Interfacial stress analysis of functionally graded beams strengthened with a bonded hygrothermal aged composite plate

Bensaid, Ismail; Kerboua, Bachir

doi:10.1080/09276440.2016.1196333

Cited by 6 publications

(2 citation statements)

References 37 publications

(45 reference statements)

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“…Especially, nonlinearity attributed to the Mullins effect [1] and Payne effect [2] made a study of elastomers more challenging. For the structural analysis of polymer matrix composites, including elastomers, the finite element analysis (FEA) methods are mostly adopted [3,4]. While studying the viscoelasticity and hyperelasticity of elastomer matrix with FEA, phenomenological models such as the generalized Maxwell model and neo-Hookean model are commonly adopted, respectively.…”

Section: Introductionmentioning

confidence: 99%

A molecular structure-informed viscoelastic constitutive model for natural rubber materials

Jung¹,

Park²,

Ryu³

et al. 2021

Funct. Compos. Struct.

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This paper presents a molecular structure-informed viscoelastic constitutive equation that adopts the Doi–Edward’s tube model with coarse-grained molecular dynamics simulation and primitive path analysis. Since this model contains polymer physics-related parameters directly obtained from molecular simulations, it can reflect molecular information in predictions of the viscoelastic behavior of elastomers, unlike other empirical models. The proposed incremental formulations and constitutive stiffness matrix were implemented into implicit finite element analysis codes as a user-supplied material model and viscoelastic properties (storage, loss modulus, and tan δ ) were calculated from the constitutive equation. While obtaining polymer dynamics parameter of the molecular system, a relationship between self-diffusivity coefficient ( D c ) and the polymerization degree of the polymer was confirmed. Furthermore, a series of parametric studies showed that increase of the primitive path length (L) and decrease of D c have led to the strengthening of moduli and decrease of tan δ peak. Moreover, under the same condition, the shift of tan δ peak to low-frequency domain was observed, which implies a decline in free volume in the molecular system and an increase in the glass transition temperature.

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Section: Introductionmentioning

confidence: 99%

A molecular structure-informed viscoelastic constitutive model for natural rubber materials

Jung¹,

Park²,

Ryu³

et al. 2021

Funct. Compos. Struct.

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“…However, structural integrity of members and components made of multilayered systems strongly depends upon their delamination fracture behaviour. Delamination fracture, i.e., appearance of longitudinal cracks between layers, significantly reduces the load bearing capacity and may lead to catastrophic failure of the entire structure and, therefore, has to be accurately studied (Dolgov, 2005, 2016; Bensaid and Kerboua, 2017). Delamination fracture behaviour of multilayered systems has been investigated mainly by using various beam configurations containing a delamination crack (double cantilever beam, end-loaded split, end notched flexure, split cantilever beam and others).…”

Section: Introductionmentioning

confidence: 99%

Non-linear delamination in two-dimensional functionally graded multilayered beam

Rizov

2018

IJSI

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Purpose A delamination fracture analysis of two-dimensional functionally graded multilayered end-loaded split beam configuration with non-linear mechanical behaviour of material is conducted. The beam is made of an arbitrary number of longitudinal layers. Perfect adhesion between layers is assumed. The material is two-dimensional functionally graded in the cross-section of each layer. Also, each layer has individual thickness and material properties. A delamination crack is located arbitrary along the beam height. The paper aims to discuss these issues. Design/methodology/approach The delamination fracture behaviour is investigated analytically in terms of the strain energy release rate by analysing the balance of the energy. An additional analysis of the delamination fracture is performed by applying the J-integral approach for verification. Findings The solutions derived are used to evaluate the effects of crack location, material gradients and material non-linearity on the delamination fracture behaviour of end-loaded split beam. The effect of material gradient on the distribution of the J-integral value along the crack front is elucidated too. Originality/value Delamination in the multilayered functionally graded end-loaded split beam exhibiting non-linear mechanical behaviour of the material is analysed assuming that the material property is distributed non-linearly in both thickness and width directions in each layer.

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Improving joint performance through graded materials and geometries

Marques

Carbas

Akhavan‐Safar

et al. 2023

Advances in Structural Adhesive Bonding

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Interfacial stress analysis of functionally graded beams strengthened with a bonded hygrothermal aged composite plate

Cited by 6 publications

References 37 publications

A molecular structure-informed viscoelastic constitutive model for natural rubber materials

A molecular structure-informed viscoelastic constitutive model for natural rubber materials

Non-linear delamination in two-dimensional functionally graded multilayered beam

Improving joint performance through graded materials and geometries

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