The structural integrity of a novel composite adhesively bonded flap-track beam

2011 ◽  
Vol 93 (8) ◽  
pp. 2049-2059 ◽  
Author(s):  
K.I. Tserpes ◽  
R. Ruzek ◽  
R. Mezihorak ◽  
G.N. Labeas ◽  
Sp.G. Pantelakis
Keyword(s):  
Structural Integrity ◽  
Adhesively Bonded ◽  
Track Beam

scholarly journals Structural integrity of adhesively bonded 3D-printed joints

2021 ◽  
pp. 107262
Author(s):  
Mohammad Reza Khosravani ◽  
Payam Soltani ◽  
Kerstin Weinberg ◽  
Tamara Reinicke
Keyword(s):  
Structural Integrity ◽  
Adhesively Bonded ◽  
3D Printed

Qualifications of Adhesives for Marine Composite-to-Steel Bonded Applications

2009 ◽  
Vol 25 (04) ◽  
pp. 198-205
Author(s):  
George W. Ritter ◽  
David R. Speth ◽  
Yu Ping Yang
Keyword(s):  
Mechanical Property ◽  
Structural Integrity ◽  
Adhesively Bonded ◽  
Load Bearing Capacity ◽  
Property Evaluation ◽  
Marine Industry ◽  
Straightforward Method ◽  
Bonded Composite ◽  
Steel Joints ◽  
Marine Composite

This paper describes a straightforward method for the design and certification of adhesively bonded composite to steel joints for the marine industry. Normally, certification is based on documented service at sea. Since these joints have not been previously deployed at sea, no data on their performance exist. Using an integrated combination of mechanical property evaluation and finite element modeling, the load- bearing capacity of a joint can be compared with the anticipated seaway loads. Calculated factors of safety for the sandwich design used here show that the joint has adequate strength to maintain structural integrity even after severe environmental exposure.

scholarly journals A Numerical and Experimental Study of Adhesively-Bonded Polyethylene Pipelines

Polymers ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1531 ◽  
Author(s):  
Guilpin ◽  
Franciere ◽  
Barton ◽  
Blacklock ◽  
Birkett
Keyword(s):  
Cohesive Zone ◽  
Adhesive Bonding ◽  
Structural Integrity ◽  
Cohesive Zone Model ◽  
Low Cost ◽  
Element Model ◽  
Zone Model ◽  
Adhesively Bonded ◽  
Lap Shear ◽  
Lap Shear Test

Adhesive bonding of polyethylene gas pipelines is receiving increasing attention as a replacement for traditional electrofusion welding due to its potential to produce rapid and low-cost joints with structural integrity and pressure tight sealing. In this paper a mode-dependent cohesive zone model for the simulation of adhesively bonded medium density polyethylene (MDPE) pipeline joints is directly determined by following three consecutive steps. Firstly, the bulk stress–strain response of the MDPE adherend was obtained via tensile testing to provide a multi-linear numerical approximation to simulate the plastic deformation of the material. Secondly, the mechanical responses of double cantilever beam and end-notched flexure test specimens were utilised for the direct extraction of the energy release rate and cohesive strength of the adhesive in failure mode I and II. Finally, these material properties were used as inputs to develop a finite element model using a cohesive zone model with triangular shape traction separation law. The developed model was successfully validated against experimental tensile lap-shear test results and was able to accurately predict the strength of adhesively-bonded MPDE pipeline joints with a maximum variation of <3%.

scholarly journals Significantly enhanced structural integrity of adhesively bonded PPS and PEEK composite joints by rapidly UV-irradiating the substrates

2020 ◽  
Vol 199 ◽  
pp. 108358
Author(s):  
Dong Quan ◽  
René Alderliesten ◽  
Clemens Dransfeld ◽  
Ioannis Tsakoniatis ◽  
Sofia Teixeira De Freitas ◽  
...  
Keyword(s):  
Structural Integrity ◽  
Composite Joints ◽  
Adhesively Bonded ◽  
Peek Composite

Failure Analysis of an Adhesively Bonded Graphite Composite/Steel Scarf Joint

1978 ◽  
Vol 100 (1) ◽  
pp. 64-69 ◽  
Author(s):  
A. B. Macander ◽  
D. R. Mulville
Keyword(s):  
High Performance ◽  
Structural Integrity ◽  
Strain Energy Release ◽  
Organic Matrix ◽  
Structural Elements ◽  
Adhesively Bonded ◽  
Graphite Composite ◽  
Scarf Joint ◽  
Bonded Composite ◽  
Composite Steel

Recent studies on the use of graphite fiber-organic matrix composites in Naval and commercial high performance ships have demonstrated the potential for significant weight savings and corresponding improvements in ship performance. Unlike conventional materials, structural elements fabricated with advanced composite materials require specialized attention. One area that is critical to the successful development of reliable composite structural elements is joining. This paper describes a method for determining the structural integrity of an adhesively bonded composite/steel scarf joint. An experimentally established failure criterion is presented based on a strain energy release rate formulation, which may be used to predict performance of the scarf joint under tensile loading.

scholarly journals Impact fatigue in adhesive joints

2008 ◽  
Vol 222 (10) ◽  
pp. 1981-1994 ◽  
Author(s):  
V V Silberschmidt ◽  
J P Casas-Rodriguez ◽  
I A Ashcroft
Keyword(s):  
Structural Integrity ◽  
High Energy ◽  
Epoxy Adhesive ◽  
Bonded Joints ◽  
Impact Fatigue ◽  
Adhesively Bonded ◽  
Low Velocity ◽  
Adhesively Bonded Joints ◽  
Aerospace Applications ◽  
Fatigue Crack Development

One of the forms of a vibro-impact effect in engineering components is impact fatigue (IF) caused by a cyclic repetition of low energy, low-velocity impacts, for instance, in aerospace structures. It can have a highly detrimental impact on performance and reliability of such components, exacerbated by the fact that in many cases it is disguised in loading histories by non-impact loading cycles with higher amplitudes. Since the latter are traditionally considered as most dangerous in standard fatigue, IF has not yet received deserved attention; it is less studied and practically unknown to specialists in structural integrity. Though there is a broad understanding of the danger of high-energy single impacts, repetitive impacting of components has been predominantly studied for very short series. This paper aims at the analysis of IF of adhesively bonded joints, which are becoming more broadly used in aerospace applications. The study is implemented for two types of typical adherends — an aluminium alloy and a carbon-fibre reinforced composite — and an industry-relevant epoxy adhesive. Various stages of fatigue crack development in adhesively bonded joints are studied for the conditions of standard and IF. The results obtained — in terms of crack growth rates, fatigue lives, and microstructures of fracture surfaces — are compared for the two regimes in order to find similarities and specific features.

Design and Analysis of Composite Window Frame for a Regional Aircraft

2020 ◽  
Vol 11 (04) ◽  
pp. 2050006
Author(s):  
João Afonso Gaspar Lopes ◽  
Omar Bacarreza ◽  
Zahra Sharif Khodaei
Keyword(s):  
Structural Integrity ◽  
Thermoplastic Composite ◽  
Design Criteria ◽  
Adhesively Bonded ◽  
Window Frame ◽  
Damage And Failure ◽  
Shear Loads ◽  
Failure Loads ◽  
Flight Loads ◽  
Fuselage Skin

This work presents the design and analysis of a thermoplastic composite window frame for integration into a regional aircraft. The main parameters which are investigated include buckling, damage and failure loads of a composite window frame subjected to shear loads repesentative of fuselage skin stress distribution due to flight loads. The attachment of such thermoplastic window frame to a thermoset fuselage skin was investigated including both adhesively bonded interface as well as riveting. Even though the bonded frame did meet the design criteria, its failure was very sudden, and the riveted assembly showed a considerably higher strength and structural integrity. The numerical simulation resulted in failure loads which matched very closely to experimental results.

A Finite Element Based Analysis of Double Strap Bonded Joints with CFRP and Aluminium

2017 ◽  
Vol 754 ◽  
pp. 237-240 ◽  
Author(s):  
Hugo Biscaia ◽  
João Cardoso ◽  
Carlos Chastre
Keyword(s):  
Finite Element ◽  
Structural Integrity ◽  
Fiber Reinforced Polymers ◽  
Bonded Joints ◽  
Stress Concentrations ◽  
Adhesively Bonded ◽  
Joint Configuration ◽  
Fracture Modes ◽  
Bonded Joint ◽  
Adhesively Bonded Joint

The bonding between two different materials or between same materials is a quite popular method. Unlike fastener joints, it avoids undesirable stress concentrations and doesn't demand an intrusive application to ensure the good performance of the joint. However, depending on the configuration of the adhesively bonded joint, its performance responds differently and the choice (if possible to make) on the best configuration, i.e. the configuration that originates the highest strength and/or stiffness, may be hard to make. Within this context, several configurations of aluminium-to-aluminium bonded joints unstrengthened and strengthened with fiber reinforced polymers (FRP) were modelled using a commercial finite element code. The linearity and nonlinearity of the FRP composite and the aluminium were considered, respectively, and the adhesively bonded joints were subjected to a regular displacement that intended to simulate a tensioning load. Also, the nonlinearities of the interfaces were considered in the form of nonlinear cohesive adhesive laws. The fracture Modes I and II were defined trough a bond-slip relation with a bi-linear shape and the Mohr-Coulomb failure criterion is used for the coupling of the cohesive adhesive laws of the interface when the debonding process of the bonded joint configuration implies the interaction between both fracture modes, i.e. the joint is under a mixed-mode (Mode I+II) situation. The results are presented and discussed and the configurations of the bonded joints are all compared through bond stress distributions and load-slip responses. The study herein presented is, therefore, a contribution to the analysis of the structural integrity of bonded joints between FRP composites and aluminium substrates, helping also on the choice of the most adequate bonded joint configuration and corresponding reinforcement to be used and applied in practice.

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