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Analysis of resistance to axial withdrawal of screws embedded in locally reinforced MDF

Sydor M., Wołpiuk M.

Drewno : prace naukowe, doniesienia, komunikaty

2016

vol. 59, nr 196

173--182

This paper presents results of the analysis on screw withdrawal strength in locally reinforced MDF. Various amounts of the agent locally reinforcing the boards were applied and universal screws and euro screws were tested. Experiments were conducted using a universal strength testing machine, with samples collected following the guidelines of the ISO 27528:2009 standard. The following parameters were measured: 1) work required for maximum force, 2) maximum force, 3) withdrawal capacity and 4) stiffness. The research showed a 100% increase in resistance to axial withdrawal of universal screws and a 50% increase in euro screws in comparison to the analogous results for the non-reinforced board. Optimal amounts of the reinforcing agents were also determined.