Softening behaviour modelling of aluminium alloy 6082 using a non-linear cohesive zone law

Kim, Kyungmok

doi:10.1177/1464420714525134

Cited by 11 publications

(6 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Under mixed mode, energetic criteria are often used to combine tension and shear. 28 In this work, triangular pure and mixed-mode laws, i.e., with linear softening, were considered for the analysis ) is attained, the material stiffness is degraded. Complete separation is predicted by a linear power law form of the required energies for failure in the pure modes.…”

Section: Methodsmentioning

confidence: 99%

“…Under mixed mode, energetic criteria are often used to combine tension and shear. 28 In this work, triangular pure and mixed-mode laws, i.e., with linear softening, were considered for the analysis (Figure 7). The elastic behaviour of the cohesive elements up to the tipping tractions is defined by an elastic constitutive matrix-relating stresses and strains across the interface, containing E and ν as main parameters.…”

Section: Predictive Techniquesmentioning

confidence: 99%

See 1 more Smart Citation

Overview of different strength prediction techniques for single-lap bonded joints

Sousa

Campilho

Marques

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part L:

View full text Add to dashboard Cite

Adhesive joints have been used in several fields of engineering, and their applications are vast. Due to their easy and quick fabrication process, single-lap joints are a common configuration. The increase of strength, weight reduction and resistance to corrosion are some of the advantages of this kind of joint over traditional joining methods. However, stress concentrations at the overlap edges are one of the main disadvantages. There are very few accurate design techniques for the diversity of bonded joints that can be found in real applications, which constitutes an obstacle to the use of this bonding method in structural applications. This work aims at comparing different analytical and numerical methods in the strength prediction of single-lap joints with different overlap lengths (L O). The main objective is to evaluate which predictive method is the best. Adhesive joints were produced between aluminium adherends using a brittle epoxy adhesive (Araldite Õ AV138), a moderately ductile epoxy adhesive (Araldite Õ 2015) and a ductile polyurethane adhesive (Sikaforce Õ 7888). Different analytical methods were considered, together with two numerical techniques: cohesive zone models (CZM) and the extended finite element method (XFEM), allowing the comparative analysis. The analytical methods showed that they only give relatively accurate results in very specific conditions. The CZM analysis with the triangular law revealed to be a very accurate method, with the exception of joints with very ductile adhesives. On the other hand, the XFEM analysis was not adequate, especially for crack growth in mixed mode.

show abstract

Section: Methodsmentioning

confidence: 99%

“…Under mixed mode, energetic criteria are often used to combine tension and shear. 28 In this work, triangular pure and mixed-mode laws, i.e., with linear softening, were considered for the analysis (Figure 7). The elastic behaviour of the cohesive elements up to the tipping tractions is defined by an elastic constitutive matrix-relating stresses and strains across the interface, containing E and ν as main parameters.…”

Section: Predictive Techniquesmentioning

confidence: 99%

Overview of different strength prediction techniques for single-lap bonded joints

Sousa

Campilho

Marques

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part L:

View full text Add to dashboard Cite

show abstract

“…Under mixed mode, energetic criteria are often used to combine tension and shear. 35 In this work, triangular pure and mixed-mode laws, i.e., with linear softening, were considered. The elastic behaviour of the cohesive elements up to the tipping tractions is defined by an elastic constitutive matrix relating stresses and strains across the interface, and containing the stiffness parameters E and G of the material.…”

Section: Methodsmentioning

confidence: 99%

Numerical analysis of the mixed-mode fracture of bonded joints depending on the adhesive thickness

Macedo

Campilho

Silva

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part E:

View full text Add to dashboard Cite

The mixed-mode strength of bonded joints can be predicted by techniques such as cohesive zone models (CZM), which requires the estimation of the adhesive strength and fracture toughness ( GC). Under the scope of fracture properties, the tensile and shear fracture toughness ( GIC and GIIC, respectively) and the corresponding mixed-mode behaviour are particularly relevant. Moreover, these parameters highly depend on the adhesive thickness ( tA), making it relevant to validate and propose CZM laws for bonded joint design. This work numerically addressed the tA influence on the mixed-mode fracture process of adhesive joints. For this purpose, single-leg bending (SLB) test experimental data was used, considering joints with composite adherends and a ductile adhesive, and tA from 0.1 to 2.0 mm. A numerical CZM analysis was performed, including the experimental and numerical load-displacement ( P- δ) curves’ comparison for validation, followed by the CZM law estimation and fracture envelope validation, for all tA. The effect of the different CZM parameters on the results was finally evaluated. Overall, it was possible to numerically ascertain the tA effect on the fracture behaviour of adhesive joints and to propose a numerical technique for mixed-mode bonded joint analysis.

show abstract

“…Cohesive zone law is a useful method for describing interfacial failure between two physical parts. Various cohesive zone models were developed and used for simulating damage such as creep, fatigue, fretting fatigue, and interfacial cracking at the macroscale and microscale [6][7][8][9]. Creeprupture of aluminium alloys was modelled with a timedependent bilinear cohesive zone law [6].…”

Section: Introductionmentioning

confidence: 99%

“…Crack initiation and propagation were simulated with a two-dimensional finite element model. Softening behaviour of aluminium alloy under pure-tension loading was modelled with a nonlinear cohesive zone law [9]. Nonlinear softening behaviour of heat-treated and nonheat-treated specimens was described with the properties of a cohesive zone.…”

Section: Introductionmentioning

confidence: 99%

Development of a Time-Dependent Friction Model for Frictional Aging at the Nanoscale

Baek¹,

Kim

2016

Journal of Nanomaterials

Self Cite

View full text Add to dashboard Cite

A model for describing frictional aging of silica is developed at the nanoscale. A cohesive zone is applied to the contact surface between self-mated silica materials. Strengthening of interfacial bonding during frictional aging is reproduced by increasing fracture energy of a cohesive zone. Fracture energy is expressed as a function of hold time between self-mated silica materials. Implicit finite element simulation is employed, and simulation results are compared with experimental ones found in the literature. Calculated friction evolutions with various hold times are found to be in good agreement with experimental ones. Dependence of mesh size and cohesive thickness is identified for obtaining accurate simulation result.

show abstract

Softening behaviour modelling of aluminium alloy 6082 using a non-linear cohesive zone law

Cited by 11 publications

References 11 publications

Overview of different strength prediction techniques for single-lap bonded joints

Overview of different strength prediction techniques for single-lap bonded joints

Numerical analysis of the mixed-mode fracture of bonded joints depending on the adhesive thickness

Development of a Time-Dependent Friction Model for Frictional Aging at the Nanoscale

Contact Info

Product

Resources

About