Modelling of thermoplastic polymer failure in fiber reinforced composites

Fedulov, Boris; Safonov, Alexander; Кантор, М. М.; Lomov, Stepan Vladimirovitch

doi:10.1016/j.compstruct.2016.11.091

Cited by 20 publications

(11 citation statements)

References 27 publications

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“…where k 0 (units Pa) is an analogue to the yield limit in the case of von Mises plasticity ( f (ξ ) ≡ 1, and f (ξ ) determines the susceptibility of the material to the stress state type in case of plasticity initiation. In [6], it was shown that for PEEK thermoplastic material one can achieve good correlation with experimental data using linear variant of f (ξ ) 1 + Cξ , which is equivalent to well-known Drucker-Prager plasticity condition. The complete constitutive equations for plasticity modeling of PEEK material give a combination of associated flow plasticity with the corresponding equivalent plastic strain:…”

Section: Plasticity and Failure Criterionmentioning

confidence: 96%

“…According to work [6], plasticity and failure criteria are based on triaxiality parameter ξ σ /σ 0 , where σ σ ii /3,…”

Section: Plasticity and Failure Criterionmentioning

confidence: 99%

“…where σ pl t is an experimental tension stress. As a failure criterion in [6], a parameter based on equivalent plastic strain ε pl eq with special multiplier dependent on stress triaxiality was proposed:…”

Section: Plasticity and Failure Criterionmentioning

confidence: 99%

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Modeling of manufacturing of thermoplastic composites and residual stress prediction

Fedulov

2018

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The paper describes a model for simulation of residual stresses and process-induced cracks in thermoplastic fibre-reinforced composites. The main aspect of the research is the modeling of phase transitions in thermoplastic matrix, taking into account changes in the matrix mechanical properties and shrinkage. An experimental comparison of modeling results for all mechanical characteristics at all stages of material phase transformation is provided. Equations for modeling of all key processes related to temperature cycle of a thermoplastic matrix solidification are provided together with corresponding material constants, using polyetheretherketone (PEEK) as an example. Approach to modeling of process-induced defects in thermoplastic matrix in dependence of crystallinity degree and different temperature conditions is proposed. Russian Federation compliances J and J .where subscript am denotes amorphous state and subscript cr denotes fully crystallized state. Then, the following relationships are introduced:And the assumption is made that J cr J uc J cr 0 ψ arctg(ωτ ),

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Section: Plasticity and Failure Criterionmentioning

confidence: 96%

“…According to work [6], plasticity and failure criteria are based on triaxiality parameter ξ σ /σ 0 , where σ σ ii /3,…”

Section: Plasticity and Failure Criterionmentioning

confidence: 99%

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Modeling of manufacturing of thermoplastic composites and residual stress prediction

Fedulov

2018

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“…A thermoplastic polymer failure model of UD composites was developed 142 using standard FE software. The dependence of plastic behaviour and damage in the thermoplastic matrix on the type of stress state was modelled.…”

Section: Damage Modelling (Textile Short Fibre Reinforced Compositesmentioning

confidence: 99%

Contributions of Stepan V Lomov to the research and development of composite materials

Jain

Boisse

Carvelli

et al. 2020

Journal of Composite Materials

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This paper presents a comprehensive review of the scientific and engineering contributions of Prof. Stepan V. Lomov in a career spanning over 3 decades. Starting from his early work on the modelling of dry textiles, different aspects of composite materials have benefited from his inspiring contribution. His wide scientific curiosity drove the research on several topics, covering permeability, forming, damage, fatigue, nano-engineered composites, as well as development of analytical and numerical models at different scales. The paper presents a full spectrum of his scientific career aiming to link his achievements and the future research on composite materials.

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“…The maximum principal logarithmic strain was taken as a criterion to successfully appraise the pattern of fracture. Recently, Fedulov et al [ 10 ] characterized the damage accumulation of the polymer in dependence on the stress state type.…”

Section: Introductionmentioning

confidence: 99%

Applications of a Semi-Crystalline Thermoplastic Constitutive Model to Mechanical Responses of Electronic Connector Structures

Huang

Liao

2021

Materials

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The retention force of electronic connectors, in general one of the essential specification requirements, is defined as a maximum force of metallic terminals withdrawn out of the corresponding plastic housing. Accurate prediction of the retention force is an important issue in the connector design stage; however, it is not an easy task to accurately assess the retention force based on the authors’ knowledge. A finite element analysis is performed in conjunction with a self-coded user subroutine accounting for relaxation/creep behaviors of semi-crystalline thermoplastic polymers under various loading conditions in order to appraise the mechanical performance of the plastic base structure. Material parameters adopted in the constitutive model are evaluated by utilizing the automated design exploration and optimization commercial software. Applications of the developed subroutine with several damage criteria to assess retention forces of two electronic connectors were conducted. Retention forces predicted by utilizing the current constitutive model agreed fairly well with the associated experimental measurements. A dramatic improvement of the underestimation of the retention force based on the approach commonly adopted in the industry is also demonstrated here.

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Modelling of thermoplastic polymer failure in fiber reinforced composites

Cited by 20 publications

References 27 publications

Modeling of manufacturing of thermoplastic composites and residual stress prediction

Modeling of manufacturing of thermoplastic composites and residual stress prediction

Contributions of Stepan V Lomov to the research and development of composite materials

Applications of a Semi-Crystalline Thermoplastic Constitutive Model to Mechanical Responses of Electronic Connector Structures

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