燕山大学学报2017，Vol.41Issue(6)：510-515,6.DOI:10.3969/j.issn.1007-791X.2017.06.005
基于管材缩径工艺的薄壁件成形起皱失稳共性规律研究
Study on common rules in wrinkling instability of thin-walled parts forming based on tube outer pressure compression technology
摘要
Abstract
Hollow thin-walled parts is a kind of hollow light structure which is more and more favourate in new and high technology engineering field. The main quality problem in the thin-walled parts forming is the wrinkling buckling problem. Therefore, the hollow thin-walled plastic instability wrinkling prediction research is extremely important. Based on the status about test method and theoretical research of wrinkling instability about thin-wall parts forming, the tube outer pressure compression forming are selected to study the common rules in wrinkling buckling. The analytical formulas are obtained by solving the equilibrium differential equations established at the moment of tube buckling with certain wrinkle morphology under the external pressure condition. The distribution characteristics of main critical buckling strains are analyzed by combining the plastic forming theory with the wrinkling instability theory; also the influences of the forming conditions and material property to the wrinkle-resistance property are discussed.The effect weight of each parameter is determined finally through the tube outer pressure compression forming process test. Through the theory and experiment analysis of this paper, it is known that the effect weight of plastic tangent modulus which includes the coefficient of intensification and hardening index to wrinkle-resistance property is larger than that of yield stress to the wrinkle-resistance property of tube.关键词
薄壁件/起皱失稳共性规律/管材缩径Key words
hollow thin-walled parts/wrinkling instability common rules/tube outer pressure compression forming分类
矿业与冶金引用本文复制引用
杜冰,关风龙,张鑫,谢军,赵长财..基于管材缩径工艺的薄壁件成形起皱失稳共性规律研究[J].燕山大学学报,2017,41(6):510-515,6.基金项目
国家自然科学基金资助项目(51605420) （51605420）
燕山大学博士基金资助项目(B935) （B935）
