Structurally based constitutive model of epoxy adhesives incorporating the influence of post-curing and thermolysis

Młyniec, Andrzej; Korta, Jakub; Uhl, Tadeusz

doi:10.1016/j.compositesb.2015.09.062

Cited by 22 publications

(13 citation statements)

References 37 publications

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“…It means that the epoxy cubes are fully cured after being exposured at high temperatures. The post-curing process was documented in the recent work of Mlyniec et al[38].Elevated temperature facilitates the ring opening reactions and accelerates post-curing process. Post-curing results in increase of crosslink density and then affects the mechanical properties of epoxy resin.…”

mentioning

confidence: 97%

Accelerated thermal ageing of epoxy resin and 3-D carbon fiber/epoxy braided composites

Zhang

Sun

2016

Composites Part A: Applied Science and Manufacturing

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This paper reports the accelerated thermal ageing behaviors of pure epoxy resin and 3-D carbon fiber/epoxy braided composites. Specimens have been aged in air at 90 ℃, 110 ℃, 120 ℃, 130 ℃ and 180 ℃. Microscopy observations and attenuated total reflectance Fourier transform infrared spectrometry analyses revealed that the epoxy resin oxidative degradation only occurred within the surface regions. The surface oxidized layer protects inner resin from further oxidation. Both the resin degradation and resin stiffening caused by post-curing effects will influence the compression behaviors. For the braided composite, the matrix ageing is the main ageing mode at temperatures lower than glass transition temperatures (Tg) of the pure epoxy resin, while the fiber/matrix interface debonding could be observed at the temperatures higher than Tg, such as the temperature of 180 ℃. The combination of matrix degradation and fiber/resin interface cracking leads to the continuous reduction of compressive behaviors.

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confidence: 97%

Accelerated thermal ageing of epoxy resin and 3-D carbon fiber/epoxy braided composites

Zhang

Sun

2016

Composites Part A: Applied Science and Manufacturing

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“…Industrial usage of PLA could significantly reduce the problem of solid waste disposal but is still limited by its properties such as low strength and durability. Degradable polymeric materials are particularly sensitive to environmental factors such as temperature or humidity and are susceptible to accelerated degradation, which considerably alters their properties [4][5][6][7]. Degradation of PLA can also be influenced by the manufacturing process [8], which can cause molecular scission or a partial disappearance of the crystal structure [9].…”

Section: Introductionmentioning

confidence: 99%

Influence of density and environmental factors on decomposition kinetics of amorphous polylactide – Reactive molecular dynamics studies

Młyniec

Ekiert

Morawska-Chochół

et al. 2016

Journal of Molecular Graphics and Modelling

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“…It has been reported that the thermal treatment can help to modify the mechanical behavior of the polymeric materials. Post-curing and thermolysis are two competitive processes during temperature exposure [ 1 ]. The former one refers to the heat treatment above the glass transition temperature of a cured polymer, which can increase the degree of crosslinking by about 20–30% and elevate the stiffness as well as strength of the material.…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, the thermolysis is considered to appear along with the beginning of heat treatment process, which leads to the decrease in density of intramolecular crosslinks and reduce the shear modulus accordingly. Consequently, Mlyniec et al [ 1 ] presented a structurally based constitutive model, which took the influence of the post-curing as well as thermolysis process on stiffness of epoxy adhesives into account.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Behavior of Liquid Nitrile Rubber-Modified Epoxy Resin under Static and Dynamic Loadings: Experimental and Constitutive Analysis

Gao

et al. 2018

Materials

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Quasi-static and dynamic compression experiments were performed to study the influence of liquid nitrile rubber (LNBR) on the mechanical properties of epoxy resin. The quasi-static experiments were conducted by an electronic universal machine under strain rates of 0.0001/s and 0.001/s, while a Split Hopkinson Pressure Bar (SHPB) system was adopted to perform the dynamic tests for strain rates up to 5600/s. The standard Zhu-Wang-Tang (ZWT) nonlinear viscoelastic model was chosen to predict the elastic behavior of LNBR/epoxy composites under a wide range of strain rates. After some necessary derivation and data fitting, a set of model parameters for the tested materials were finally obtained. Meanwhile, the incremented form of the ZWT nonlinear viscoelastic model were deduced and implemented into the user material program of LS-DYNA. A simulation-test contrast had been performed to verify the validity and feasibility of the algorithm. The results showed that the viscoelastic behavior of epoxy resin can be effectively simulated.

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Structurally based constitutive model of epoxy adhesives incorporating the influence of post-curing and thermolysis

Cited by 22 publications

References 37 publications

Accelerated thermal ageing of epoxy resin and 3-D carbon fiber/epoxy braided composites

Accelerated thermal ageing of epoxy resin and 3-D carbon fiber/epoxy braided composites

Influence of density and environmental factors on decomposition kinetics of amorphous polylactide – Reactive molecular dynamics studies

Mechanical Behavior of Liquid Nitrile Rubber-Modified Epoxy Resin under Static and Dynamic Loadings: Experimental and Constitutive Analysis

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