Predicting failure of cracked aluminum plates with one-sided composite patch

Hart, Daniel C.; Bruck, Hugh A.

doi:10.1007/s10704-020-00509-4

Cited by 3 publications

(1 citation statement)

References 15 publications

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“…It should be noted that FEA modelling (Han et al, 2014, Khor et al, 2018, Benamara et al, 2016, Wang et al, 2000, Moore and Khor, 2018 and imaging techniques (Budzik andJensen, 2016, Wang andShuai, 2012), such as digital image correlation (Quino et al, 2020, Yates et al, 2010, Hart and Bruck, 2021, have been successfully applied on the analysis of cracks. However, these approaches would require detailed understanding of the material properties, loading condition and boundary conditions.…”

Section: Discussionmentioning

confidence: 99%

Finite element analysis on grey cast iron assets: a case study on penstocks in the wastewater system

Khor

Farrow

Mulheron

et al. 2022

Infrastructure Asset Management

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Penstocks have been used in the water industry for flow control since the Victorian expansion and consolidation of clean and waste water networks. However, the Victorians were the first to use grey cast iron (GCI) castings to manufacture large scale penstocks. Most of these ageing assets are still in operation, however engineering assessments are necessary to determine a structure’s fitness-for-service. Even today, penstocks in the sewer system tend to be made from GCI, due to ease of manufacturing, resistance to corrosion and cost. One characteristic property of grey cast iron is the graphite flake structure in the material, contributing to its low toughness, inconsistency in material strength and brittle behaviour, despite exhibiting slight hardening properties. Finite element analysis (FEA), is a numerical method which allows the analysis of complex structures by splitting it into finite parts and solving them with a computer processor. Despite the versatility of FEA, appropriate considerations and assumptions are necessary due to the difficulty to obtain data from inspection and unique material behaviour of GCI. The article shows concerns for an analysis of GCI penstocks using FEA, which extends into the application of fracture mechanics approaches for defect assessments.

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Section: Discussionmentioning

confidence: 99%

Finite element analysis on grey cast iron assets: a case study on penstocks in the wastewater system

Khor

Farrow

Mulheron

et al. 2022

Infrastructure Asset Management

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The J-area integral applied in peridynamics

Stenström

Eriksson

2021

Int J Fract

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The J-integral is in its original formulation expressed as a contour integral. The contour formulation was, however, found cumbersome early on to apply in the finite element analysis, for which method the more directly applicable J-area integral formulation was later developed. In a previous study, we expressed the J-contour integral as a function of displacements only, to make the integral directly applicable in peridynamics (Stenström and Eriksson in Int J Fract 216:173–183, 2019). In this article we extend the work to include the J-area integral by deriving it as a function of displacements only, to obtain the alternative method of calculating the J-integral in peridynamics as well. The properties of the area formulation are then compared with those of the contour formulation, using an exact analytical solution for an infinite plate with a central crack in Mode I loading. The results show that the J-area integral is less sensitive to local disturbances compared to the contour counterpart. However, peridynamic implementation is straightforward and of similar scope for both formulations. In addition, discretization, effects of boundaries, both crack surfaces and other boundaries, and integration contour corners in peridynamics are considered.

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The essential work of fracture in peridynamics

et al. 2023

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In this work, the essential work of fracture (EWF) method is introduced for a peridynamic (PD) material model to characterize fracture toughness of ductile materials. First, an analytical derivation for the path-independence of the PD J-integral is provided. Thereafter, the classical J-integral and PD J-integral are computed on a number of analytical crack problems, for subsequent investigation on how it performs under large scale yielding of thin sheets. To represent a highly nonlinear elastic behavior, a new adaptive bond stiffness calibration and a modified bond-damage model with gradual softening are proposed. The model is employed for two different materials: a lower-ductility bainitic-martensitic steel and a higher-ductility bainitic steel. Up to the start of the softening phase, the PD model recovers the experimentally obtained stress–strain response of both materials. Due to the high failure sensitivity on the presence of defects for the lower-ductility material, the PD model could not recover the experimentally obtained EWF values. For the higher-ductility bainitic material, the PD model was able to match very well the experimentally obtained EWF values. Moreover, the J-integral value obtained from the PD model, at the absolute maximum specimen load, matched the corresponding EWF value.

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Predicting failure of cracked aluminum plates with one-sided composite patch

Cited by 3 publications

References 15 publications

Finite element analysis on grey cast iron assets: a case study on penstocks in the wastewater system

Finite element analysis on grey cast iron assets: a case study on penstocks in the wastewater system

The J-area integral applied in peridynamics

The essential work of fracture in peridynamics

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