Investigation on bending moment capacity of corner joints constructed with spline under diagonal tension and compression

Document Type : Research Paper

Author

M.Sc., wood and paper science, Science and research branch, Islamic Azad university, Tehran, Iran

Abstract

This study was conducted to evaluate the effects of the penetration depths (8, 11, 14) and material types of spline (high density fiber board (HDF), plywood and hornbeam wood (Carpinus betulus)) composite material types (MDF and particleboard) on bending moment resistance of mitered L-type joints. In this research L-type joints fabricated with spline and PVA adhesive with dimensions 160 × 230 ×16 mm (Length × Width × Thickness respectively). Joints were fabricated tested by an Instron machine under tension and compression loading. The results have shown that the bending moment resistance of joints under compression was higher than those under tension. The lowest bending moment resistance under tension was seen in particleboard and plywood spline with 14 mm penetration depth while under compression it was seen in particleboard, and HDF spline with 11 mm penetration depth. The highest bending moment resistance under tension was seen in MDF, and plywood spline with 14 mm penetration depth while under compression it was seen in MDF, and HDF spline with 8 mm penetration depth.

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