Lade...
Journal Title
Composite Structures
2 Ergebnisse
Filter
Einstellungen
Gerade angezeigt 1 - 2 von 2
- Some of the metrics are blocked by yourconsent settings
Item-typ:Veröffentlichung, Adhesively- and hybrid- bonded joining of basalt and carbon fibre reinforced polybenzoxazine-based compositesPolybenzoxazines-based composites are an excellent alternative in lightweight design due to their outstanding properties in terms of chemical stability, inherent flame resistance, as well as mechanical performance. The present work provides an investigation of different joining techniques for polybenzoxazine-based composites, namely adhesively - and hybrid bonded joining. The effects of fibre reinforcement (carbon or basalt), and substrate thickness (2 or 3 mm) on the lap-shear strength of joints are taken into consideration. Here, basalt (BFRP) and carbon fibre reinforced plastics (CFRP) were manufactured by vacuum infusion technique followed by a convection oven curing. Mechanical characterisation of substrates included tensile and interlaminar shear strength testing. Hybrid joints were fabricated by rivet insertion in cured joints bonded with a structural adhesive. Adhesive bonding showed to be a proper joining technique presenting a good adhesion with substrates, and adequate cohesive strength. Hybrid bonded joints had a fail-safe fracture and higher energy absorption prior to failure than their adhesively bonded counterparts. No effect of substrate thickness on lap-shear strength was observed. The dominating failure mechanism for the joints was the delamination of the topmost-layer due to peel stresses. CFRP joints exhibited higher lap-shear strength than BFRP joints, which was consistent with interlaminar shear strength results.Wissenschaftlicher ArtikelBand:23659 27 - Some of the metrics are blocked by yourconsent settings
Item-typ:Veröffentlichung, Manufacturing of flax- and glass-fibre reinforced thin-walled tubes and measuring their interlaminar shear properties by torsion testsRecently, methods for determining interlaminar shear properties have been continuously developed to achieve homogeneous stress states and avoid edge effects. In this regard, the torsion test on tube specimens represents a setup with many advantages. Therefore, fibre composites made by a winding of glass and flax fibres were produced at a new type of mandrel, resulting in tubes with a wall thickness between 370 µm (glass) and 640 µm (flax). A new method for determining the shear strain is described in the context of the torsion test. The results are in line with analogous investigations, proving the validity of the new methodology.Wissenschaftlicher ArtikelHeft:319113