Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 6    No. 3    September 1996

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CHARACTERISTICS OF CRITICAL STATE OF TENSILE INSTABILITY
Zhou Weixian

Department of Aeronautical Manufacturing Engineering,Northwestern Polytechnical University, Xi′an 710072

Abstract:The basic characteristics of strain state at the instant that the deformation of material element bearing every kind of tensile loading enters the instable phase from the stable deformation phase were analysed firstly by the principle of minimum strain energy. It was found that at this instant the strain path of this element is not monotonous. The original strain path ends at this moment and a new strain path begins and becomes effective at the same instant. These analyses indicate, from the physical concept, the scientific basis to distinguish the critical state of instability as well as the analysis method which should be adopted for the kind of problems of tensile instability.

 

Key words: tensile instability critical state deformation characteristic

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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