The Experts below are selected from a list of 660 Experts worldwide ranked by ideXlab platform
D Baptiste - One of the best experts on this subject based on the ideXlab platform.
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anisotropic strain rate effects on the fibre matrix interface decohesion in Sheet Moulding Compound composites
Composites Science and Technology, 2005Co-Authors: Z Jendli, Joseph Fitoussi, Fodil Meraghni, D BaptisteAbstract:Material and structure overall response vary significantly under rapid strain as compared to quasi-static loading. The strain rate sensitivity of a discontinuous fibre-reinforced composite was investigated. The composite material consists in a Sheet Moulding Compound (SMC-R26: weight content of 26%) with randomly oriented reinforcement. The specific aim of this study is to develop a multi-scale analyzed methodology in order to understand the physical origin of the strain rate effect. To this task, using a servohydraulic machine, monotonic and interrupted tensile tests were performed at different strain rates over a range from 2 x 10 -4 to 2 x 10 2 s -1 and coupled to scanning electronic microscope observations. The obtained results at macroscopic and the microscopic scale, have shown that SMC-R26 presents a visco-damageable behaviour: damage onset and kinetic are widely sensitive to the strain rate, whereas the load rate effect, if any, is insignificant on the elastic properties. It has been established that the material macroscopic response is widely governed by the fibre-matrix interface failure strength which increases significantly when increasing the strain rate. Moreover, through the analysis of the fibre orientation influence, we have demonstrated that the strain rate effects (a delayed damage onset and a slightly reduced damage accumulation kinetic) are more important when the fibre-matrix interfaces are submitted to a pure normal stress.
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Anisotropic strain rate effects on the fibre–matrix interface decohesion in Sheet Moulding Compound composites
Composites Science and Technology, 2005Co-Authors: Z Jendli, Joseph Fitoussi, Fodil Meraghni, D BaptisteAbstract:Material and structure overall response vary significantly under rapid strain as compared to quasi-static loading. The strain rate sensitivity of a discontinuous fibre-reinforced composite was investigated. The composite material consists in a Sheet Moulding Compound (SMC-R26: weight content of 26%) with randomly oriented reinforcement. The specific aim of this study is to develop a multi-scale analyzed methodology in order to understand the physical origin of the strain rate effect. To this task, using a servohydraulic machine, monotonic and interrupted tensile tests were performed at different strain rates over a range from 2 x 10 -4 to 2 x 10 2 s -1 and coupled to scanning electronic microscope observations. The obtained results at macroscopic and the microscopic scale, have shown that SMC-R26 presents a visco-damageable behaviour: damage onset and kinetic are widely sensitive to the strain rate, whereas the load rate effect, if any, is insignificant on the elastic properties. It has been established that the material macroscopic response is widely governed by the fibre-matrix interface failure strength which increases significantly when increasing the strain rate. Moreover, through the analysis of the fibre orientation influence, we have demonstrated that the strain rate effects (a delayed damage onset and a slightly reduced damage accumulation kinetic) are more important when the fibre-matrix interfaces are submitted to a pure normal stress.
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A statistical micromechanical model of anisotropic damage for S.M.C. composites
Composites Science and Technology, 1998Co-Authors: J. Fitoussi, G. Guo, D BaptisteAbstract:Abstract The objective of this paper is to predict the entire stress/ strain curves and the loss of stiffness with damage for Sheet-Moulding-Compound (SMC) composites. This is achieved by developing a statistical micro-macro relationship with the help of the model of Mori and Tanaka. In the case of an SMC composite with a 32% fiber volume fraction, debonding at the fiber/matrix interfaces is the predominant ‘microdamage’ mechanism. In order to relate the microstructure, and its local perturbations, to the macroscopic damaged behaviour, we introduce a statistical local damage criterion and the concept of the equivalent damaged inclusion in the micro-macro relationship of Mori and Tanaka. This paper shows the relationship between the statistical interface failure criterion and the scattering observed on the macroscopic mechanical test results.
Z Jendli - One of the best experts on this subject based on the ideXlab platform.
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anisotropic strain rate effects on the fibre matrix interface decohesion in Sheet Moulding Compound composites
Composites Science and Technology, 2005Co-Authors: Z Jendli, Joseph Fitoussi, Fodil Meraghni, D BaptisteAbstract:Material and structure overall response vary significantly under rapid strain as compared to quasi-static loading. The strain rate sensitivity of a discontinuous fibre-reinforced composite was investigated. The composite material consists in a Sheet Moulding Compound (SMC-R26: weight content of 26%) with randomly oriented reinforcement. The specific aim of this study is to develop a multi-scale analyzed methodology in order to understand the physical origin of the strain rate effect. To this task, using a servohydraulic machine, monotonic and interrupted tensile tests were performed at different strain rates over a range from 2 x 10 -4 to 2 x 10 2 s -1 and coupled to scanning electronic microscope observations. The obtained results at macroscopic and the microscopic scale, have shown that SMC-R26 presents a visco-damageable behaviour: damage onset and kinetic are widely sensitive to the strain rate, whereas the load rate effect, if any, is insignificant on the elastic properties. It has been established that the material macroscopic response is widely governed by the fibre-matrix interface failure strength which increases significantly when increasing the strain rate. Moreover, through the analysis of the fibre orientation influence, we have demonstrated that the strain rate effects (a delayed damage onset and a slightly reduced damage accumulation kinetic) are more important when the fibre-matrix interfaces are submitted to a pure normal stress.
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Anisotropic strain rate effects on the fibre–matrix interface decohesion in Sheet Moulding Compound composites
Composites Science and Technology, 2005Co-Authors: Z Jendli, Joseph Fitoussi, Fodil Meraghni, D BaptisteAbstract:Material and structure overall response vary significantly under rapid strain as compared to quasi-static loading. The strain rate sensitivity of a discontinuous fibre-reinforced composite was investigated. The composite material consists in a Sheet Moulding Compound (SMC-R26: weight content of 26%) with randomly oriented reinforcement. The specific aim of this study is to develop a multi-scale analyzed methodology in order to understand the physical origin of the strain rate effect. To this task, using a servohydraulic machine, monotonic and interrupted tensile tests were performed at different strain rates over a range from 2 x 10 -4 to 2 x 10 2 s -1 and coupled to scanning electronic microscope observations. The obtained results at macroscopic and the microscopic scale, have shown that SMC-R26 presents a visco-damageable behaviour: damage onset and kinetic are widely sensitive to the strain rate, whereas the load rate effect, if any, is insignificant on the elastic properties. It has been established that the material macroscopic response is widely governed by the fibre-matrix interface failure strength which increases significantly when increasing the strain rate. Moreover, through the analysis of the fibre orientation influence, we have demonstrated that the strain rate effects (a delayed damage onset and a slightly reduced damage accumulation kinetic) are more important when the fibre-matrix interfaces are submitted to a pure normal stress.
M R Schmidt - One of the best experts on this subject based on the ideXlab platform.
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hochfeste kunststoffstrukturen fahrzeugrader aus Sheet Moulding Compound smc
Materials Testing-Materials and Components Technology and Application, 2008Co-Authors: Andreas Buter, K Jaschek, Oliver Turk, M R SchmidtAbstract:KurzfassungFahrzeugrader sind hochstbeanspruchte Sicherheitskomponenten, deren Fertigungsqualitat regelmasig uberpruft und deren Betriebsfestigkeit experimentell nachgewiesen werden muss. Unsicherheiten bei der Ubertragung der fur Metall abgeleiteten Prufverfahren auf Kunststoffe, kombiniert mit der Tatsache, dass Kunststoffe im Vergleich zum Metall sehr unterschiedliche Versagensmechanismen aufweisen, sind Grund dafur, dass sich Kunststoffrader bisher noch nicht etablieren konnten. Daher soll hier auf der Basis erster experimenteller Untersuchungen an Pkw-Hybridradern mit Felgen aus faserverstarkten Kunststoffen gezeigt werden, wie uber die Eigenschaft der Schadenstoleranz ein Betriebsfestigkeitsnachweisversuch an Kunststoffradern durchgefuhrt werden konnte.
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Hochfeste Kunststoffstrukturen - Fahrzeugraeder aus Sheet Moulding Compound SMC / High Strength Plastic Structures - Vehicle Wheels Made of Sheet Moulding Compound SMC
MP MATERIALPRUEFUNG - MP MATERIALS TESTING, 2008Co-Authors: A Bueter, K Jaschek, O Tuerk, M R SchmidtAbstract:Fahrzeugraeder sind hoechstbeanspruchte Sicherheitskomponenten deren Fertigungsqualitaet regelmaessig ueberprueft und deren Betriebsfestigkeit experimentell nachgewiesen werden muss. Unsicherheiten bei der Uebertragung der fuer Metall abgeleiteten Pruefverfahren auf Kunststoffe, kombiniert mit der Tatsache, dass Kunststoffe im Vergleich zu Metall sehr unterschiedliche Versagensmechanismen aufweisen, sind Grund dafuer, dass sich Kunststoffraeder bisher noch nicht etablieren konnten. Daher soll hier auf der Basis erster experimenteller Untersuchungen an Pkw-Hybridraedern mit Felgen aus faserverstaerkten Kunststoffen gezeigt werden, wie ueber die Eigenschaft der Schadenstoleranz ein Betriebsfestigkeitsnachweisversuch an Kunststoffraedern durchgefuehrt werden koennte. (A) ABSTRACT IN ENGLISH: Vehicle Wheels are highly loaded safety relevant components. Their production quality has to be controlled regularly and their fatigue resistance has to be evaluated experimentally. Uncertainties in the transfer of test procedures developed for metallic materials to plastics, combined with the fact that plastics show quite different failure mechanisms compared to metals, are the reason that plastic wheels could not establish themselves up to now. First experimental investigations of automotive hybrid wheels with rims made of fibre-reinforced Compounds are showing in the present contribution how the fatigue resistance of plastic wheels can be approved using the property of failure tolerance. (A)
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hochfeste kunststoffstrukturen fahrzeugraeder aus Sheet Moulding Compound smc high strength plastic structures vehicle wheels made of Sheet Moulding Compound smc
MP MATERIALPRUEFUNG - MP MATERIALS TESTING, 2008Co-Authors: A Bueter, K Jaschek, O Tuerk, M R SchmidtAbstract:Fahrzeugraeder sind hoechstbeanspruchte Sicherheitskomponenten deren Fertigungsqualitaet regelmaessig ueberprueft und deren Betriebsfestigkeit experimentell nachgewiesen werden muss. Unsicherheiten bei der Uebertragung der fuer Metall abgeleiteten Pruefverfahren auf Kunststoffe, kombiniert mit der Tatsache, dass Kunststoffe im Vergleich zu Metall sehr unterschiedliche Versagensmechanismen aufweisen, sind Grund dafuer, dass sich Kunststoffraeder bisher noch nicht etablieren konnten. Daher soll hier auf der Basis erster experimenteller Untersuchungen an Pkw-Hybridraedern mit Felgen aus faserverstaerkten Kunststoffen gezeigt werden, wie ueber die Eigenschaft der Schadenstoleranz ein Betriebsfestigkeitsnachweisversuch an Kunststoffraedern durchgefuehrt werden koennte. (A) ABSTRACT IN ENGLISH: Vehicle Wheels are highly loaded safety relevant components. Their production quality has to be controlled regularly and their fatigue resistance has to be evaluated experimentally. Uncertainties in the transfer of test procedures developed for metallic materials to plastics, combined with the fact that plastics show quite different failure mechanisms compared to metals, are the reason that plastic wheels could not establish themselves up to now. First experimental investigations of automotive hybrid wheels with rims made of fibre-reinforced Compounds are showing in the present contribution how the fatigue resistance of plastic wheels can be approved using the property of failure tolerance. (A)
Fodil Meraghni - One of the best experts on this subject based on the ideXlab platform.
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anisotropic strain rate effects on the fibre matrix interface decohesion in Sheet Moulding Compound composites
Composites Science and Technology, 2005Co-Authors: Z Jendli, Joseph Fitoussi, Fodil Meraghni, D BaptisteAbstract:Material and structure overall response vary significantly under rapid strain as compared to quasi-static loading. The strain rate sensitivity of a discontinuous fibre-reinforced composite was investigated. The composite material consists in a Sheet Moulding Compound (SMC-R26: weight content of 26%) with randomly oriented reinforcement. The specific aim of this study is to develop a multi-scale analyzed methodology in order to understand the physical origin of the strain rate effect. To this task, using a servohydraulic machine, monotonic and interrupted tensile tests were performed at different strain rates over a range from 2 x 10 -4 to 2 x 10 2 s -1 and coupled to scanning electronic microscope observations. The obtained results at macroscopic and the microscopic scale, have shown that SMC-R26 presents a visco-damageable behaviour: damage onset and kinetic are widely sensitive to the strain rate, whereas the load rate effect, if any, is insignificant on the elastic properties. It has been established that the material macroscopic response is widely governed by the fibre-matrix interface failure strength which increases significantly when increasing the strain rate. Moreover, through the analysis of the fibre orientation influence, we have demonstrated that the strain rate effects (a delayed damage onset and a slightly reduced damage accumulation kinetic) are more important when the fibre-matrix interfaces are submitted to a pure normal stress.
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Anisotropic strain rate effects on the fibre–matrix interface decohesion in Sheet Moulding Compound composites
Composites Science and Technology, 2005Co-Authors: Z Jendli, Joseph Fitoussi, Fodil Meraghni, D BaptisteAbstract:Material and structure overall response vary significantly under rapid strain as compared to quasi-static loading. The strain rate sensitivity of a discontinuous fibre-reinforced composite was investigated. The composite material consists in a Sheet Moulding Compound (SMC-R26: weight content of 26%) with randomly oriented reinforcement. The specific aim of this study is to develop a multi-scale analyzed methodology in order to understand the physical origin of the strain rate effect. To this task, using a servohydraulic machine, monotonic and interrupted tensile tests were performed at different strain rates over a range from 2 x 10 -4 to 2 x 10 2 s -1 and coupled to scanning electronic microscope observations. The obtained results at macroscopic and the microscopic scale, have shown that SMC-R26 presents a visco-damageable behaviour: damage onset and kinetic are widely sensitive to the strain rate, whereas the load rate effect, if any, is insignificant on the elastic properties. It has been established that the material macroscopic response is widely governed by the fibre-matrix interface failure strength which increases significantly when increasing the strain rate. Moreover, through the analysis of the fibre orientation influence, we have demonstrated that the strain rate effects (a delayed damage onset and a slightly reduced damage accumulation kinetic) are more important when the fibre-matrix interfaces are submitted to a pure normal stress.
Joseph Fitoussi - One of the best experts on this subject based on the ideXlab platform.
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anisotropic strain rate effects on the fibre matrix interface decohesion in Sheet Moulding Compound composites
Composites Science and Technology, 2005Co-Authors: Z Jendli, Joseph Fitoussi, Fodil Meraghni, D BaptisteAbstract:Material and structure overall response vary significantly under rapid strain as compared to quasi-static loading. The strain rate sensitivity of a discontinuous fibre-reinforced composite was investigated. The composite material consists in a Sheet Moulding Compound (SMC-R26: weight content of 26%) with randomly oriented reinforcement. The specific aim of this study is to develop a multi-scale analyzed methodology in order to understand the physical origin of the strain rate effect. To this task, using a servohydraulic machine, monotonic and interrupted tensile tests were performed at different strain rates over a range from 2 x 10 -4 to 2 x 10 2 s -1 and coupled to scanning electronic microscope observations. The obtained results at macroscopic and the microscopic scale, have shown that SMC-R26 presents a visco-damageable behaviour: damage onset and kinetic are widely sensitive to the strain rate, whereas the load rate effect, if any, is insignificant on the elastic properties. It has been established that the material macroscopic response is widely governed by the fibre-matrix interface failure strength which increases significantly when increasing the strain rate. Moreover, through the analysis of the fibre orientation influence, we have demonstrated that the strain rate effects (a delayed damage onset and a slightly reduced damage accumulation kinetic) are more important when the fibre-matrix interfaces are submitted to a pure normal stress.
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Anisotropic strain rate effects on the fibre–matrix interface decohesion in Sheet Moulding Compound composites
Composites Science and Technology, 2005Co-Authors: Z Jendli, Joseph Fitoussi, Fodil Meraghni, D BaptisteAbstract:Material and structure overall response vary significantly under rapid strain as compared to quasi-static loading. The strain rate sensitivity of a discontinuous fibre-reinforced composite was investigated. The composite material consists in a Sheet Moulding Compound (SMC-R26: weight content of 26%) with randomly oriented reinforcement. The specific aim of this study is to develop a multi-scale analyzed methodology in order to understand the physical origin of the strain rate effect. To this task, using a servohydraulic machine, monotonic and interrupted tensile tests were performed at different strain rates over a range from 2 x 10 -4 to 2 x 10 2 s -1 and coupled to scanning electronic microscope observations. The obtained results at macroscopic and the microscopic scale, have shown that SMC-R26 presents a visco-damageable behaviour: damage onset and kinetic are widely sensitive to the strain rate, whereas the load rate effect, if any, is insignificant on the elastic properties. It has been established that the material macroscopic response is widely governed by the fibre-matrix interface failure strength which increases significantly when increasing the strain rate. Moreover, through the analysis of the fibre orientation influence, we have demonstrated that the strain rate effects (a delayed damage onset and a slightly reduced damage accumulation kinetic) are more important when the fibre-matrix interfaces are submitted to a pure normal stress.
