文章信息/Info

Title:

Sheet Metal Forming Technologies for Energy System Related Components

作者:

 呂曉芳;  李細鋒; 陳軍

上海交通大學塑性成形技術與裝備研究院

Author(s):

LV Xiaofang;  LI Xifeng;  CHEN Jun

Department of Plasticity Technology, Shanghai Jiao Tong University

關鍵詞:

能源行業; 鈑金構件; 數值仿真; 場變量; 映射

DOI:

10.7502/j.issn.1674-3962.2016.04.03

文獻標志碼:

A

摘要:

薄壁鈑金構件是機械裝備的重要外觀和結構件。本文結合現有的鈑金零件生產技術與裝備，概述能源行業用鈑金零部件的成形技術現狀。重點介紹了燃料電池（PEMFC）雙極板凹凸狀流道成形、核燃料定位格架條帶的沖切彎曲成形和太陽能電池基板軋制成形技術的研究現狀。運用ABAQUS/Explicit軟件，通過編寫VUMAT用戶材料子程序引入材料模型、各向異性屈服準則和韌性斷裂準則，建立了一種鎳合金核燃料格架條帶沖裁成形的三維數值仿真模型。沖裁斷口質量的仿真結果與試驗結果的對比表明光亮帶和斷裂帶的比例分布吻合較好。通過ABAQUS 子程序二次開發，實現了歷史變形損傷殘余由實體單元到殼單元的映射，應用于后續彎曲成形仿真并與理想模型仿真和試驗結果相對比，驗證損傷映射的必要性和準確性。

Abstract:

In the present work, the state-of-the-art in forming technologies of sheet metal components in energy industry was summarized. Especially, the current forming technologies of polar plate for fuel PEMFC, spacer grid in LWR fuel assembly and solar cell substrate were mainly addressed. The three dimensional forming simulation model of blanking process of one spacer grid stripe was built up based on ABAQUS/Explicit. The user material subroutine VUMAT was employed and the material model, anisotropic yield criterion and ductile fracture criteria in ABAQUS were implemented. Comparison of predicted blanking fracture section and experimental results shows that the FEM simulation results are in good agreement with the experimental ones. Through the secondary development of the subroutine in ABAQUS, the mapping of the historical residual damage from solid elements to shell element was realized. The bending process after blanking was simulated with this mapping method. The accuracy of the mapping method was verified by comparing simulation results with or without mapping to the experiment result.