Two-Dimensional Thermal Stress Analysis in Adhesive Butt Joints Containing Hole Defects and Rigid Fillers in Adhesive Under Non-Uniform Temperature Field

Nakano, Yoshiaki; Katsuo, Masahide; Kawawaki, Masataka; Sawa, Toshiyuki

doi:10.1080/00218469808012238

Cited by 14 publications

(5 citation statements)

References 7 publications

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“…Nakano et al [10] analysed the thermal stresses occurring around the circular holes and rigid fillers inside the adhesive layer of a butt joint under a nonuniform temperature distribution, and found that the thermal stresses along the peripheries of the holes and fillers and the adhesiveadherend interface are affected by the size and location of the hole and fillers. Nagakawa et al [11] investigated the thermal stresses around the adhesive defects for a uniform temperature variation placing the adhesive defects near the adhesive free surfaces in an adhesive butt joint and showed that the thermal stresses near the defects in the centre of the adhesive layer were larger than those near the defects placed near the adhesive free surfaces.…”

Section: Introductionmentioning

confidence: 99%

Thermal and Geometrically Nonlinear Stress Analyses of an Adhesively Bonded Composite Tee Joint with Double Support

Apalak

Güneş

2004

Journal of Thermoplastic Composite Materials

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Carbon fiber reinforced plastics (CFRP) can be successfully joined to metal or composite structural components using the adhesive bonding technique [Semerdjiev, S. (1970). Metal to Metal Adhesive Bonding, Business Books Ltd., London.]. The stress and deformation fields occurring in the adhesive joints due to the thermal loads as well as the structural loads play an important role on the joint strength since the thermal and mechanical properties of the adhesive and adherends are different. Previous thermal stress analyses of the adhesive single-lap joints with simple geometries assumed a uniform temperature distribution through the adhesive joint, consequently predicted uniform thermal strain and stress distributions. In this study, the thermal stress analysis of an adhesively bonded tee joint with double support made of unidirectional CFRP was carried out for variable thermal loading conditions along its outer boundaries and different plate edge conditions. The large displacement and rotation effects were considered using the small strain-large displacement theory. The stress fields in the adhesive layer and the composite members of two tee joints bonded to a rigid base and a flexible plate were investigated. In the thermal analysis, a reference uniform temperature was attributed to all joint members for its stress free state, and air streams with different temperature and velocity were specified along the outer surfaces of the adhesive joint. In addition, the air streams were specified in the vertical or horizontal directions to the composite plates and adhesive layer. The consideration of convective and conductive heat transfer showed that nonuniform temperature distributions occurred in the adhesive tee joints. High heat fluxes took place along the free surfaces of the adhesive fillets at the free ends of the adhesive layers. Geometrical nonlinear stress analyses of two tee joints were carried out using the calculated temperature fields for two different plate edge conditions. Since the adhesive joints consist of materials with different thermal and structural properties, the thermal strains become incompatible along the adhesive layer–plate interfaces. Consequently, the stress concentrations occurred inside the adhesive fillets around the adhesive free ends, and in the regions near the adhesive layer–composite plate interfaces. The adhesive fillets, middle region of the horizontal plate, the elbow sections of the left and right supports appeared as most critical regions of the tee joints. In addition, the support length did not have similar effect of reducing the normal and shear stresses at these critical adhesive and adherend locations.

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Section: Introductionmentioning

confidence: 99%

Thermal and Geometrically Nonlinear Stress Analyses of an Adhesively Bonded Composite Tee Joint with Double Support

Apalak

Güneş

2004

Journal of Thermoplastic Composite Materials

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“…In these very dissimilar materials, the adhesion strength was found to fall proportionally to the increase in curing temperature and curing time. Nakano et al [23] studied butt joints with circular holes and rigid fillers. A parametric study on the location of these fillers and holes demonstrated that the thermal stresses could be controlled.…”

Section: Differential Thermal Expansionmentioning

confidence: 99%

“…The thermal expansion stresses can be of great importance not only when the adhesive joint is in service but also during the cooling phase from curing temperature. A large number of studies on the influence of thermal stresses in various types of adhesive joints are available [18][19][20][21][22][23][24]. Lee and Lee [18] introduced a model for tubular lap joints incorporating the magnitude of the residual thermal stresses induced by the fabrication process.…”

Section: Differential Thermal Expansionmentioning

confidence: 99%

Adhesive Joints for Low- and High-Temperature Use: An Overview

Marques

Silva

Banea

et al. 2014

The Journal of Adhesion

159

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This work presents a review of several investigations on the topic of adhesive bonding at high and low temperatures. Durability and strength at extreme temperatures have always been a major limitation of adhesives that, given their polymeric nature, exhibit substantial degradation at temperatures where other structural materials (such as metals for example) have minute changes in mechanical properties. However, due to the inherent advantages of bonding, there is a large and continued effort aiming to improve the temperature resistance of adhesive joints, and this effort has been spread among the various topics that are discussed in this review. These topics include adhesive shrinkage and thermal expansion, adhesive properties, joint geometry optimization, and design techniques, among others. The findings of these research efforts have all found use in practical applications, helping to solve complex problems in a variety of high-tech industries where there is a constant need to produce light and strong components that can withstand large temperature gradients. Therefore, the final sections of this work include a discussion on two specific application areas that demonstrate the strict demands that extreme temperature use imposes on adhesive joints and the methods used to improve their performance.

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“…It was shown that, for a joint with dissimilar adherents, the combination of two adhesives gave a better performance over the temperature range than a high temperature adhesive alone. Nakano et al [14] applied a thermal stress analysis of an adhesive butt joint which contained circular holes and rigid fillers in an adhesive and was under a non-uniform temperature field. The adherents were assumed to be rigid and the adhesive was replaced with a finite strip having holes and rigid fillers in it and the thermal stress distribution in the adhesive was analysed using a two-dimensional theory of elasticity.…”

Section: Introductionmentioning

confidence: 99%

Elastic-Plastic Thermal and Residual Stress Analysis of Adhesively Bonded Single Lap Joint

Şen

2016

Advanced Composites Letters

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In this work, an elastic-plastic thermal and residual stress analysis were performed for adhesively bonded single lap joint. For this purpose, thermoplastic composite adherents were bonded to each other with epoxy adhesive. Thermoplastic composite material was reinforced by steel-fibres, unidirectionally. Finite element method (FEM) was preferred to obtain thermal elastic and elastic-plastic stress distributions on single lap joint. Accordingly, modelling and solution processes were achieved using ANSYS software. So as to determine effects of uniform temperature loadings on thermal and residual stresses, different values of it were loaded on the joint, uniformly. Briefly, both thermal and residual thermal stresses were calculated under uniform temperature loading which was selected from 40 °C to 80 °C. According to obtained results different thermal expansion coefficients of composite adherents and adhesive layer caused thermal and residual stresses on adhesively bonded single lap joint due to applied uniform temperature loadings. Thermal stress values for x and y-directions are very different from each other owing to orthotropic material properties of thermoplastic composite. The magnitudes of elastic analyses results are higher than elastic-plastic analysis results. Contrary to elastic analysis results, elastic-plastic analysis results were nonlinear. Thermal and residual stresses are increased by increasing uniform temperature values, so the highest values were calculated when 80 °C. The plastic yielding was firstly come into being for 50 °C loading and it is expanded related to raising thermal loadings as nonlinear.

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Two-Dimensional Thermal Stress Analysis in Adhesive Butt Joints Containing Hole Defects and Rigid Fillers in Adhesive Under Non-Uniform Temperature Field

Cited by 14 publications

References 7 publications

Thermal and Geometrically Nonlinear Stress Analyses of an Adhesively Bonded Composite Tee Joint with Double Support

Thermal and Geometrically Nonlinear Stress Analyses of an Adhesively Bonded Composite Tee Joint with Double Support

Adhesive Joints for Low- and High-Temperature Use: An Overview

Elastic-Plastic Thermal and Residual Stress Analysis of Adhesively Bonded Single Lap Joint

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