STATIC PRESSURE TESTS AND THEORETICAL ANALYSIS FOR THE DIAMOND WIRE NETS WOVEN WITH HIGH-STRENGTH STEEL WIRE

To understand the mechanical properties of high-strength steel wire woven diamond mesh under vertical pressure and make full use of its role in bolt support metal mesh systems, a static pressure experimental scheme for the diamond wire nets with surrounding constraint conditions was designed, and vertical pressure tests for the diamond wire nets with different thicknesses and inscribed circle diameters were carried out. The results show that: the thickness of the diamond mesh has an impact on its vertical force and stiffness; the smaller the thickness, the greater the vertical ultimate force, and the greater the stiffness at the approximate linear segment; when the diameter of the inscribed circle of the diamond mesh decreases, the vertical force and the stiffness at the approximate linear segment of the diamond mesh increase. Based on the analysis of experimental phenomena and employing the homogenization simplification method for the confined plane-tensile mechanical properties of the diamond wire nets, a theoretical calculation formula for the static pressure load of the diamond mesh was deduced. Based on theoretical calculation formulas and flow chart, it can be better predicted the relationship between the vertical load and displacement of the diamond wire nets under static pressure force in different areas, which provides a reference for the design of diamond wire nets in bolt support metal mesh systems.