Densification behavior of iron powder under cold stepped compaction was studied. Experimental data were also obtained for iron powder under cold stepped compaction. The elastoplastic constitutive equation based on the yield function of Shima and Oyane was implemented into a finite element program (ABAQUS) to simulate compaction responses of iron powder during cold stepped compaction. Finite element results were compared with experimental data for densification, deformed geometry and density distribution.

자나방과(科)의 5종(種): 우수리가지나방, Mefeima mediorufa gilva D., 황갈물결자나방, Idiotephria evanescens(S.), 줄점물결자나방, I. debilitata(L.), 각시애기자나방, Scopula modicaria(L.), 노랑띠각시자나방, Polythrena coloraria H.S 등이 우리나라에서는 처음으로 보고되었으며 그외 과거 북한 등지에서 기록되어 왔으나 표본확인이 되지 않았던 8종이 함께 채집 확인되었다.