Plastic wrinkling prediction in thin-walled part forming process: A review  

作　　者：Liu Nan Yang He Li Heng Yan Siliang 

机构地区：[1]State Key Laboratory of Solidification Processing, School of Materials Science and Engineering,Northwestern Polytechnical University

出　　处：《Chinese Journal of Aeronautics》2016年第1期1-14,共14页中国航空学报（英文版）

基　　金：the National Natural Science Foundation of China(Nos.5090514451275415);National Basic Research Program of China(No.2010CB731701);Program for New Century Excellent Talents in University,Fundamental Research Funds for the Central Universities(3102014KYJD001)of China;the EU Marie Curie Actions–Mat Pro Future Project(FP7-PEOPLE-2012-IRSES-318968)of China;the‘‘111"Project(B08040)of China for the support to this research

摘　　要：The precision forming of thin-walled components has been urgently needed in aviation and aerospace field. However, the wrinkling induced by the compressive instability is one of the major defects in thin-walled part forming. The initiation and growth of the wrinkles are interac- tively affected by many factors such as stress states, mechanical properties of the material, geometry of the workpiece and boundary conditions. Especially when the forming process involves compli- cated boundary conditions such as multi-dies constrains, the perturbation of clearances between workpiece and dies and the contact conditions changing in time and space, etc., the predication of the wrinkling is further complicated. In this paper, the cu.rent prediction methods were summa- rized including the static equilibrium method, the energy method, the initial imperfection method, the eigenvalue buckling analysis method, the static-implicit finite element method and the dynamic- explicit finite element method. Then, a systematical comparison and summary of these methods in terms of their advantages and limitations are presented. By using a combination of explicit FE method, initial imperfection and energy conservation, a hybrid method is recommended to predict plastic wrinkling in thin-walled part forming. Finally, considering the urgent requirements of com- plex thin-walled structures＇ part in aviation and aerospace field, the trends and challenges in wrin- kling prediction under complicated boundary conditions are presented.The precision forming of thin-walled components has been urgently needed in aviation and aerospace field. However, the wrinkling induced by the compressive instability is one of the major defects in thin-walled part forming. The initiation and growth of the wrinkles are interac- tively affected by many factors such as stress states, mechanical properties of the material, geometry of the workpiece and boundary conditions. Especially when the forming process involves compli- cated boundary conditions such as multi-dies constrains, the perturbation of clearances between workpiece and dies and the contact conditions changing in time and space, etc., the predication of the wrinkling is further complicated. In this paper, the cu.rent prediction methods were summa- rized including the static equilibrium method, the energy method, the initial imperfection method, the eigenvalue buckling analysis method, the static-implicit finite element method and the dynamic- explicit finite element method. Then, a systematical comparison and summary of these methods in terms of their advantages and limitations are presented. By using a combination of explicit FE method, initial imperfection and energy conservation, a hybrid method is recommended to predict plastic wrinkling in thin-walled part forming. Finally, considering the urgent requirements of com- plex thin-walled structures＇ part in aviation and aerospace field, the trends and challenges in wrin- kling prediction under complicated boundary conditions are presented.

关 键 词：Explicit algorithm Hybrid method IMPERFECTIONS Implicit algorithm Thin-walled part forming WRINKLING 

分 类 号：V261[航空宇航科学与技术—航空宇航制造工程]