Fibers networks as a new type of core material. Processing and mechanical properties
- PDF / 1,287,074 Bytes
- 6 Pages / 595 x 842 pts (A4) Page_size
- 74 Downloads / 221 Views
1188-LL02-02
Fibers networks as a new type of core material. Processing and mechanical properties Laurent Mezeix1, 2, Christophe Bouvet2, Serge Crézé3, Dominique Poquillon1 1 CIRIMAT, Université de Toulouse, INPT-ENSIACET, 118 route de Narbonne, 31077 Toulouse, France 2 LGMT, IGM, Université de Toulouse, LGMT, bât 3PN, 118 route de Narbonne, 31062, Toulouse, France 3 DMSM, Université de Toulouse, ISAE campus SUPAERO, 10 avenue Edouard Belin BP 54032, 31055, Toulouse, France
ABSTRACT Fibers networks materials have been elaborated from different fibers: metallic fibers, glass fibers and carbon fibers. Cross-links have been achieved using epoxy spraying. The scope of this paper is to analyze the mechanical behavior of these materials and to compare it with available models. The first part of this paper deals with elaboration of fibers network materials. In the second part, compression tests are performed. The specific mechanical behavior obtained is discussed.
INTRODUCTION Entangled materials can be made from natural materials (wool, cotton…) as well as artificial ones (steel wool, glass wool…). Bonded metal fibers network materials offer advantages [1-7] for use like heat exchanger [8] or insulation [9]. Indeed, they present a low relative density, high porosity and simplicity of production by cost-effective routes with considerable versatility concerning metal composition and network architecture. On the other hand, sandwich panel consists of two thin skins separated by a thick core. Core material is usually in the form of honeycomb, foam or balsa. Recently, a novel type of sandwich has been developed with bonded metallic fibers as core material [10-16]. This material presents an attractive combination of properties like high specific stiffness, good damping capacity and energy absorption. Metal fibers are bonded with a polymeric adhesive [15] or fabricated in a mat-like form and consolidated by solid state sintering [12,16]. Entangled cross-linked carbon fibers have been also studied for use as core material by Laurent Mezeix [17]. Indeed entangled cross-linked carbon fibers present many advantages for application as core material: open porosity, possibility to mix different fibers to optimize properties or possibility to reeve electric or control cables on core material. Only a few studies are devoted to the mechanical behavior of material made from entangled crosslinked fibers [16, 18]. In the present paper, fibers have been chosen in function of their nature, applications and costs. Due to their high performance, carbon fibers are intensely used in many applications: aeronautics, sport equipments or high performance vehicles. Because of their low cost, glass fibers are widely used in many applications like thermal insulation for pipe, building. Bonded metal fiber network are used as core material [10-16]. The purpose of the
present study is to analyze the mechanical behavior and to model the initial stiffness made from three types of cross-linked fibers.
EXPERIMENT Material elaboration Carbon fibers (200 Te
Data Loading...
