Strength prediction of tubular composite adhesive joints under torsion

Oh, Je Hoon

doi:10.1016/j.compscitech.2006.09.021

Cited by 29 publications

(14 citation statements)

References 20 publications

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“…Finite element results are good supplements to analytical research. A finite element analysis was used to calculate the residual thermal stresses generated by cooling down from the adhesive cure temperature and a nonlinear analysis incorporating the nonlinear adhesive behavior was performed [9]. Taheri et al [10][11][12][13] developed a simple method for assessing the behavior of adhesively bonded tubular joints under torsion, based on a parametric study conducted by 2D and 3D finite element analysis.…”

Section: Mathematical Problems In Engineeringmentioning

confidence: 99%

Full Debonding Process of Adhesively Bonded Composite and Metallic Pipe Joints under Torsion

Han

Yuan

2016

Mathematical Problems in Engineering

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Bonded joints are very common in many pipeline systems, in which the bond behavior of the joint interface is of crucial importance. This paper presents two analytical solutions for the debonding process of a pipe joint under torsion, assuming that the bond interface follows either an exponential softening bond-slip law or a simplified bilinear model. The solutions are general, applicable to composites and metallic and indeed other pipes. Based on the analytical solutions, the influences of the bond length and stiffness on the torque-displacement curve and ultimate load are investigated. The solutions can be used to explain the stress transfer mechanism, the interface crack propagation, and the ductility of the joint.

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Section: Mathematical Problems In Engineeringmentioning

confidence: 99%

Full Debonding Process of Adhesively Bonded Composite and Metallic Pipe Joints under Torsion

Han

Yuan

2016

Mathematical Problems in Engineering

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“…They compared their closed-form solution with the finite element solution. Oh [2][3][4] conducted a series of investigations to predict the strength of adhesively bonded tubular joints. His results proved that both the failure mode and joint strength were strongly dependent on the stacking sequence and adhesive thickness as well as on the adherend material.…”

Section: Introductionmentioning

confidence: 99%

Interlaminar Stresses at the Delamination Fronts in Tubular Adhesive Joints with Delaminated Composite Adherends

Esmaeel

Taheri‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬

2011

Journal of Adhesion Science and Technology

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The use of composite materials has been extensively increasing in the recent decades, mainly due to their high strength and stiffness to weight ratios, as well as their non-corrosive attribute. Adhesive joints are used effectively to join composites to composites or to dissimilar materials. Components made of composites may contain some defects in the form of delaminations that may adversely affect their overall behavior and response when subjected to different loading systems. Interlaminar stresses (including out-of-plane stresses) are caused by the mismatch in material properties, especially in Poisson's ratio and the so-called 'coefficient of mutual influence' (between adjacent layers). The goal of this paper is to evaluate the interlaminar stresses that exist at the delamination fronts in a composite pipe, hosting a small delamination, adhesively bonded to an aluminum pipe. The aim is also to study the effect of various parameters (such as delamination length, depth, fiber orientation angles, and stacking sequence) that influence the performance, using the finite element method. The system is subjected to a torsional moment, which can be considered as a critical loading condition in tubular adhesive joints. Results of the study provide valuable information about the behavior of adhesive joints with delaminated composite adherends, and reveal the nature and distribution of interlaminar stresses along various delaminated fronts under torsional moments.

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“…Note that the second phenomenon would be absent in a torsion loading state. In a series of papers, Oh [3][4][5] presented strength prediction of tubular adhesive joints subjected to torsion using FEM. He estimated joint failure based on three failure criteria: interfacial failure, adhesive bulk failure, and adherend failure.…”

Section: Introductionmentioning

confidence: 99%

Stress Analysis of Tubular Adhesive Joints with Delaminated Adherend

Esmaeel

Taheri‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬

2009

Journal of Adhesion Science and Technology

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The use of adhesive joints is becoming increasingly important in aerospace, automotive and other industries where the use of traditional fasteners is discouraged. When using composite adherends, the use of adhesively bonded joints is preferable rather than the traditional bolts and other types of fasteners, because they do not require holes, thereby removing the problems of stress concentrations around the holes. However, when using an adhesively bonded joint, there will be concentrations of the distributions of shear and peel stresses within the adhesive layer which should be controlled effectively. Therefore, the investigation of such stress variation has attracted many researchers. The aforementioned stress distributions become more complicated if the composite adherend contains a pre-existing delamination. Delamination is one of the most common failure modes in laminated composite materials; it can occur due to sudden impact by an external object, during the manufacturing process (e.g., during the filament winding process), or as a result of excessive stresses due to an applied load. It is clear that the existence of a delamination in any composite structure causes a reduction in its stiffness and in some critical situations, it may cause complete failure. This paper investigates the effect of delamination on the structural response of an adhesively bonded tubular joint with composite and aluminum adherends. The finite element method, using the commercial package ABAQUS, is used to conduct a parametric investigation. The effects of the delamination's spatial location, length, width, and the applied loading are studied. Results provide interesting insight (not necessarily intuitive) into the effect of an interlayer delamination on the stress distribution within the adhesive. Figure 15. Distribution of (a) peel stress along the overlap length and (b) shear stress along the overlap length, as a function of the delamination length L 2 , for the full annular delamination model (applied torsional moment = 100 N m, and aluminum/glass-epoxy adherends).

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Strength prediction of tubular composite adhesive joints under torsion

Cited by 29 publications

References 20 publications

Full Debonding Process of Adhesively Bonded Composite and Metallic Pipe Joints under Torsion

Full Debonding Process of Adhesively Bonded Composite and Metallic Pipe Joints under Torsion

Interlaminar Stresses at the Delamination Fronts in Tubular Adhesive Joints with Delaminated Composite Adherends

Stress Analysis of Tubular Adhesive Joints with Delaminated Adherend

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