Development of Computational Models for Prediction of Mechanical Properties of Composite Materials and Their Utilization in Crash Applications

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Development of Computational Models for Prediction of Mechanical Properties of Composite Materials and Their Utilization in Crash Applications

Popis výsledku v původním jazyce

For decades the use of composite materials has been seen as a suitable way to produce lightweight constructions in the aerospace industry. It has also gained importance in the automotive industry, particularly after the European Commission announced in late 2006 that working on a proposal for legally binding measures and limits for CO2 emissions. Manufacturers realized the necessity for developing new body concepts, utilizing the knowledge of lightweight design and advanced computational tools with the objective of significant body mass reduction and consequent fulfilling of the CO2 limit. From this point of view the composites are very promising, but the state-of-the-art in the field of automotive design does not guarantee a feasible result without excessive mechanical testing on the level of coupons, subsystems and assemblies. In this work, a method of virtual testing and prediction of the mechanical properties of the 2D tri-axially braided composite (2DTBC) is introduced with goal to obtain main mechanical properties of various braid configurations without necessity to physically braid, form, impregnate and test them. The proposed method needs only knowledge of the mechanical properties of the constituents and the result of braiding (preform geometry). The behavior and response of the models in tension, compression, shear and axial impact was compared with measurements under the same load conditions, performed on the carbon-epoxy tri- axially braided flat or tubular laminates. Predicted properties serve as the input to the conventional multi-layered finite element material model of orthotropic material, allowing to analyze composite structures on the level of full-scale vehicle model in fields of stiffness, strength and crashworthiness.

Název v anglickém jazyce

Development of Computational Models for Prediction of Mechanical Properties of Composite Materials and Their Utilization in Crash Applications

Popis výsledku anglicky

For decades the use of composite materials has been seen as a suitable way to produce lightweight constructions in the aerospace industry. It has also gained importance in the automotive industry, particularly after the European Commission announced in late 2006 that working on a proposal for legally binding measures and limits for CO2 emissions. Manufacturers realized the necessity for developing new body concepts, utilizing the knowledge of lightweight design and advanced computational tools with the objective of significant body mass reduction and consequent fulfilling of the CO2 limit. From this point of view the composites are very promising, but the state-of-the-art in the field of automotive design does not guarantee a feasible result without excessive mechanical testing on the level of coupons, subsystems and assemblies. In this work, a method of virtual testing and prediction of the mechanical properties of the 2D tri-axially braided composite (2DTBC) is introduced with goal to obtain main mechanical properties of various braid configurations without necessity to physically braid, form, impregnate and test them. The proposed method needs only knowledge of the mechanical properties of the constituents and the result of braiding (preform geometry). The behavior and response of the models in tension, compression, shear and axial impact was compared with measurements under the same load conditions, performed on the carbon-epoxy tri- axially braided flat or tubular laminates. Predicted properties serve as the input to the conventional multi-layered finite element material model of orthotropic material, allowing to analyze composite structures on the level of full-scale vehicle model in fields of stiffness, strength and crashworthiness.

Druh

O - Ostatní výsledky

CEP obor

JI - Kompositní materiály

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2015

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů