Bonded joints design aided by computational tool

Ribeiro, Marcelo Leite; Tita, Volnei

doi:10.5028/jatm.2012.04032912

Cited by 2 publications

(2 citation statements)

References 8 publications

(8 reference statements)

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“…This behaviour is due to the load asymmetry, leading to significant joint rotations and corresponding σ y peak stresses at the mentioned locations [34]. This effect is minored in DLJ due to the load symmetry, which practically eliminates the transverse deflections and reflects on smaller σ y peak stresses (up to 1.7 times τ avg ), which still take place due to bending of the outer adherends [1,33]. Stepped-lap joints also result in an improved behaviour (highest σ y peak stresses of 0.8 times τ avg ), in this case owing to the adherends' collinearity, although variations between steps were still found [35].…”

Section: Peel and Shear Stresses Comparisonmentioning

confidence: 99%

“…In fact, stress distributions are similar between adhesives, although small quantitative variations in σ y and τ xy peak stresses were found depending on the adhesives' stiffness. This effect was tested in the work of Ribeiro and Tita [33]. Thus, this study enables a perception of the stress modifications induced by changing either the joint type and geometry and to discuss the P m tendencies found.…”

Section: Peel and Shear Stresses Comparisonmentioning

confidence: 99%

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Comparison of different adhesively-bonded joint types for mechanical structures

et al. 2018

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Adhesive bonding has been widely used in several industries, such as automotive and aeronautical. Nowadays, and with the advances of adhesive science, the use of this type of joining method has become more appealing due to the higher peel and shear strengths and also allowable ductility up to failure of the adhesives [1, 2]. Adhesivelybonded joints have some advantages over traditional joints (welded, bolted or riveted), such as reduced weight, more uniform stress distributions, absence of damage in the bonded parts, ease of manufacture and the possibility to join dissimilar materials [3]. However, bonded joints are yet not reliable in critical connections because of issues like fatigue and long-term behaviour uncertainties, and large scatter in the failure loads [4]. Two alternatives may be chosen for the analysis of adhesive joints: closed-loop analyses or analytical methods and numerical methods (e.g. finite element method or FEM). The first prediction methods for adhesive structures consisted of analytical formulations,

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Section: Peel and Shear Stresses Comparisonmentioning

confidence: 99%

Section: Peel and Shear Stresses Comparisonmentioning

confidence: 99%

Comparison of different adhesively-bonded joint types for mechanical structures

et al. 2018

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Assessing critical fracture energy in mode I for bonded composite joints: A numerical–experimental approach with uncertainty analysis

Beck,

da Silva,

da Silva

et al. 2024

Proceedings of the Institution of Mechanical Engineers, Part L:

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The manufacturing process of composite structural components involves the assembly of composite parts using adhesives, which introduces variations in the geometrical and mechanical properties of bonded joints. The fracture energy under mode-I loading ( G I c) is a parameter used to predict crack propagation and evaluate the residual strength of the joint. This work proposes a numerical-experimental procedure to determine G I c in mode I, while considering the uncertainties inherent in the manufacturing process of bonded joints. The proposed procedure employs a three-dimensional finite element model to simulate a double cantilever beam test, using finite element commercial software. The cohesive zone model is applied to simulate the mechanical behavior of the adhesive, and experimental data are used to feed the computational model. A Plackett-Burman design is performed to reduce the number of experiments and evaluate the effect of the main influence parameters. Force-displacement curves are obtained, the compliance-based beam method is applied to determine G I c in mode I, employing both trapezoidal and triangular traction-separation laws. The results are thoroughly examined, taking into account the potential strengths and limitations of the proposed procedure, particularly in its application to predicting the behavior of bonded composite joints under mode I loading conditions. The proposed approach can help to understand the uncertainties effect related to the manufacturing process of bonded joints on G I c values, and improve the reliability of predicting crack propagation and residual strength assessment in bonded joints.

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Bonded joints design aided by computational tool

Cited by 2 publications

References 8 publications

Comparison of different adhesively-bonded joint types for mechanical structures

Comparison of different adhesively-bonded joint types for mechanical structures

Assessing critical fracture energy in mode I for bonded composite joints: A numerical–experimental approach with uncertainty analysis

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