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Anthony R. Bunsell - One of the best experts on this subject based on the ideXlab platform.
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Three-dimensional analysis of load transfer micro-mechanisms in fibre/matrix Composites
Composites Science and Technology, 2009Co-Authors: Sébastien Blassiau, Alain Thionnet, Anthony R. BunsellAbstract:This study gives a detailed analysis of load distributions around fibre breaks in a Composite. In contrast to other studies reported in the literature, the analysis considers different configurations of Composite Damage from the failure of a few to the failure of many fibres. The model considers three types of matrix behaviours (elastic, elastic–plastic and viscoelastic) with or without debonding at the broken fibre/matrix interface. In this way, the usual limitations of the finite element approach are overcome so as to take into account the number and interactions of broken fibres whilst maintaining an evaluation of the various fields (stresses in particular).
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Micromechanisms of load transfer in a unidirectional carbon fibre–reinforced epoxy Composite due to fibre failures. Part 1: Micromechanisms and 3D analysis of load transfer: The elastic case
Composite Structures, 2006Co-Authors: Sébastien Blassiau, Alain Thionnet, Anthony R. BunsellAbstract:This study gives a detailed analysis of load distributions around fibre breaks in a Composite and the mechanisms involved in load transfer. In contrast to other studies reported in the literature the analysis considers different configurations of Composite Damage from the failure of a few fibres to the failure of many. The model considers the elastic case with and without debonding at the broken fibre/matrix interface. In this way, the usual limitations of the finite element approach are overcome so as to take into account the numbers and interactions of broken fibres whilst maintaining an evaluation of the various fields involved, in particular the stress fields associated with fibre failures.
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Micromechanisms of load transfer in a unidirectional carbon fibre-reinforced epoxy Composite due to fibre failures. Part I : micromechanisms and 3 D analysis of load transfer : the elastic case
Composite Structures, 2006Co-Authors: Sébastien Blassiau, Alain Thionnet, Anthony R. BunsellAbstract:This study gives a detailed analysis of load distributions around fibre breaks in a Composite and the mechanisms involved in load transfer. In contrast to other studies reported in the literature the analysis considers different configurations of Composite Damage from the failure of a few fibres to the failure of many. The model considers the elastic case with and without debonding at the broken fibre/matrix interface. In this way, the usual limitations of the finite element approach are overcome so as to take into account the numbers and interactions of broken fibres whilst maintaining an evaluation of the various fields involved, in particular the stress fields associated with fibre failures.
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Micromechanisms of load transfer in a unidirectional carbon fibre-reinforced epoxy Composite due to fibre failures. Part II : influence of viscoelastic and plastic matrices on the mechanisms of load transfer
Composite Structures, 2006Co-Authors: Sébastien Blassiau, Alain Thionnet, Anthony R. BunsellAbstract:A local three-dimensional (3D) finite element analysis (FEA), of the mechanisms governing Composite Damage (in the region around a fibre break), has been carried out. The model considers viscoelastic and plastic matrix behaviours with and without debonding at the broken fibre/matrix interface. The finite element analysis has shown that even a simple viscoelastic law describing the behaviour of the epoxy resin leads to an increasing load on the neighbouring intact fibres, as a function of time. The plastic behaviour of the matrix has been shown to have consequences on reloading after unloading. In contrast to other studies reported in the literature, the calculations were carried out on different representative 3D unit cells, corresponding to different states of Composite Damage. In this way, the usual limitations of the finite element approach have been overcome as the number of fibres considered has not been restricted to only the fibres nearest to the broken fibre and the evaluation of the stress field is more accurate. This study follows a previous study (Part 1) which considered the behaviour of a unidirectional Composite consisting of both elastic fibres and matrix which is used to validate the approach taken in the present paper.
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Micromechanisms of load transfer in a unidirectional carbon fibre–reinforced epoxy Composite due to fibre failures. Part 2: Influence of viscoelastic and plastic matrices on the mechanisms of load transfer
Composite Structures, 2006Co-Authors: Sébastien Blassiau, Alain Thionnet, Anthony R. BunsellAbstract:A local three-dimensional (3D) finite element analysis (FEA), of the mechanisms governing Composite Damage (in the region around a fibre break), has been carried out. The model considers viscoelastic and plastic matrix behaviours with and without debonding at the broken fibre/matrix interface. The finite element analysis has shown that even a simple viscoelastic law describing the behaviour of the epoxy resin leads to an increasing load on the neighbouring intact fibres, as a function of time. The plastic behaviour of the matrix has been shown to have consequences on reloading after unloading. In contrast to other studies reported in the literature, the calculations were carried out on different representative 3D unit cells, corresponding to different states of Composite Damage. In this way, the usual limitations of the finite element approach have been overcome as the number of fibres considered has not been restricted to only the fibres nearest to the broken fibre and the evaluation of the stress field is more accurate. This study follows a previous study (Part 1) which considered the behaviour of a unidirectional Composite consisting of both elastic fibres and matrix which is used to validate the approach taken in the present paper.
Sébastien Blassiau - One of the best experts on this subject based on the ideXlab platform.
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Three-dimensional analysis of load transfer micro-mechanisms in fibre/matrix Composites
Composites Science and Technology, 2009Co-Authors: Sébastien Blassiau, Alain Thionnet, Anthony R. BunsellAbstract:This study gives a detailed analysis of load distributions around fibre breaks in a Composite. In contrast to other studies reported in the literature, the analysis considers different configurations of Composite Damage from the failure of a few to the failure of many fibres. The model considers three types of matrix behaviours (elastic, elastic–plastic and viscoelastic) with or without debonding at the broken fibre/matrix interface. In this way, the usual limitations of the finite element approach are overcome so as to take into account the number and interactions of broken fibres whilst maintaining an evaluation of the various fields (stresses in particular).
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Micromechanisms of load transfer in a unidirectional carbon fibre–reinforced epoxy Composite due to fibre failures. Part 1: Micromechanisms and 3D analysis of load transfer: The elastic case
Composite Structures, 2006Co-Authors: Sébastien Blassiau, Alain Thionnet, Anthony R. BunsellAbstract:This study gives a detailed analysis of load distributions around fibre breaks in a Composite and the mechanisms involved in load transfer. In contrast to other studies reported in the literature the analysis considers different configurations of Composite Damage from the failure of a few fibres to the failure of many. The model considers the elastic case with and without debonding at the broken fibre/matrix interface. In this way, the usual limitations of the finite element approach are overcome so as to take into account the numbers and interactions of broken fibres whilst maintaining an evaluation of the various fields involved, in particular the stress fields associated with fibre failures.
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Micromechanisms of load transfer in a unidirectional carbon fibre-reinforced epoxy Composite due to fibre failures. Part I : micromechanisms and 3 D analysis of load transfer : the elastic case
Composite Structures, 2006Co-Authors: Sébastien Blassiau, Alain Thionnet, Anthony R. BunsellAbstract:This study gives a detailed analysis of load distributions around fibre breaks in a Composite and the mechanisms involved in load transfer. In contrast to other studies reported in the literature the analysis considers different configurations of Composite Damage from the failure of a few fibres to the failure of many. The model considers the elastic case with and without debonding at the broken fibre/matrix interface. In this way, the usual limitations of the finite element approach are overcome so as to take into account the numbers and interactions of broken fibres whilst maintaining an evaluation of the various fields involved, in particular the stress fields associated with fibre failures.
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Micromechanisms of load transfer in a unidirectional carbon fibre-reinforced epoxy Composite due to fibre failures. Part II : influence of viscoelastic and plastic matrices on the mechanisms of load transfer
Composite Structures, 2006Co-Authors: Sébastien Blassiau, Alain Thionnet, Anthony R. BunsellAbstract:A local three-dimensional (3D) finite element analysis (FEA), of the mechanisms governing Composite Damage (in the region around a fibre break), has been carried out. The model considers viscoelastic and plastic matrix behaviours with and without debonding at the broken fibre/matrix interface. The finite element analysis has shown that even a simple viscoelastic law describing the behaviour of the epoxy resin leads to an increasing load on the neighbouring intact fibres, as a function of time. The plastic behaviour of the matrix has been shown to have consequences on reloading after unloading. In contrast to other studies reported in the literature, the calculations were carried out on different representative 3D unit cells, corresponding to different states of Composite Damage. In this way, the usual limitations of the finite element approach have been overcome as the number of fibres considered has not been restricted to only the fibres nearest to the broken fibre and the evaluation of the stress field is more accurate. This study follows a previous study (Part 1) which considered the behaviour of a unidirectional Composite consisting of both elastic fibres and matrix which is used to validate the approach taken in the present paper.
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Micromechanisms of load transfer in a unidirectional carbon fibre–reinforced epoxy Composite due to fibre failures. Part 2: Influence of viscoelastic and plastic matrices on the mechanisms of load transfer
Composite Structures, 2006Co-Authors: Sébastien Blassiau, Alain Thionnet, Anthony R. BunsellAbstract:A local three-dimensional (3D) finite element analysis (FEA), of the mechanisms governing Composite Damage (in the region around a fibre break), has been carried out. The model considers viscoelastic and plastic matrix behaviours with and without debonding at the broken fibre/matrix interface. The finite element analysis has shown that even a simple viscoelastic law describing the behaviour of the epoxy resin leads to an increasing load on the neighbouring intact fibres, as a function of time. The plastic behaviour of the matrix has been shown to have consequences on reloading after unloading. In contrast to other studies reported in the literature, the calculations were carried out on different representative 3D unit cells, corresponding to different states of Composite Damage. In this way, the usual limitations of the finite element approach have been overcome as the number of fibres considered has not been restricted to only the fibres nearest to the broken fibre and the evaluation of the stress field is more accurate. This study follows a previous study (Part 1) which considered the behaviour of a unidirectional Composite consisting of both elastic fibres and matrix which is used to validate the approach taken in the present paper.
Alain Thionnet - One of the best experts on this subject based on the ideXlab platform.
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Three-dimensional analysis of load transfer micro-mechanisms in fibre/matrix Composites
Composites Science and Technology, 2009Co-Authors: Sébastien Blassiau, Alain Thionnet, Anthony R. BunsellAbstract:This study gives a detailed analysis of load distributions around fibre breaks in a Composite. In contrast to other studies reported in the literature, the analysis considers different configurations of Composite Damage from the failure of a few to the failure of many fibres. The model considers three types of matrix behaviours (elastic, elastic–plastic and viscoelastic) with or without debonding at the broken fibre/matrix interface. In this way, the usual limitations of the finite element approach are overcome so as to take into account the number and interactions of broken fibres whilst maintaining an evaluation of the various fields (stresses in particular).
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Micromechanisms of load transfer in a unidirectional carbon fibre–reinforced epoxy Composite due to fibre failures. Part 1: Micromechanisms and 3D analysis of load transfer: The elastic case
Composite Structures, 2006Co-Authors: Sébastien Blassiau, Alain Thionnet, Anthony R. BunsellAbstract:This study gives a detailed analysis of load distributions around fibre breaks in a Composite and the mechanisms involved in load transfer. In contrast to other studies reported in the literature the analysis considers different configurations of Composite Damage from the failure of a few fibres to the failure of many. The model considers the elastic case with and without debonding at the broken fibre/matrix interface. In this way, the usual limitations of the finite element approach are overcome so as to take into account the numbers and interactions of broken fibres whilst maintaining an evaluation of the various fields involved, in particular the stress fields associated with fibre failures.
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Micromechanisms of load transfer in a unidirectional carbon fibre-reinforced epoxy Composite due to fibre failures. Part I : micromechanisms and 3 D analysis of load transfer : the elastic case
Composite Structures, 2006Co-Authors: Sébastien Blassiau, Alain Thionnet, Anthony R. BunsellAbstract:This study gives a detailed analysis of load distributions around fibre breaks in a Composite and the mechanisms involved in load transfer. In contrast to other studies reported in the literature the analysis considers different configurations of Composite Damage from the failure of a few fibres to the failure of many. The model considers the elastic case with and without debonding at the broken fibre/matrix interface. In this way, the usual limitations of the finite element approach are overcome so as to take into account the numbers and interactions of broken fibres whilst maintaining an evaluation of the various fields involved, in particular the stress fields associated with fibre failures.
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Micromechanisms of load transfer in a unidirectional carbon fibre-reinforced epoxy Composite due to fibre failures. Part II : influence of viscoelastic and plastic matrices on the mechanisms of load transfer
Composite Structures, 2006Co-Authors: Sébastien Blassiau, Alain Thionnet, Anthony R. BunsellAbstract:A local three-dimensional (3D) finite element analysis (FEA), of the mechanisms governing Composite Damage (in the region around a fibre break), has been carried out. The model considers viscoelastic and plastic matrix behaviours with and without debonding at the broken fibre/matrix interface. The finite element analysis has shown that even a simple viscoelastic law describing the behaviour of the epoxy resin leads to an increasing load on the neighbouring intact fibres, as a function of time. The plastic behaviour of the matrix has been shown to have consequences on reloading after unloading. In contrast to other studies reported in the literature, the calculations were carried out on different representative 3D unit cells, corresponding to different states of Composite Damage. In this way, the usual limitations of the finite element approach have been overcome as the number of fibres considered has not been restricted to only the fibres nearest to the broken fibre and the evaluation of the stress field is more accurate. This study follows a previous study (Part 1) which considered the behaviour of a unidirectional Composite consisting of both elastic fibres and matrix which is used to validate the approach taken in the present paper.
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Micromechanisms of load transfer in a unidirectional carbon fibre–reinforced epoxy Composite due to fibre failures. Part 2: Influence of viscoelastic and plastic matrices on the mechanisms of load transfer
Composite Structures, 2006Co-Authors: Sébastien Blassiau, Alain Thionnet, Anthony R. BunsellAbstract:A local three-dimensional (3D) finite element analysis (FEA), of the mechanisms governing Composite Damage (in the region around a fibre break), has been carried out. The model considers viscoelastic and plastic matrix behaviours with and without debonding at the broken fibre/matrix interface. The finite element analysis has shown that even a simple viscoelastic law describing the behaviour of the epoxy resin leads to an increasing load on the neighbouring intact fibres, as a function of time. The plastic behaviour of the matrix has been shown to have consequences on reloading after unloading. In contrast to other studies reported in the literature, the calculations were carried out on different representative 3D unit cells, corresponding to different states of Composite Damage. In this way, the usual limitations of the finite element approach have been overcome as the number of fibres considered has not been restricted to only the fibres nearest to the broken fibre and the evaluation of the stress field is more accurate. This study follows a previous study (Part 1) which considered the behaviour of a unidirectional Composite consisting of both elastic fibres and matrix which is used to validate the approach taken in the present paper.
Yi Bing Shi - One of the best experts on this subject based on the ideXlab platform.
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Damage mechanism characterization in Composite Damage tolerance investigations
Composite Structures, 1993Co-Authors: Derek Hull, Yi Bing ShiAbstract:Abstract The investigation of Damage tolerance of Composite materials comprises a spectrum of topics. A review of research in the area of Damage tolerance critically exposes the need to identify basic Damage mechanisms in order to develop more Damage-tolerant materials and structures. The importance of characterizing Damage mechanisms is emphasized and examples are given to illustrate the approaches which can be used. New results on the characterization of impact Damage in carbon fibre reinforced epoxy resin Composite laminates are presented. The discussion leads to the identification of a number of issues that require further research for the development of a mechanism-oriented rational Damage-tolerant design approach.
Philippe Boisse - One of the best experts on this subject based on the ideXlab platform.
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Textile Composite Damage Analysis Taking into Account the Forming Process
Materials, 2020Co-Authors: Marjorie Jauffret, Aldo Cocchi, Naïm Naouar, Christian Hochard, Philippe BoisseAbstract:The internal structure of Composite materials is modified during manufacturing. The formation of woven prepregs or dry preforms changes the angle between the warp and weft yarns. The Damage behaviour of the consolidated Composite is modified by these changes of angle. It is important when designing a Composite part to consider this modification when calculating the Damage in order to achieve a correct dimensioning. In this paper, a Damage calculation approach of the consolidated textile Composite that takes into account the change in orientation of the yarns due to forming is proposed. The angles after forming are determined by a simulation of the draping based on a hypoelastic behaviour of the woven fabric reinforcement. Two orthogonal frames based on the warp and weft directions of the textile reinforcement are used for the objective integration of stresses. Damage analysis of the cured woven Composite with non-perpendicular warp and weft directions is achieved by replacing it with two equivalent Unidirectional (UD) plies representing the yarn directions. For each ply, a model based on Continuum Damage Mechanics (CDM) describes the progressive Damage. Two examples are presented, a bias extension specimen and the hemispherical forming coupon. In both cases, the angles between the warp and weft yarns are changed. It is shown that the Damage calculated by taking into account these angle changes is greatly modified.