چکیده مقاله
An exact analytical solution for springback due to variable stretch bending of beams and plates is presented Three types of materials are investigated, elastic perfectly plastic EPP , elastic linear work hardening ELWH and elastic exponential work hardening EEWH The variation of the applied bending moment with the axial force for the fully elastic, elastic plastic and fully plastic cases for cantilever beam is studied analytically It was found that the curvature, slope, deflection and final deflection for ELWH is greater than that for EEWH and smaller than that for EPP material, and the springback ratio is smaller than that for EEWH materials and greater than that for EPP material The presented model was modified to evaluate the springback of flat rectangular plates and circular blanks formed by a hemispherical punch and die It was found that the curvature increases as the thickness increases for different materials, and that stretching increases as the blank radius increases and/or as thickness decreases Comparisons with published work for the case of axis symmetric stretch bending and plane strain sheet bending are presented It was found that the proposed mechanism provided acceptable predictions of springback due to stretch bending of work hardening materials for all possible stretch bending combinations, for different stress conditions and for different materials
نویسندگان
T.Y. M. Al- Naib
Mechanical Engineering DepartmentAl Nahrain University
Ali Hussain Mohammed Al-Hilli
Mechanical Engineering DepartmentAl Nahrain University
شیوه ارجاع
Al- Naib, T.Y. M. and Al-Hilli, Ali Hussain Mohammed,1384,Springback in beams and plates of work hardening materials due to variable combinations of Stretch-Bending,01st Tehran International Congress on Manufacturing Engineering (TICME2005),Tehran
ارائهشده در
مجموعه مقالات اولین کنفرانس بین المللی و هفتمین کنفرانس ملی مهندسی ساخت و تولید1 فروردین 1384 · تهران