scholarly journals Numerical Studies on Mechanical Behavior of Adhesive Joints

2015 ◽  
Vol 2015 ◽  
pp. 1-13 ◽  
Author(s):  
Xiaocong He ◽  
Yue Zhang
Keyword(s):  
Mechanical Behavior ◽  
Adhesive Layer ◽  
Linear Interpolation ◽  
Adhesive Joints ◽  
Smooth Transition ◽  
Triangular Prism ◽  
Suitable Model ◽  
Reduced Integration ◽  
Hybrid Formulation ◽  
Quadratic Interpolation

This paper describes some finite element models for analyzing the mechanical behavior of adhesive joints. In these models five layers of solid elements were used across the adhesive layer in order to increase the accuracy of the results. The finite elements were refined gradually in steps from adherends to adhesive layer. In these models, most of the adherends and adhesive were modeled using solid brick elements but some solid triangular prism elements were used for a smooth transition. In some of the models, linear interpolation elements of full or reduced integration and of hybrid formulation were used. In other models, quadratic interpolation elements of full or reduced integration and of hybrid formulation were used. Comparisons are drawn between models with different modeling approaches as well as different types of element combinations in order to find a suitable model to predict the behavior of adhesive joints.

Stress Analysis of Bonded Joint Using Solid Element Combinations

2013 ◽  
Vol 467 ◽  
pp. 332-337
Author(s):  
Xiao Cong He
Keyword(s):  
Finite Element ◽  
Mechanical Behaviour ◽  
Adhesive Layer ◽  
Smooth Transition ◽  
Triangular Prism ◽  
Suitable Model ◽  
Bonded Joints ◽  
Adhesively Bonded ◽  
Adhesively Bonded Joints ◽  
Bonded Joint

This paper describes some finite element combinations to analyse the mechanical behaviour of bonded joints. In finite element models five layers of solid elements were used across the adhesive layer in order to increase the accuracy of the results. The finite elements were refined gradually in steps from adherends to adhesive layer. In these models, most of the adherends and adhesive were modeled using solid brick elements but some solid triangular prism elements were used for a smooth transition. Comparisons are performed between different types of first-order element combinations in order to find a suitable model to predict the mechanical behaviour of adhesively bonded joints.

Influence of Mechanical Behavior of Adhesives on Shear Stress Distributions in the Single-Lap Adhesive Joints

2011 ◽  
Vol 306-307 ◽  
pp. 1126-1129
Author(s):  
Xiao Cong He
Keyword(s):  
Shear Stress ◽  
Mechanical Behavior ◽  
Three Dimensional ◽  
Viscoelastic Behavior ◽  
Adhesive Layer ◽  
Adhesive Joints ◽  
Shear Stresses ◽  
Stress Distributions ◽  
Element Analysis ◽  
Three Dimensional Finite Element

This paper deals with the effects of mechanical behavior of adhesives on the shear stress distributions of single-lap adhesive joints under tension using the three-dimensional finite element analysis (FEA) technique. Numerical examples are provided to show the influence on the shear stresses of the joints using adhesives of different characteristics which encompass the entire spectrum of viscoelastic behavior. FEA solutions of the shear stress distributions in the adhesive layer have been obtained for four typical characteristics of adhesives. The results indicate that Young’s modulus and Poisson’s ratios of adhesives strongly affect the shear stress distributions of the joints.

Comparisons of Finite Element Models of Bonded Bonded Joints

2011 ◽  
Vol 66-68 ◽  
pp. 2192-2197 ◽  
Author(s):  
Xiao Cong He
Keyword(s):  
Finite Element ◽  
Adhesive Layer ◽  
Finite Element Models ◽  
Bonded Joints ◽  
Reduced Integration ◽  
Hybrid Formulation

Thispaperdealswithcomparisonsoffiniteelementmodelsofadhesivelybondedjoints. Inordertoincreasetheaccuracyoftheresults,fivelayersofsolidelementswereusedacrossthe adhesivelayerwhichwasonly0.05mminthickness.Thefiniteelementswererefinedgraduallyin steps from adherends to adhesive layer. In these models, most regions of the adherends and adhesiveweremodelledusingsolidbrickelementsbutsomesolidtriangularprismelementswere usedforasmoothtransition.Insomeofthemodels,linearinterpolationelementsoffullorreduced integrationandofhybridformulationwereused.Inothermodels,quadraticinterpolationelements of full or reduced integration and of hybrid formulation were used. Comparisons are performed betweenmodelswithdifferentmodellingapproachinordertofindasuitablemodeltopredictthe mechanicalbehaviourofadhesivelybondedjoints.

Bond Thickness Effects upon Dynamic Behaviour in Adhesive Joints

2010 ◽  
Vol 97-101 ◽  
pp. 3920-3923 ◽  
Author(s):  
Xiao Cong He
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Dynamic Behaviour ◽  
Adhesive Layer ◽  
Adhesive Joints ◽  
Response Functions ◽  
Frequency Range ◽  
Element Analysis ◽  
Cantilevered Beam ◽  
Different Thickness

The influence of adhesive layer thickness on the dynamic behaviour of the single-lap adhesive joints is investigated in this paper. The ABAQUS finite element analysis (FEA) software was used to predict the frequency response functions (FRFs) of the single-lap adhesive joints of different thickness of the adhesive layer. As a reference, the FRFs of a cantilevered beam without joint were investigated as well. It is clear that the FRFs of the four beams are close to each other within the frequency range 0~1000 Hz. It is also found that the composite damping of the single-lap adhesive joint increases as the thickness of the adhesive layer increases.

Shear Stress Discontinuities in Adhesive Joints

2015 ◽  
Vol 1088 ◽  
pp. 758-762
Author(s):  
Xiao Cong He
Keyword(s):  
Shear Stress ◽  
Stress Concentration ◽  
Stress Distribution ◽  
Three Dimensional ◽  
Adhesive Layer ◽  
Adhesive Joints ◽  
Shear Stress Distribution ◽  
Element Analysis ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element

This paper deals with the stress discontinuities in shear stress distribution of adhesive joints. The three-dimensional finite element analysis (FEA) software was used to model the joints and predict the shear stress distribution along the whole beam. The FEA results indicated that there are stress discontinuities existing in the shear stress distribution within adhesive layer and adherends at the lower interface and the upper interface of the boded section. The numerical values of the shear stress concentration at key locations of the joints and the stress concentration ratio are discussed.

Effect of Adhesive Behavior on Normal Stress Distributions in the Single-Lap Adhesive Joints

2015 ◽  
Vol 1088 ◽  
pp. 769-773
Author(s):  
Xiao Cong He
Keyword(s):  
Finite Element ◽  
Normal Stress ◽  
Three Dimensional ◽  
Adhesive Layer ◽  
Elastic Stiffness ◽  
Adhesive Joints ◽  
Stress Distributions ◽  
Element Analysis ◽  
Element Technique ◽  
Three Dimensional Finite Element

The effect of adhesives behavior on the normal stress distributions of single-lap adhesive joints is investigated using the three-dimensional finite element technique. Numerical examples are provided to show the influence on the normal stresses of the joints using adhesives of different characteristics which encompass the entire spectrum of elastic stiffness behaviour. finite element analysis solutions of the normal stress distributions in the adhesive layer have been obtained for four typical characteristics of adhesives. The results indicate that Young’s modulus and Poisson’s ratios of adhesives strongly affect the normal stress distributions of the joints.

Effect of Adhesive Layer Thickness on the Shear Strength of Adhesively Bonded Steel Joints in Wet Environment

2016 ◽  
Vol 836 ◽  
pp. 78-82 ◽  
Author(s):  
Sugiman ◽  
Ilham Akbar ◽  
Emmy Dyah Sulistyowati ◽  
Paryanto Dwi Setyawan
Keyword(s):  
Mechanical Properties ◽  
Shear Strength ◽  
Adhesive Layer ◽  
Static Strength ◽  
Adhesive Joints ◽  
Deionized Water ◽  
Adhesively Bonded ◽  
Moist Environment ◽  
Adhesive Thickness ◽  
Steel Joints

The paper presents the static strength of adhesively bonded steel joints aged in deionized water at a temperature of 60°C for 15 days at various adhesive thicknesses from 0.1 mm to 0.5 mm. Water uptake and the bulk adhesive tensile properties after aged in the same environment as the joints were also presented. It has been shown that water diffusion into the adhesive is non Fickian. The absorbed water in the adhesive significantly decreases the mechanical properties and it affects the static strength of the bonded steel joints. The effect of water is shown to be significant when the adhesive thickness is thicker than 0.2 mm as the static strength decreases sharply. This information is useful when designing the adhesive joints using thick adhesive layer exposed in moist environment.

Sign in / Sign up

Export Citation Format

Share Document