方向性気孔を持つポーラス金属の圧縮時における同時的なセル壁破断の抑制

抄録

Simultaneous cell wall fractures during compression of porous metals tend to cause the compressive stress drop. The objective of this study is to clarify the degree of regularity of pore arrangements that suppresses simultaneous cell wall fractures. Compression tests of porous metals with unidirectional through pores were performed with different interquartile ranges of the relative thickness (IQR) of the cell walls. As a result, the number of fractured cell walls decreased and the minimum compressive strain span between cell wall fractures increased with decreasing IQR. In addition, assuming that cell wall fractures progress from start to finish during a 3% increase in compressive strain, it was suggested that the IQR should be less than 0.6 to prevent simultaneous cell wall fractures.