naa a22 4500 510823092 CHVBK 20180411083543.0 cr unu---uuuuu 180411e20131201xx s 000 0 eng 10.1007/s12541-013-0283-8 doi (NATIONALLICENCE)springer-10.1007/s12541-013-0283-8 A numerical study on establishing the forming limit curve and indicating the formability of complex shape in incremental sheet forming process [Elektronische Daten] [Duc-Toan Nguyen, Young-Suk Kim] In order to obtain a final sound product by the incremental sheet forming (ISF) process for complex shape using cold rolled steel material, the limit curve based on the maximum wall angle versus maximum deformed height was established utilizing finite element method (FEM) simulations for several square shapes with various wall angles. The forming limit diagram (FLD) obtained from modified maximum force criterion (MMFC) was first used to predict ductile fracture of ISF simulation test and shown the inaccuracy when comparing with corresponding experimental results. The FLC at fracture (FLCF) curve regarding to tool dimension effects was then proposed, inputted to FEM simulation and approved in good agreement with experiment results. After that wall angle of square shapes was changed to verify its effect on fracture height of the square shapes and obtain the forming limit curve. Finally, wall angles with corresponding maximum deformed height of complex shapes were put into the obtained forming limit to investigate "fail” or "safe” shapes and validated by corresponding experiments. Korean Society for Precision Engineering and Springer-Verlag Berlin Heidelberg, 2013 FEM nationallicence MMFC nationallicence ISF nationallicence Forming limit diagram (FLD) nationallicence Formability nationallicence Nguyen Duc-Toan School of Mechanical Engineering, Hanoi University of Science and Technology, 1A-Dai Co Viet Street, Hai Ba Trung District, Hanoi City, Vietnam aut Kim Young-Suk Department of Mechanical Engineering, Kyungpook National University, 1370 Sangyeok, Buk-ku, 702-701, Daegu, Korea aut International Journal of Precision Engineering and Manufacturing Springer Berlin Heidelberg 14/12(2013-12-01), 2087-2093 2234-7593 14:12<2087 2013 14 12541 https://doi.org/10.1007/s12541-013-0283-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12541-013-0283-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Nguyen Duc-Toan School of Mechanical Engineering, Hanoi University of Science and Technology, 1A-Dai Co Viet Street, Hai Ba Trung District, Hanoi City, Vietnam aut NATIONALLICENCE 700 1- Kim Young-Suk Department of Mechanical Engineering, Kyungpook National University, 1370 Sangyeok, Buk-ku, 702-701, Daegu, Korea aut NATIONALLICENCE 773 0- International Journal of Precision Engineering and Manufacturing Springer Berlin Heidelberg 14/12(2013-12-01), 2087-2093 2234-7593 14:12<2087 2013 14 12541 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer