Tensile properties and mechanism of laser-cut bamboo slivers

Abstract

This study aimed to evaluate the tensile properties and the failure mechanisms of bamboo slivers that were subjected to different methods of laser-cutting with changing parameters. The failure of the sample was observed through in situ tensile testing combined with scanning electron microscopy. The results indicated that laser-cutting could achieve high efficiency and minimal size variation in machining; however, the calculated sample size needed modification. When the laser power, cutting rate, and sample size were equal to 40 W, 5 mm x s-1, and 2 mm, respectively, the achieved tensile strength was 328.8 MPa, and the tensile modulus was 25.2 GPa. During testing, the surface of the laser-cut sample exhibited brittle fractures (with its interior typically damaged between the basic tissue and the fiber interface), fiber breakage, and fiber extraction.

Wood-based additive manufacturing: Current methodologies

“…These processes include extrusion-based fused filament fabrication (FFF), fused deposition modeling (FDM), large-scale pellet-fed systems, granular material bonding (selective laser sintering (SLS)), and liquid deposition modeling (LDM) (Gardner et al 2019). For large-scale manufacturing, the 3D printing methods can be divided into three general categories, namely Liquid Deposition Modelling (LDM) (Yao et al 2015), Individual Layer Fabrication (ILF) (Henke et al 2021), and Laser-cut Veneer Lamination (LcVL) (Zhang et al 2019). These AM processes could be alternative solutions to produce building structures, sound absorbers, and insulation panels.…”