Shang, X., Zhou, J., Zhuo, F., Luo, Y.
55754767700;56510510800;56567817700;55712634000;
Analysis of crack for complex structural parts and simulation optimization during hot forming
(2015) International Journal of Advanced Manufacturing Technology, 80 (1-4), pp. 373-382. 被引用 5 次.
https://www.scopus.com/inward/record.uri?eid=2-s2.0-84939259128&doi=10.1007%2fs00170-015-6990-9&partnerID=40&md5=904429b8d9dba627adbc552d6c4fe8e9

DOI: 10.1007/s00170-015-6990-9
归属机构: College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China
摘要: Based on the crack mechanism of hot forming, the causes of cracks occurring during the hot forming of complex structural parts were investigated in this study. High temperature flow stress model of ultrahigh strength steel (UHSS) BR1500HS was established using the true stress–strain curves of BR1500HS in high-temperature tensile. A finite element model (FEM) was built to investigate the causes of defects in hot forming, particularly the necking occurring at the end parts in plan stress status. Then, hot forming process and structure optimizing methods were proposed. According to the results of numerical simulation, it can be concluded that the indirect hot forming process can avoid forming defects and optimize preforming drawing height to 24.5 mm. Through changing the end size of blank to control the metal flow, crack occurring at the end of parts can be solved, since the material in two-way tensile stress state can flow compensation in one direction and therefore reduce the flow resistance. The experimental results are in good agreement with numerical simulation results, which indicates that the proposed method can avoid defects and meet the design requirements. © 2015, Springer-Verlag London.
作者关键字: Complex structural parts;  Crack;  Hot forming;  Multiobjective control
索引关键字: Cracks; Defects; Drawing (forming); High strength steel; Numerical methods; Numerical models; Preforming, Complex structural parts; High-temperature flows; High-temperature tensile; Hot forming; Multi-objective control; Simulation optimization; Structure optimizing; Ultra high strength steel, Finite element method
通讯地址: Zhou, J.; College of Materials Science and Engineering, Chongqing UniversityChina
出版商: Springer-Verlag London Ltd
ISSN: 02683768
CODEN: IJATE
原始文献语言: English
来源出版物名称缩写: Int J Adv Manuf Technol
文献类型: Article
来源出版物: Scopus