EXPERIMENTAL STUDY OF MICROHOLE GROWTH AND COALFSCENCE IN DUCTILE MATERIALS

查看全文 作　　者：Bai Shulin Ni Shouyong Fang Jing (Department of Mechanics and Engineering Science,Peking University,Beijing 100871,China)

出　　处：《Acta Mechanica Solida Sinica》索引1999年第12卷第3期,共7页

摘　　要：The growth and coalescence of two microholes in copper foil were studied experimentally by in situ tensile tests under a,scanning electronic microscope.Two microholes of 15-35μm in di-ameter were arranged in different distances and orientations.It was found that the mechanisms of microhole evolution were represented by slipping band creation,and then crack initiation and propagationalong the slipping bands,in ligament.The process of microhole growth and coalescence was influencedby the inter-center distance and orientation of microholes.The critical surface of microholes at coales-cence is about 2—2.5 times that of the initial one.The variation of both the inter center distance andorientation depends on the initial angle. 关键词：microholes GROWTH and COALESCENCE EXPERIMENTAL study DUCTILE MATERIALS

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EXPERIMENTAL STUDY OF MICROHOLE GROWTH AND COALFSCENCE IN DUCTILE MATERIALS

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