Experimental and numerical determination of adhesive strength in semi-rigid multi-layer polymeric systems

Molero, Glendimar; Du, Shuoran; Mamak, Marc; Agerton, Mark; Hossain, Mohammad Motaher; Sue, Hung‐Jue

doi:10.1016/j.polymertesting.2019.01.012

Cited by 59 publications

(24 citation statements)

References 29 publications

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“…Mesh sensitivity analysis was done for model calibration using stress and deformation as the output parameters. After iterative element size optimisation, when less than 5 % change in the output parameters was observed irrespective of the element size, the meshing criteria were finalised for all specimens as shown in Table 4 [7,8,18,19]. Figure 3 represents the meshing and boundary conditions of the tensile specimen.…”

Section: Meshingmentioning

confidence: 99%

Three-dimensional modelling of tensile behaviour for standard aluminium specimens

Toor¹

2023

tribomat

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The effect of specimen width and incorporation of a circular hole on the tensile behaviour of commercially available aluminium alloy AA 1100 was studied using finite element analysis (FEA) for convergence with the already published experimental work of other researchers. Static structural analysis was conducted to simulate tensile loading of Japanese industrial standard (JIS) specimen JIS Z 2201 No. 13B and No. 5 until the point of the ultimate tensile strength (UTS) was reached. A strain rate of 0.25 mm/s was used for both the neat specimen and the one bearing a circular hole of 8 mm in diameter at the centre of the specimen. The numerical results exhibited a good agreement with the experimental work by comparison of the percentage elongation for numerical and experimental data. The normal stresses calculated using analytical and numerical approaches also reflected a good convergence. For neat specimens of JIS Z 2201 No. 13B and No. 5, a 100 % increase in specimen width enhanced the load required to reach UTS by 100 %, while elongation was increased by 30 %. On the other hand, for specimens of JIS Z 2201 No. 13B and No. 5, bearing an 8 mm circular hole reduced the load required to reach UTS by 300 %, while elongation was only increased by 25 %. The 200 % decrease in load required to reach UTS and 57 % reduction in elongation was observed by incorporating an 8 mm circular hole in the neat specimens.

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Section: Meshingmentioning

confidence: 99%

Three-dimensional modelling of tensile behaviour for standard aluminium specimens

Toor¹

2023

tribomat

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“…Several in-depth studies noted that the scratch behavior of multilayer polymer systems depends on the interfacial properties to some extent [ 26 , 27 ]. Some researchers focused on the trigger factors of interlaminar failure by analyzing the interfacial stress distribution at the onset of interfacial damage, without modeling the actual scratch-induced delamination process [ 28 , 29 , 30 ].…”

Section: Introductionmentioning

confidence: 99%

Effects of Interlaminar Failure on the Scratch Damage of Automotive Coatings: Cohesive Zone Modeling

et al. 2023

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Interlaminar failure caused by scratches is a common damage mode in automotive coatings and is considered the potential trigger for irreversible destruction, i.e., plowing. This work strives to numerically investigate the mechanisms responsible for the complex scratch behavior of an automotive coating system, considering the interfacial failure. A finite element model is developed by incorporating a large deformation cohesive zone model for scratch-induced debonding simulation, where the mass scaling technique is utilized to minimize computational burden while ensuring accuracy. The delamination phenomenon of the automotive coating is reproduced, and its effects on scratch damage behavior are analyzed. Accordingly, it is revealed that the interlaminar delamination would produce significant stress redistribution, which leads to brittle and ductile damage of the coating and consequently affects the formation of plowing. Eventually, parametric studies on the effects of interfacial properties are performed. They demonstrate that the shear strength and shear fracture energy dominate scratch-induced delamination.

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“…A large volume of research has shown that scratch on polymeric multilayer systems may not only damage the top layer surface but also cause delamination between the polymeric layers underneath [ 1,2 ] due to the extremely high interfacial stresses exerted during scratching. [ 3 ] It has been found that the resistance to scratch‐induced delamination and the interfacial failure mode in various types of polymeric laminates can be different. [ 4,5 ] For example, it has been shown that Mode I dominant delamination occurred on epoxy‐coated steel.…”

Section: Introductionmentioning

confidence: 99%

“…[ 6 ] A mixed‐mode delamination was observed between the blow‐molded top polyethylene terephthalate layer and the adjacent nylon layer. [ 3 ] The dominance in delamination mode and delamination resistance is often attributed to the constitutive properties and the respective thickness of each layer.…”

Section: Introductionmentioning

confidence: 99%

“…[ 2,17,18 ] It has been shown that the base layer polymer thickness and constitutive behaviors are equally important in affecting the delamination behavior. [ 3,5 ] For example, a blow‐molded tri‐layer polymeric system with a PET base layer exhibits a higher delamination resistance than that with a nylon base layer even though the top layer of both laminates is the same. [ 3 ] Therefore, it is necessary to carry out a comprehensive study to understand how the delamination between the polymeric laminates is influenced by both top and base layer thicknesses and constitutive properties.…”

Section: Introductionmentioning

confidence: 99%

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Experimental observation and finite element method modeling on scratch‐induced delamination of multilayer polymeric structures

Zhu

Liu

et al. 2021

Polymer Engineering & Sci

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Scratches that result in delamination are common in multilayer polymeric laminates and coatings. In this study, the adhesive failure among a set of model double‐layer epoxy coatings was experimentally investigated and numerically analyzed using the finite element method modeling based on the maximum principal stress criterion. The adhesive failure on the model epoxy coatings was generated using an ASTM‐standard linearly increasing normal load scratch test. The parametric study reveals that delamination may initiate at locations underneath both scratch shoulder and behind scratch tip during scratching. It is also found that the magnitude and direction of peak tensile maximum principal stress developed at the interface are affected by both the laminate thickness and the material parameters of each layer. The parametric analysis shows that the onset of delamination can be delayed by possessing a softer base layer, a top or base layer with a higher yield stress, a base layer with a lower strain‐hardening slope, and a lower surface coefficient of friction. The Mode I delamination at the interface will become dominant in a multilayer system when the base layer has a higher modulus and a lower strain hardening slope. The usefulness of the present study for determining the delamination resistance of multilayer polymeric laminates and coatings is discussed.

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Experimental and numerical determination of adhesive strength in semi-rigid multi-layer polymeric systems

Cited by 59 publications

References 29 publications

Three-dimensional modelling of tensile behaviour for standard aluminium specimens

Three-dimensional modelling of tensile behaviour for standard aluminium specimens

Effects of Interlaminar Failure on the Scratch Damage of Automotive Coatings: Cohesive Zone Modeling

Experimental observation and finite element method modeling on scratch‐induced delamination of multilayer polymeric structures

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