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Wavelets Entropy and Zero-Crossing White-Noise Test Applied to Ultrasonic Classification of Degrading Adhesive Joints
Viewed 283 times since Sat, Aug 20, 2011
Composite adhesive joints were exposed to harsh environmental conditions and subjected to destructive and non-destructive ultrasonic testing. The signals were subjected to numerous wavelet transforms in an attempt to decipher a means of... Read More
Validation of Bonded Composite Doubler Technology Through Application Oriented Structural Testing
Viewed 279 times since Tue, Sep 6, 2011
The test series included nine different specimen.  Read More
THE USE OF THERMAL MISMATCH STRESSES TO DETECT DISBOND INITIATION AND PROPAGATION IN METAL/COMPOSITE BONDED JOINTS USING A CFBG FIBRE OPTICAL SENSOR
Viewed 248 times since Sun, Oct 28, 2012
Chirped fibre Bragg grating (CFBG) sensors have been used to monitor the initiation and propagation of disbonds in composite/metal bonded joints. The CFBGs were embedded in the glass fibre reinforced plastic (GFRP) adherend of GFRP/aluminium single... Read More
The Fuzzy Finite Element Stress Analysis of Adhesive-Bonded Single Lap Joints
Viewed 269 times since Tue, Sep 4, 2012
An adhesive-bonded single lap joint is analyzed using a new fuzzy nite element model. In the model, Young's moduli and Poisson's ratios of the joint materials are taken as fuzzy numbers in order to take the uncertainty of the material... Read More
TENSILE TESTS ON BONDED DOUBLE-STRAP JOINTS BETWEEN PULTRUDED GFRP PROFILES
Viewed 295 times since Tue, May 8, 2012
profiles with different geometry are presented. For every kind of joint the ultimate failure load, the stress-strain curve and the mechanism of failure is indicated. The behaviour of these joints typically is elastic-brittle. The ultimate failure... Read More
STRESS ANALYSIS OF LAMINATED COMPOSITE CYLINDERS UNDER NON-AXISYMMETRIC LOADING
Viewed 363 times since Sun, Jun 16, 2013
The use of thick-walled composite cylinders in structural applications has seen tremendous growth over the last decade.  Applications include pressure vessels, flywheels, drive shafts,  spoolable tubing, and production risers.  In... Read More
Stress Analysis of In-Plane, Shear-Loaded, Adhesively Bonded Composite Joints and Assemblies
Viewed 285 times since Sun, Jun 16, 2013
Recent small aircraft that have been certified in the United States, such as the Cirrus SR20 and the Lancair Columbia 300, share similar structural attributes. Specifically, they are both of nearly all-composite construction and both make extensive... Read More
Stress Analysis of Adhesively Bonded Double- Lap Joints Subjected to Combined Loading
Viewed 435 times since Sun, Jun 16, 2013
Adhesively bonded joints are preferred over the conventional methods of joining such as riveting, welding, bolting and soldering. Some of the main advantages of adhesive joints compared to conventional joints are the ability to join dissimilar... Read More
Stress Analysis of Adhesive Bonded Joints Under In-Plane Shear Loading
Viewed 256 times since Sun, Jun 16, 2013
A closed-form stress analysis of an adhesive bonded lap joint subjected to spatially varying inplane shear loading is presented. The solution, while similar to Volkersen’s treatment of tension loaded lap joints, is inherently two-dimensional,... Read More
Strength of Adhesive-Bonded Lap Joints in Composite Structures
Viewed 266 times since Tue, May 7, 2013
Many fiber-reinforced composite structures are made up of a number of modules for ease ofmanufacturing and handling. Modular construction requires some form of jointing system that will transmit the applied loading between the different modules and... Read More
Strength of Adhesive Joints: A Parametric Study
Viewed 201 times since Wed, Oct 23, 2013
A parametric study has been carried out to assess the reliability of different failure criteria being used by engineers/designers to predict the static strength of adhesively bonded structures. A series of simulated experiments using finite element... Read More
Strength and Fatigue Life Modeling of Bonded Joints in Composite Structure
Viewed 211 times since Tue, May 7, 2013
The aerospace industry lacks a validated, practical analysis method for the strength, durability, and damage tolerance evaluation of bonded joints. This paper presents the results of a combined strength and fracture analysis approach applied to... Read More
STACKING LAMINATE EFFECTS ON ADHESIVE LAP JOINTS STRENGTH
Viewed 298 times since Mon, Sep 17, 2012
This paper is concerned with the influence of the surface treatment, lay-up and stacking sequence on strength of single lap joints. The tensile tests were carried out on specimen joints using different adherents combination (laminate composites and... Read More
SPLINE VARIATIONAL THEORY FOR COMPOSITE BOLTED JOINTS
Viewed 247 times since Mon, Sep 17, 2012
The hybrid numerical approximation model for predicting stresses and strains in open-hole composites was refined. The model was also expanded to include singular full-field stress analysis of multi-interface composites under mechanical, thermal and... Read More
Special 2-D and 3-D Geometrically Nonlinear Finite Elements for Analysis of Adhesively Bonded Joints
Viewed 290 times since Wed, Aug 22, 2012
Special two and three- dimensional adhesive elements have been developed for stress and displacement analyses in adhesively bonded joints. Both the 2-D and 3-D elements are used to model the whole adhesive system: adherends and adhesive layer. In the... Read More
SINGLE-CYCLE AND FATIGUE STRENGTHS OF ADHESIVELY BONDED LAP JOINTS
Viewed 256 times since Thu, Jun 7, 2012
This study considers a composite-to-steel tubular lap joint in which failure typically occurs when the adhesive debonds from the steel adherend. The same basic joint was subjected to compressive and tensile axial loads (single-eycle) as well as... Read More
Novel Design of a Bonded Lap Joint
Viewed 299 times since Sun, Mar 3, 2013
A new design of a single-lap joint was proposed and investigated experimentally. In this new design, load eccentricity as well as singular peel stresses in the joint interface were avoided. In fact, numerical calculations show that, in the new design... Read More
Measurement Good Practice Guide No- 28 Durability Performance of Adhesive Joints
Viewed 234 times since Sun, Mar 3, 2013
Considerable effort is required in selecting adhesive systems and optimising process variables to maximise long-term strength retention under hostile environments. This document is intended to give guidance on the selection and use of test methods... Read More
LASER ABLATION ASSISTED ADHESIVE BONDING OF AUTOMOTIVE STRUCTURAL COMPOSITES
Viewed 276 times since Sat, Apr 13, 2013
Laser ablation has been evaluated as a surface pretreatment prior to adhesive bonding. In prior experimental work, it was observed that when adhesively bonded, composite, single lap shear samples fail, the fracture often occurs at either the... Read More
INCREASING THE STRENGTH OF ADHESIVELY BONDED JOINTS BY TAPERING THE ADHERENDS
Viewed 267 times since Thu, Nov 15, 2012
Wind turbine blades are often fabricated with composite materials. These composite blades are frequently attached to a metallic structure with an adhesive bond. For the baseline composite-to-steel joint considered in this study, failure typically... Read More
Experiments on Double-lap Joints with Epoxy, Polyurethane and ADP Adhesives
Viewed 298 times since Sun, Jun 17, 2012
Fiber-reinforced polymer (FRP) elements are commonly joined with mechanical connections such as steel profiles. However, the use of bolts and rivets is not material-adapted due to the anisotropic character and brittle behavior of FRP materials, and... Read More
EFFICIENT STRESS ANALYSIS OF ADHESIVELY BONDED JOINTS BY FINITE ELEMENT TECHNIQUES
Viewed 276 times since Sun, Mar 4, 2012
The paper documents ongoing research on the field of stress calculations in the adhesive layer of bonded joints and bonded structures. Aim of the research is to develop simple, general, portable, efficient and accurate finite element techniques for... Read More
EFFECT OF FIBRE REINFORCED ADHESIVES IN BONDED JOINTS WITH COMPOSITE ADHERENDS SUBJECTED TO TENSILE AND IMPACT LOADS - NUMERICAL STUDY
Viewed 315 times since Wed, Jan 25, 2012
The polymer composites are nowadays playing an important role in structural applications. The need for joining these materials arises, because the structures are seldom manufactured as a single integrated unit. To achieve the minimum saving in weight... Read More
Durability of Adhesively Bonded Structures
Viewed 257 times since Tue, Apr 3, 2012
The long-term durability of adhesively bonded structures is critical in determining their utility in replacing mechanical fastening systems. The achievement of high static shear strengths in bonded joints does not necessarily translate to good... Read More
Development of an adhesive joint design and analysis tool
Viewed 203 times since Wed, Oct 23, 2013
The shear and peel stress distribution in a single-lap, tapered-lap and modified scarf joint between two isotropic adherends is analyzed using a linear elastic analysis. The analysis is incorporated into a computerized toolbox for joint design... Read More
Detailed Analysis of a Complex Bonded Joint
Viewed 305 times since Sun, Dec 25, 2011
The motivation for this research was the discovery that strength of material analyses of bonded joints was overly conservative. The objective of this paper was to evaluate both stress- and interlaminar-fracture-based analysis methods based on... Read More
DESIGNING FOR TAPERS AND DEFECTS IN FRP-STRENGTHENED METALLIC STRUCTURES
Viewed 287 times since Sun, Dec 25, 2011
Adhesively bonded FRP strengthening for metallic structures relies critically on the adhesive joint between the FRP and the metal. Current best-practice in design allows the distribution of shear and peel stress along the adhesive connection to be... Read More
Design, Analysis, and Testing of the CASPAR Multi-Payload Adapter Bonded Composite Joint
Viewed 334 times since Thu, Dec 22, 2011
The CASPAR multi-payload adapter will provide a shared ride access to space for two 1,500-lbm satellites or up to four 400-lbm (ESPA-class) satellites. The adapter consists of two symmetrical carbon fiber composite shells joined by a Latching... Read More
Debonding of Stitched Composite Joints: Testing and Analysis
Viewed 307 times since Thu, Dec 15, 2011
The effect of stitches on the failure of a single lap joint configuration was determined in a combined experimental and analytical study. The experimental study was conducted to determine debond growth under static monotonic loading.... Read More
Computer Aided Design of Bonded Joints
Viewed 300 times since Sat, Nov 26, 2011
An educational software; Bonding, is introduced for the design of bonded joints. Bonding is a relatively simple, user-friendly and yet powerful tool for the analysis and design within the emerging arena of bonding. The user starts the ... Read More
Computational Analysis of Geometric Nonlinear Effects in Adhesively Bonded Single Lap Composite Joints
Viewed 288 times since Sat, Nov 26, 2011
The use of fibre composites has shown a tremendous growth in many branches during the last decades.  Read More
Closed-form solutions for adhesively bonded joints
Viewed 790 times since Tue, Nov 8, 2011
An extensive literature review on existing analytical models for both single and double-lap joints has been made to assist the designer to choose the right model for a particular application. The literature review shows that almost all analytical... Read More
Characterization of In-Plane, Shear-Loaded Adhesive Lap Joints: Experiments and Analysis
Viewed 360 times since Tue, Nov 8, 2011
The growing applications of adhesive bonding in aircraft structures requires more emphasis be placed on analytical models to predict failure and load carrying capability. As these analytical models become available, they must also be validated with... Read More
Boundary element modeling and analysis of adhesive bonded structural joints
Viewed 269 times since Fri, Oct 21, 2011
In this paper, a boundary element technique for modeling and analysis of adhesive bonded structural joints is presented. The formulation is developed in the framework of the anisotropic elasticity and attention is focused on the application to... Read More
Applications of Fracture Mechanics to the Durability of Bonded Composite Joints
Viewed 248 times since Sat, Oct 8, 2011
The increased numbers of bonded composite components and bonded repairs of cracked structures make knowledge of adhesive bonding crucial to aircraft design and life extension. This report covers an effort which focused on using fracture mechanics to... Read More
Analysis Tools for Adhesively Bonded Composite Joints, Part 2: Unified Analytical Theory
Viewed 380 times since Thu, Oct 6, 2011
Adhesively bonded joints are currently of interest to the aerospace field due to the heavy reliance on bonded composite structures in new aircraft designs. In response, tools for joint analysis have been developed and examined in this two... Read More
Analysis Tools for Adhesively Bonded Composite Joints, Part 1: Higher-Order Theory
Viewed 331 times since Thu, Oct 6, 2011
Anew application of the higher-order theory to the analysis of adhesively bonded composite joints is investigated. The adhesively bonded joint problem is currently of interest to the aerospace field because of the heavy reliance on bonded... Read More
Analysis of tongue and groove joints for thick laminates
Viewed 234 times since Wed, Jan 30, 2013
A finite element evaluation of local stresses in the adhesive and adherends is presented for a tongue-and-groove joint of a homogenized thick composite laminate to steel plate. The quasi-isotropic laminate is made of glass fabric/vinyl ester plies.... Read More
Analysis of Adhesively Bonded Single Lap Joint in Laminated Frp Composites Subjected to Transverse Load
Viewed 323 times since Mon, Oct 3, 2011
The present investigation deals with the static analysis of adhesively bonded single lap joint in laminated FRP composites using three-dimensional theory of elasticity based finite element method. The finite element model is validated with... Read More
Analysis of adhesive-bonded single-lap joint with an interfacial crack and a void
Viewed 280 times since Wed, Jan 30, 2013
Adhesive-bonded joints are increasingly being used in aerospace and automotive industries due to the ease with which they can performed. Like other joints, e.g. bolted joints, one of the issues in adhesive-bonded joints is the prediction of failure... Read More
Analysis method for inelastic, adhesively bonded joints with anisotropic adherends
Viewed 327 times since Mon, Oct 3, 2011
A one-dimensional analysis method for evaluating adhesively bonded joints composed of anisotropic adherends and adhesives with nonlinear material behavior is presented in the proposed paper. The strain and resulting stress field in a... Read More
ANALYSIS AND DESIGN OF ADVANCED COMPOSITE BONDED JOINTS
Viewed 251 times since Thu, Nov 28, 2013
Advances in the analysis ot adhesive-bonded joints are presented in this report, with particular emphasis on advanced composite structures. The joints analyzed are of double-lap, single-lap, scarf, stepped-lap and tapered-lap configurations. Tensile,... Read More
Analysis and Design of Adhesive-Bonded Corner Joints
Viewed 385 times since Mon, Oct 3, 2011
A corner joint was investigated using finite element method. Since the geometry along the width of the corner joint is uniform and load does not change in that direction, the problem was assumed to be plane strain. In addition, it was... Read More
AN OVERVIEW OF ADHESIVELY BONDED JOINTS IN FIBRE-REINFORCED PLASTIC COMPOSITE MATERIALS
Viewed 307 times since Tue, Apr 3, 2012
A review of the investigations that have been made on adhesively bonded joints of fibre-reinforced plastic (FRP) composite structures is presented. The effects of surface preparation, joint configuration, adhesive properties and environmental factors... Read More
Adhesively bonded joints in composite materials-an overview
Viewed 6396 times since Wed, Jan 30, 2013
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,... Read More
Adhesively Bonded Joints between FRP sandwich and metal
Viewed 352 times since Sat, Sep 24, 2011
This report presents several joint elements developed for joining large FRP sandwich panels to ships. Read More
ADHESIVELY BONDED CARBON/TITANIUM JOINTS UNDER IN-PLANE AND BENDING LOADS
Viewed 328 times since Tue, Sep 20, 2011
The goal of this research is to optimize the design of single lap joints made by joining composite material to metals. The single lap joint under both out-of-plane load and tensile load was examined. It is observed that designing the joint... Read More
Adhesively Bonded Carbon-Titanium Joints Under In-plane and Bending Loads
Viewed 199 times since Sat, May 14, 2016
The goal of this research is to optimize the design of single-lap joints made by joining composite material to metals. The single-lap joint under both out-of-plane load and tensile load was examined. It is observed that designing a joint for one kind... Read More
ADHESIVE-BONDED SINGLE-LAP JOINTS
Viewed 373 times since Tue, Sep 13, 2011
Explicit analytical solutions are derived for the static load-carrying capacity of single-lap adhesive-bonded joints. A purely-elastic analysis represents a considerable improvement over the classical solution by Goland and Reissner. Also,... Read More
ADHESIVE-BONDED SCARF AND STEPPED-LAP JOINTS
Viewed 1859 times since Tue, Sep 20, 2011
Continuum mechanics solutions are derived for the static load-carrying capacity of scarf and stepped-lap adhesive-bonded joints. The analyses account for adhesive plasticity and adherend stiffness imbalance and thermal mismatch. The ... Read More
ADHESIVE-BONDED DOUBLE-LAP JOINTS
Viewed 529 times since Tue, Sep 13, 2011
Explicit analytical solutions are derived for the static load carrying capacity of double-lap adhesive-bonded joints. The analyses extend the elastic solution of Volkersen and cover adhesive plasticity, adherend stiffness imbalance and ... Read More
A study of the non-linear behaviour of adhesively-bonded composite assemblies
Viewed 280 times since Tue, Sep 13, 2011
The objective of this study is to define a reliable tool for dimensioning of adhesively bonded assemblies, particularly for marine and underwater applications. This paper presents experimental and numerical results, which describe the non... Read More
A NONLINEAR JOINT ELEMENT FOR THE ANALYSIS OF ADHESIVE BONDED JOINTS
Viewed 341 times since Wed, Sep 7, 2011
A two and three dimensional nonlinear finite element for the analysis of bonded joints in composite and metallic structures is developed. The element is capable of modeling near-zero thickness bond lines without the numerical difficulties... Read More
A MECHANICAL COMPARISON OF MELDING AND ADHESIVE BONDING IN A T-STIFFENED CARBON FIBRE/EPOXY SECTION
Viewed 459 times since Wed, Aug 31, 2011
Melding is an alternative joining method to adhesive bonding and mechanical fastening. Melding utilizes the low-cost, out-of-autoclave Quickstep™ composite curing process. This work involved the production and mechanical testing of a generic T... Read More