چکیده مقاله
In spite of the fact that the experimental results indicate the significant effect of strain rate on forming limits of sheets, this effect is neglected in all theoretical methods of prediction of Forming Limit Diagrams FLDs The purpose of this paper is to modify the most renowned theoretical method of determination of FLDs M K model so as to be able to take into account the effect of strain rate To achieve this aim, the traditional assumption of preexistence of an initial geometrical inhomogeneity in the sheet has been replaced with the assumption of a preexisting material inhomogeneity It has been shown that using this assumption, the strain rate would not be omitted from equations; thus it is possible to demonstrate its effect on FLDs To validate the results, they are compared with some experimental data The good agreement between the theoretical and experimental results shows capabilities of the proposed method in predicting the effect of strain rate on FLDs
کلیدواژهها
نویسندگان
Ahmad Assempour
Center of Excellence in Design, Robotics and Automation, Department of Mechanical Engineering, Sharif University of Technology, Azadi Avenue, Tehran, Iran
Amir Ghazanfari
Center of Excellence in Design, Robotics and Automation, Department of Mechanical Engineering, Sharif University of Technology, Azadi Avenue, Tehran, Iran
شیوه ارجاع
Assempour, Ahmad and Ghazanfari, Amir,1390,A Theoretical Study on the Effect of Strain Rate on Forming Limit Diagrams,12th Iranian Conference on Manufacturing Engineering (ICME 2010),Tehran
ارائهشده در
مجموعه مقالات دوازدهمین کنفرانس ملی مهندسی ساخت و تولید ایران6 دی 1390 · تهران