Accelerated Measurement of the Long-Term Creep Behaviour of Plastics

Achereiner, Frédéric; Engelsing, Kurt; Bastian, Martin

doi:10.1007/978-3-319-41879-7_27

Cited by 5 publications

(4 citation statements)

References 11 publications

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“…Short-term observation done on a fiber reinforced composite at different temperatures allow the prediction of the long-term response. The studies use the time–temperature superposition principle (TTSP) [ 8 , 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Creep Response of Carbon-Fiber-Reinforced Composite Using Homogenization Method

Katouzian

Vlase

2021

Polymers

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The homogenization theory, used for the study of differential equations with periodic coefficients, with a rapid variation, is used in the paper for the analysis of the creep phenomenon of composite materials, reinforced with fibers. Generally, a polymer composite having a matrix with a viscoelastic response manifests a creep behavior. A good knowledge of mechanical constants allows us to predict the time response under the action of a load, which is important in engineering. The homogenization method is used to determine the engineering constants for a composite reinforced with carbon fibers. The method is applied for the particular case of fiber-reinforced unidirectional composites to obtain the equations that finally offer the required values. The epoxy matrix Fibredux 6376C is reinforced with carbon fibers T800 and the thermoplastic specimens made by APC2 material is reinforced with carbon fibers of the type IM6. The experimental results give a good concordance with the theoretical predictions.

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Section: Introductionmentioning

confidence: 99%

Creep Response of Carbon-Fiber-Reinforced Composite Using Homogenization Method

Katouzian

Vlase

2021

Polymers

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“…In this way, based on short-term measurements of the composite material at elevated temperature, the long-term response of the material can be predicted based upon the time-temperature superposition principle (TTSP) [10].…”

Section: Introductionmentioning

confidence: 99%

Creep Response of Neat and Carbon-Fiber-Reinforced PEEK and Epoxy Determined Using a Micromechanical Model

Katouzian

Vlase

2020

Symmetry

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A micromechanical model is developed to study the creep phenomena with neat and carbon-fiber-reinforced PEEK (Polyetheretherketon) and epoxy. The model considers that the continuous elastic circular fibers form a regular array inside the matrix material. In this study, the fibers are considered to be linear elastic and anisotropic, while the matrix has a nonlinear viscoelastic behavior. The approach describes the time-dependent response of unidirectional viscoelastic composites subjected to various types of loading conditions. A comparison between the finite element analysis and the proposed micromechanical model shows a good agreement. Experimental tests validate the results obtained using the proposed theoretical model.

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“…For example, in the cited paper, the case of an orthotropic composite and a transversely isotropic one is considered. Usually, such estimates, which consider particular cases of loading, are quite imprecise on certain ranges of component concentration [2][3][4][5]. Micromechanical models are mainly used to solve such problems.…”

Section: Introductionmentioning

confidence: 99%

Elastic Constants of Polymeric Fiber Composite Estimation Using Finite Element Method

Itu,

Scutaru,

Vlase

2024

Polymers

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Determining the properties of composite materials (knowing the properties of the component phases) is a primary objective in the design phase. Numerous methods have been developed to determine the elastic constants of a composite material. All these methods are laborious and require significant computing time. It is possible to make experimental measurements, but these too are expensive and time-consuming. In order to have a quick estimate of the value of the engineering constants of a new composite material (in our study a polymeric matrix reinforced with carbon fibers), this paper proposes a quick method for determining the homogenized material constants, using the finite element method (FEM). For this, the eigenfrequencies of a beam specimen manufactured by the studied composite material will be computed using FEM. The model will consider both phases of the composite, with the geometry and real size. The mechanical properties of the constituent’s material phases are known. With the help of this model, the torsional, longitudinal and transverse vibrations of the beam are studied. Based on the eigenvalues obtained by this calculation, it now is possible to quickly estimate the values of homogenized material constants required in the design. An example for a fiber-reinforced polymer composite material is provided in the paper.

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Accelerated Measurement of the Long-Term Creep Behaviour of Plastics

Cited by 5 publications

References 11 publications

Creep Response of Carbon-Fiber-Reinforced Composite Using Homogenization Method

Creep Response of Carbon-Fiber-Reinforced Composite Using Homogenization Method

Creep Response of Neat and Carbon-Fiber-Reinforced PEEK and Epoxy Determined Using a Micromechanical Model

Elastic Constants of Polymeric Fiber Composite Estimation Using Finite Element Method

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