Preface

详细信息    查看全文

• 作者：Guido Goldoni ; Lucia Sorba ; on behalf of the organizing committee
• 关键词：Drawbead ; DBRF ; Hybrid method ; Bauschinger effect ; Isotropic– ; kinematic hardening law ; Anisotropic yield function
• 刊名：Physica E
• 出版年：2008
• 出版时间：March 2008
• 年：2008
• 卷：40
• 期：5
• 页码：v-vi
• 全文大小：47 K

文摘

Numerical procedures to predict drawbead restraining forces (DBRF) were developed based on the semi-analytical (non-finite-element) hybrid membrane/bending method. The section forces were derived by equating the work to pull sheet material through the drawbead to the work required to bend and unbend the sheet along with frictional forces on drawbead radii. As a semi-analytical method, the new approach was especially useful to analyze the effects of various constitutive parameters with less computational cost. The present model could accommodate general non-quadratic anisotropic yield function and non-linear anisotropic hardening under the plane strain condition. Several numerical sensitivity analyses for examining the effects of process parameters and material properties including the Bauschinger effect and the shape of yield surface on DBRF were presented. Finally, the DBRFs of SPCC steel sheet passing a single circular drawbead were predicted and compared with the measurements.