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

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F15%3A00240272" target="_blank" >RIV/68407700:21220/15:00240272 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

JI - Composite materials

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

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

Publication year

2015

Confidentiality

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