| Titre : |
Sandwich design opens huge potential for lightweight engineering |
| Type de document : |
texte imprimé |
| Auteurs : |
Philipp Angst, Auteur ; Jürgen Emig, Auteur ; Mike Wienand, Auteur ; Pascal Albrecht, Auteur |
| Année de publication : |
2019 |
| Article en page(s) : |
p. 21-24 |
| Langues : |
Anglais (eng) |
| Catégories : |
Composites à fibres
Construction sandwich
Coût -- Contrôle
Fibres à orientation unidirectionnelle
Fibres continues
Hautes pressions
Matériaux -- Allègement
Matières plastiques dans les automobiles
Moulage par transfert de résine sous vide
|
| Index. décimale : |
668.4 Plastiques, vinyles |
| Résumé : |
The trend toward electromobility only reinforced it : lightweight engineering has long been the focus of the automotive industry. Lightweight engineering has two positive effects on the sustainability of vehicles. A lighter vehicle consumes less energy for acceleration and frictional resistance. Moreover, fewer raw materials are needed for production which is another positive contribution toward sustainable mobility. |
| Note de contenu : |
- Weight reduction with composite sandwich structures
- Weight and cost savings
- Established and cost-effective in large, global markets
- Example applications in series vehicles
- Sandwich manufacturing process
- The challenge of HP-RTM
- Short injection times allow the use of cost-effective rigid foams
- Process control based on the foam core's compressibility
- Optimum resin choice
- Successful test series
- Composite sandwiches are mature enough to significantly reduce a car's weight
- Fig. 1 : Different fibre reinforcements : oriented continuous fibres (tissue/scrim, UD) provide excellent mechanical properties (press process manufacturing
- Fig. 2 : Sandwich construction increases rigidity/stiffness at the same weight
- Fig. 3 : Increased core density over 0.1 kg/dm^3 hardly offers additional stiffness advantages
- Fig. 4 : With comparable stiffness and rigidity, the sandwich is much lighter, thus requiring fewer expensive raw materials. Thickness (height) is higher in the sandwich
- Fig. 5 : Pressure-time graph for a HP-RTM sandwich process showing the internal mould pressures, resin curing/viscosity at 100°C, and foam internal temperature
- Fig. 6 : Schematic curing behaviour of Loctite Max 2 at 70°C mold temperature
- Table 1 : Exemplary applications of sandwich designs in series production
- Table 2 : Overview and evaluation of FRP sandwich production processes
- Table 3 : Resin systems and processing parameters for manufacturing of HP-RTM sandwich parts |
| En ligne : |
https://drive.google.com/file/d/10LQ9B9nGj51l3R_TaLq9CebNIayHeoTd/view?usp=drive [...] |
| Format de la ressource électronique : |
pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31782 |
in JEC COMPOSITES MAGAZINE > N° 126 (01-02/2019) . - p. 21-24
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