A study on springback of profile plane stretch-bending in the loading method of pretension and moment

作者：Zhao Jun^*; Zhai Ruixue; Qian Zhiping; Ma Rui

来源：International Journal of Mechanical Sciences, 2013, 75: 45-54.

DOI：10.1016/j.ijmecsci.2013.06.008

• Profile stretch-bending
• Springback law
• Mechanical model
• Experimental research
• Finite element numerical research

The springback law and springback prediction are always the difficulties in the field of profile stretch-bending processing. Because of the urgent demand for stretch-bending flexible manufacturing, the study on stretch-bending springback aiming at the profile with a given cross-section cannot meet the requirement. In this paper, the profile with any cross-section was taken as the study object. In the loading method of pretension and moment, the mechanical models of profile stretch-bending were established based on the classical elastic-plastic theory and the characteristic of strain superposition. Different distribution states of stress and strain on cross-section were discussed, and the method of discriminating different distribution states was given. The universal analytic method of solving the plane stretch-bending springback of profile with any cross-section was obtained. Two kinds of typical profiles with U-section and rectangular section were taken as examples to verify the theoretical analysis. The stretch-bending springback laws obtained by theoretical analysis, numerical research and experimental research agreed well. This study provides a theoretical foundation for stretch-bending flexible manufacturing and has certain theoretical and engineering guidance value.

• 出版日期2013-10
• 单位燕山大学