Bending and Twisting Springback Prediction in the Punching of the  Core for a Lattice Truss Sandwich Structure

doi:10.1007/s40195-012-0268-0

Acta Metallurgica Sinica (English Letters) ›› 2013, Vol. 26 ›› Issue (3): 241-246.DOI: 10.1007/s40195-012-0268-0

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Bending and Twisting Springback Prediction in the Punching of the Core for a Lattice Truss Sandwich Structure

Wenchun JIANG, Bin YANG, Xuewei GUAN and Yun LUO

State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum (East China), Qingdao 266555, China

Received:2012-12-20 Revised:2013-01-16 Online:2013-06-25 Published:2013-05-06
Contact: Wenchun JIANG
Supported by:
National Natural Science Foundation of China (No.51105380), Doctoral Program of Higher Education of China (No.20100133120008), Natural Science Foundation of Shandong Province (No.ZR2010AQ002), Fundamental Research Funds for the Central Universities (No.10CX04030A) and Key Laboratory ofPressure System and Safety(MOE), East China University of Science and Technology.

Abstract

Abstract:

The finite element method was used to study the springback induced by the punching of the core. In order to simulate the springback accurately, a mixed isotropic-nonlinear kinematic hardening model is used to define the material mechanical behavior during plastic deformation. The effects of the friction coefficient, the plate thickness and the die radius have been investigated. The results show that the springback of the sheet with diamond hole is different from the homogenous sheet. Not only bending springback, but also a twisting springback along the truss is generated because of the non-uniform distribution of the bending stress along the truss length. The plate thickness should be around 1.3 mm with larger friction coefficient and smaller die radius, which is useful to decrease the bending and twisting springback.

Key words: Plate with diamond hole, Punch, Springback

Wenchun JIANG, Bin YANG, Xuewei GUAN and Yun LUO. Bending and Twisting Springback Prediction in the Punching of the Core for a Lattice Truss Sandwich Structure[J]. Acta Metallurgica Sinica (English Letters), 2013, 26(3): 241-246.

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Bending and Twisting Springback Prediction in the Punching of the Core for a Lattice Truss Sandwich Structure

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