The effects of mechanical parameters of the stress–strain diagram on wood abrasion

Abstract

A wear test with abrasion was conducted for Hinoki cypress, Spruce and Agathis wood, and yield stress parameters on stress–strain diagrams were also extracted by mechanical tests. The relationship between the wear action and the mechanical parameters was investigated on the basis of the following extracted parameters of the yield stress, σ ylim, σ y3%, σ y0.2%, and σ ymax: σ ylim is the proportional limit stress, σ y3% is the stress determined generally by the 3% reduced modulus method for wood, σ y0.2% is the 0.2% proof stress adapted generally by other materials such as metal, and σ ymax is the maximum stress. The correlation coefficient in the relationship between the wear rate in the rubbed axial section and the yield stress parameter was higher in bending parallel to the sliding direction. The negative correlation was also higher in relation with the compression yield stress perpendicular to the sliding surface at the increase stage of plastic strain in the stress–strain diagram. Considering that bending includes the compression element in wood deformation, it was concluded that the wood mechanical parameter σ ymax of compression yield stress in maximum stress point for evaluating abrasive wear is the most important information in the stress–strain diagram.