Stress Analysis and Failure Properties of Carbon-Fibre-Reinforced-Plastic/Steel Double-Lap Joints

Adams, Robert D.; Atkins, R. W.; Harris, J. A.; Kinloch, A. J.

doi:10.1080/00218468608073238

Cited by 185 publications

(52 citation statements)

References 5 publications

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“…The criterion used varies between maximum values of stress [104][105][106], strain [83,105], or plastic energy density [107]. However, it is difficult to use maximum stress or strain criteria due to the bi-material singularities inherent in a bonded joint (Fig.…”

Section: Continuum Mechanics Approachmentioning

confidence: 99%

Adhesively bonded joints in composite materials: An overview

Banea

Silva

2009

Proceedings of the Institution of Mechanical Engineers, Part L:

469

330

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A review of the investigations that have been made on adhesively bonded joints of fibre-reinforced plastic (FRP) composite structures (single skin and sandwich construction) is presented. The effects of surface preparation, joint configuration, adhesive properties, and environmental factors on the joint behaviour are described briefly for adhesively bonded FRP composite structures. The analytical and numerical methods of stress analysis required before failure prediction are discussed. The numerical approaches cover both linear and non-linear models. Several methods that have been used to predict failure in bonded joints are described. There is no general agreement about the method that should be used to predict failure since the failure strength and modes are different according to the various bonding methods and parameters, but progressive damage models are quite promising since important aspects of the joint behaviour can be modelled by using this approach. However, a lack of reliable failure criteria still exists, limiting in this way a more widespread application of adhesively bonded joints in principal load-bearing structural applications. An accurate strength prediction of the adhesively bonded joints is essential to decrease the amount of expensive testing at the design stage.

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Section: Continuum Mechanics Approachmentioning

confidence: 99%

Adhesively bonded joints in composite materials: An overview

Banea

Silva

2009

Proceedings of the Institution of Mechanical Engineers, Part L:

469

330

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“…These include; maximum stress [5,6], maximum strain [7,8], plastic yielding, maximum principal stress or strain, and plastic energy density [9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Modelling Damage and Failure in Adhesive Joints Using A Combined XFEM-Cohesive Element Methodology

Mubashar

Ashcroft

Crocombe

2014

The Journal of Adhesion

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In recent years, cohesive elements based on the cohesive zone model (CZM) have been increasingly used within finite element analyses of adhesively bonded joints to predict failure. The cohesive element approach has advantages over fracture mechanics methods in that an initial crack doesn't have to be incorporated within the model. It is also capable of modelling crack propagation and representing material damage in a process zone ahead of the crack tip. However, the cohesive element approach requires the placement of special elements along the crack path and is, hence, less suited to situations where the exact crack path is not known a priori. The extended finite element method (XFEM) can be used to represent cracking within a finite element and hence removes the requirement to define crack paths or have an initial crack in the structure. In this paper a hybrid XFEM-cohesive element approach is used to model cracking in the fillet area using XFEM where the crack path is not known and then using cohesive elements to model crack and damage progression along the interface. The approach is applied to the case of an aluminium-epoxy single lap joint and is shown to be highly effective.

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“…Так, в работе [13] повышение точности вычислений вблизи точек рез-кого возрастания напряжений достигается путем введения в МКЭ-расчет специальных гибрид-элементов. Авторы статьи [14] проблему повышения точности расчетов при исследовании напряжений в окре-стности особых точек в клеевых прослойках решают путем локального сглаживания возможных геометрических концентраторов напряжений.…”

Section: Introductionunclassified

Study of the stress state in composite plate near the connecting line edge depending on the thickness and material parameters of the connecting interlayer

Pestrenin¹,

Pestrenina²,

Landik³

et al. 2014

PNRPU Mechanics Bulletin

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Изучается напряженное состояние в окрестности особой точки пластинки, составленной из двух одинаковых элементов с помощью посредника, например клея, и находящейся в услови-ях плосконапряженного состояния.Целью исследования является выявление особенностей рассматриваемого типа задач механики деформируемого твердого тела и изучение влияния материальных свойств и толщины прослойки на концентрацию напряжений вблизи края линии соединения элементов пластинки (в особой точке).Проводится аналитическая оценка количества ограничений на параметры состояния в точке края линии соединения элемента пластинки и посредника. Устанавливается, что количе-ство независимых ограничений зависит от материальных свойств скрепляемых элементов и, как правило, избыточно (нестандартно). Стандартным количество заданных условий оказывается лишь в исключительных случаях при определенных сочетаниях материальных параметров скре-пляемых тел. Отвечающее такому случаю решение называется «опорным». В рассматриваемой задаче -это однородное напряженное и кусочно-однородное деформированное состояние. Ре-шения задач с нестандартно заданными условиями в особой точке строятся вблизи опорного решения, для чего применяется итерационный численно-аналитический метод, основанный на минимизации невязок выполнения всех краевых условий в окрестности особой точки.Выявлены закономерности, характеризующие изменение напряженного состояния вблизи особой точки в элементах составной пластинки в зависимости от толщины посредника и его ма-териальных свойств. Зависимость коэффициента концентрации напряжений от толщины про-слойки практически отсутствует, от материальных свойств -оказывается существенной. Наи-большее значение коэффициент концентрации принимает в более жестком материале.Ключевые слова: плосконапряженное состояние, особая точка, концентрация напряже-ний, составные элементы конструкции, итерационный метод. В.М. Пестренин, И.В. Пестренина, Л.В. Ландик, Е.А. Полянина 154 V.M. Pestrenin, I.V. Pestrenina, L.V. Landik, E.A. PolyaninaPerm State National Research University, Perm, Russian Federation STUDY OF THE STRESS STATE IN COMPOSITE PLATE NEAR THE CONNECTING LINE EDGE DEPENDING ON THE THICKNESS AND MATERIAL PARAMETERS OF THE CONNECTING INTERLAYERThe plane-stress state in the vicinity of singular point, in a plate composed of two identical elements with interlayer such as glue is studied.The purpose of this study is determining characteristics of this solid mechanics problem and influence of material properties and interlayer thickness on stress concentration near the edge of the combining the elements (at the singular point ).Analytical estimation of the restrictions count on the state parameters at the line edge of junction plate element and interlayer is conducted. It is shown that the count of independent restrictions depends on the material properties of the plate elements and is usually redundant (non-standard). Standard restrictions count is only an exceptional case, when certain combinations of plate elements material parameters take place. In this particul...

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Stress Analysis and Failure Properties of Carbon-Fibre-Reinforced-Plastic/Steel Double-Lap Joints

Cited by 185 publications

References 5 publications

Adhesively bonded joints in composite materials: An overview

Adhesively bonded joints in composite materials: An overview

Modelling Damage and Failure in Adhesive Joints Using A Combined XFEM-Cohesive Element Methodology

Study of the stress state in composite plate near the connecting line edge depending on the thickness and material parameters of the connecting interlayer

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