Strength of single lap joints with artificial defects

Karachalios, Evangelos; Adams, Robert D.; Silva, Lucas F. M. da

doi:10.1016/j.ijadhadh.2013.04.009

Cited by 78 publications

(44 citation statements)

References 9 publications

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“…It is obvious that these types of defects are prime areas for degradation of the interface by introduction of water or oxygen. More recently, Karachalios et al (2013), Shishesaz and Bavi (2013), and Benchiha and Mandi (2015) analyzed the resistance of a bonded lap joint in the presence of defect by experimental, numerical and analytical methods. Their results showed that the resistance of the assembly was associated to the position and size of the defect.…”

Section: Effect Of Bonding Defect On the Failure Loadmentioning

confidence: 99%

Effects of the composite stacking sequence on the failure load of the single lap bonded joint

Mokhtari

Madani²,

Benzaama

et al. 2017

jtam

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Composite materials are widely used in aircraft structures, their relative rigidity/weight confers their advantage over metal structures, and the stacking sequence plays an important role for their use. The objective of this work is to analyze by the finite element method the mechanical behavior of a single lap joint of composite/composite type under a tensile load. In order to see the effects on the failure load, two basic parameters are taken into consideration; the stacking sequence of composite and thickness of each layer constituting the composite. Calculation of the failure load is made numerically with the ABAQUS code using the developed technique of VCCT (Virtual Crack Closure Technique) based on fracture mechanics. Finally, the influence of the bonding defect on the failure load is analyzed. The results clearly show the importance of optimizing fiber orientation and hence the stacking sequence for proper use of composite in bonded assemblies.

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Section: Effect Of Bonding Defect On the Failure Loadmentioning

confidence: 99%

Effects of the composite stacking sequence on the failure load of the single lap bonded joint

Mokhtari

Madani²,

Benzaama

et al. 2017

jtam

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“…In a comparison for defects between single-lap and double-lap joints they reported that the increase in stress is higher in single-lap joint than in double lap joints. Karachalios et al (2013), studied the effect of defects on the strength of a single-lap joint with various adherend and adhesive materials. Two different types of adhesive were studied with different degrees of ductility since the stress distribution along the overlap depends on the adhesive's capacity to deform plastically.…”

Section: Latin American Journal Of Solids and Structures 13 (2016) 33mentioning

confidence: 99%

Investigation on Void Effect on Shear Stress Field in Bonded Stepped-Lap Joint

Ghoddous

Shishehsaz

2016

Lat. Am. j. solids struct.

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In this paper, an adhesively-bonded stepped-lap joint suffering from a void within its adhesive layer is investigated. The void separates the layer into two sections. The joint is under tensile load and materials are isotropic and assumed to behave as linear elastic. Classical elasticity theory is used to determine shear stress distribution in the separated sections of adhesive layer along the overlap length. A set of differential equations was derived and solved by using appropriate boundary conditions. Finite element solution was used as the second method to verify the obtained results by analytical method. A two-dimensional model was created in ANSYS and meshed by PLANE elements. A good agreement was observed between two methods of solutions. Results revealed that the stepped-lap joint performed better in stress distribution with a void rather than single-lap and double-lap joints.

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“…De Moura et al [3] studied composite lap joint finding that the joint strength was not affected by a strip disbond located in the middle of the joint overlap. Karachalios et al investigated the effect of rectangular and circular disbond shapes located in the middle of the overlap on the static strength of steel joints [4]. In the case of small disbond, the shape of disbond does not affect the strength; as the disbond size gets bigger, more rapid decrease in the joint strength is found.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical study of process-induced defects and their effect on fatigue debonding in composite joints

Liu

Zhang

Lemanski

et al. 2019

International Journal of Fatigue

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Laboratory coupon joints for fatigue debonding tests usually have narrow width and a through-width initial disbond. However, realistic structural joints are much wider and may contain process-induced defects and accidental damage; both are much smaller than the joint width. Small and discrete damage may behave differently from the idealised through-width disbond crack. This has brought a question on whether the laboratory coupon joint can accurately represent the fatigue behaviour of wider structural joints. This paper presents an experimental and numerical study of fatigue behaviour of a wide bonded lap joint with a process-induced defect of semi-circular shape. Fatigue debonding propagation was monitored by ultrasound inspection. Fatigue life was predicted using a normalised strain energy release rate parameter calculated by finite element method, and the adhesive material fatigue crack growth rate data measured under single and mixed mode conditions. Simulation of processinduced defect and validation by experiments have brought a better understanding of fatigue debonding behaviour in wide joints containing realistic damage. Suggestions are given for fatigue fracture tests of bonded joints.

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Strength of single lap joints with artificial defects

Cited by 78 publications

References 9 publications

Effects of the composite stacking sequence on the failure load of the single lap bonded joint

Effects of the composite stacking sequence on the failure load of the single lap bonded joint

Investigation on Void Effect on Shear Stress Field in Bonded Stepped-Lap Joint

Experimental and numerical study of process-induced defects and their effect on fatigue debonding in composite joints

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