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选用H59黄铜为材料,制备了含圆形单孔、双孔、三孔以及四孔的圆柱体试样,采用型号为YE-600的液压式压力试验机对试样进行压缩试验,探讨了布孔方式对厚壁胞体多孔结构接触强度的影响;并用有限元法探讨了多孔结构的破坏机理.结果表明:双孔材料水平布孔方式优于垂直布孔方式;三孔材料斜正三角形布孔方式优于正三角形布孔方式;四孔材料正方形布孔方式优于菱形布孔方式;微孔分布半径的增大和微孔个数的增加均有助于提高厚壁胞体多孔结构的接触强度;裂纹萌生于微孔边缘且离初始接触点最近的地方,它由最大拉伸主应力引起并沿着微孔拉应力集中区进行扩展.
H59 brass was chosen as the material to prepare a cylindrical specimen with circular single hole, double hole, three holes and four holes. The compression test was carried out on the sample using a hydraulic pressure testing machine model YE-600 The influence of the hole pattern on the contact strength of the porous structure of the thick cell body was discussed. The failure mechanism of the porous structure was discussed by finite element method. The results showed that the horizontal hole pattern of the double hole material was better than the vertical hole pattern; Hole is superior to the method of equilateral triangle; the square hole pattern of four-hole material is better than that of rhombus hole pattern; the increase of the distribution radius of micro-holes and the increase of the number of micro-holes all contribute to the improvement of the contact strength Cracks originated at the edge of the microwell and nearest to the initial point of contact, which was caused by the maximum tensile principal stress and propagated along the micropore tensile stress concentration zone.