (Guan et al., 2009) and the bulk cargo floor of Boeing B777 (Chai and Manikandan, 2014) due to good impact damage resistance, fatigue properties (Bhat and Patibandla, 2013), corrosion resistance (Wang, 2020), and anti-fire performance (Li et al., 2020). GLARE is fabricated by hot-pressing of alternate multi-layers of aluminum alloy sheet and unidirectional glass fiber/epoxy resin prepreg, the bonding strength of the interface determines interfacial stress transfer degree (Gonzalez-Canche et al., 2018) and has an obvious influence on the interlaminar as well as the comprehensive properties (Hu et al., 2020; Ji et al., 2020).…”

Section: Introductionmentioning

confidence: 99%

Short beam shear damage analysis of GLARE laminates based on digital image correlation and finite element analysis

Chen

Yang

Wang

et al. 2021

International Journal of Damage Mechanics

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The short beam shear performance of GLARE 3A-3/2 laminates with adhesive layers was investigated by combining the short beam test and the digital image correlation technique. The failure behavior was further analyzed based on finite element simulation and micro failure morphology. The results show an 8% and 58% difference in the short beam strength and bending displacement at failure of laminates along two orthogonal directions; The damage behavior of laminates is determined by the bottom unidirectional glass fiber reinforced plastic (GFRP) layers. The two typical failure modes are matrix and fiber fracture in the GFRP layer caused by local bending deformation, and interlaminar delamination between GFRP layers; The distribution of surface strain [Formula: see text] indicates the damage initiation and evolution process. The simulation result of the finite element model established in ABAQUS/Explicit shows consistency with digital image correlation analysis, which provides an effective method to predict the damage behavior of specimens with different ply structures.

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Section: Introductionmentioning

confidence: 99%

Short beam shear damage analysis of GLARE laminates based on digital image correlation and finite element analysis

Chen

Yang

Wang

et al. 2021

International Journal of Damage Mechanics

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“…blunt crack), researchers are working on correction factors to account for the deviations that result from linear elastic fracture mechanics (LEFM) predictions. 1 Although literature is abundant on the use of finite element method to predict SIF, 2 most work focused on comparing finite element predictions and those from LEFM on sharp crack, and often not complemented by experimental observations. Also, some modelling techniques require manual node adjustment (i.e.…”

Section: Introductionmentioning

confidence: 99%

Modelling mode I failure at crack tip with verifications using digital image correlation

2021

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Background: Linear elastic fracture mechanics (LEFM) applies to sharp cracks, although crack sites such as holes and slots are often blunt cracks with nonzero widths. The advancement in finite element method (FEM) has enabled the calculation of stress intensity factor (SIF) for unstable crack growth prediction, regardless of crack shape and size, but the calculations often differ from contour to contour. Hence, the purpose of this work is to determine if SIFs computed using commercial FEM have experimentally verifiable advantages over the traditional stress-based modelling approaches in predicting Mode I brittle failure at blunt crack tip. Methods: Experiments and simulations were conducted on brittle Poly(methyl methacrylate) (PMMA) plastic to compare the actual and predicted strain fields and SIFs at crack tip, and the critical force at which unstable crack growth initiates. A centrally straight cracked Brazilian disc made of PMMA was subjected to purely Mode I fracture. Its strain fields were measured from deformed speckle patterns using digital image correlation software. The same disc was modelled using plane stress model in FEM. By applying the critical force, SIFs were then computed using ANSYS pre-meshed crack method at different contours away from the crack tip. The effects of element type, mesh size and crack width on the simulated SIFs were investigated. Results: It was found that the experimental critical load agreed well with LEFM prediction based on PMMA fracture toughness in published literature. Disc failure happened at the first sign of tensile yield at the crack tip in the finite element model with a triangle mesh. Digital image correlation clearly shows the occurrence of unstable crack growth at critical force. It also shows comparable far field strain responses to the FEM model. Conclusions: The computed SIFs were inconsistent, and their usefulness in predicting unstable crack growth requires further investigation.

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DIC-based constant amplitude and two-block loading fatigue life prediction of open hole GLARE laminate

Chen

Yang

Qiu

et al. 2023

Engineering Fracture Mechanics

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On the finite width correction factor in prediction models for fatigue crack growth in built-up bonded structures

Cited by 8 publications

References 28 publications

Short beam shear damage analysis of GLARE laminates based on digital image correlation and finite element analysis

Short beam shear damage analysis of GLARE laminates based on digital image correlation and finite element analysis

Modelling mode I failure at crack tip with verifications using digital image correlation

DIC-based constant amplitude and two-block loading fatigue life prediction of open hole GLARE laminate

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