中国有色金属学报(英文版)
中國有色金屬學報(英文版)
중국유색금속학보(영문판)
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
2014年
2期
462-469
,共8页
板材软模成形%有限元法%无网格伽辽金法%耦合%铝合金
闆材軟模成形%有限元法%無網格伽遼金法%耦閤%鋁閤金
판재연모성형%유한원법%무망격가료금법%우합%려합금
sheet flexible-die forming%finite element method%element-free Galerkin method%coupling%aluminum alloy
提出一种板材变形和软模体积变形耦合的数值分析方法。基于更新的拉格朗日(UL)列式,板材的弹塑性变形采用有限元法(FEM)分析,软模的体积变形采用无网格伽辽金法(EFGM)分析,板材和软模之间的摩擦接触通过罚函数法来处理。利用开发的有限元-无网格法耦合算法程序(CDSB-FEM-EFGM)分析板材弹性软模胀形过程。同有限元软件DEFORM-2D得到的数值解以及实验结果相比,验证了所开发程序的有效性。这种方法为分析板材软模成形提供了一种适合的数值方法。
提齣一種闆材變形和軟模體積變形耦閤的數值分析方法。基于更新的拉格朗日(UL)列式,闆材的彈塑性變形採用有限元法(FEM)分析,軟模的體積變形採用無網格伽遼金法(EFGM)分析,闆材和軟模之間的摩抆接觸通過罰函數法來處理。利用開髮的有限元-無網格法耦閤算法程序(CDSB-FEM-EFGM)分析闆材彈性軟模脹形過程。同有限元軟件DEFORM-2D得到的數值解以及實驗結果相比,驗證瞭所開髮程序的有效性。這種方法為分析闆材軟模成形提供瞭一種適閤的數值方法。
제출일충판재변형화연모체적변형우합적수치분석방법。기우경신적랍격랑일(UL)렬식,판재적탄소성변형채용유한원법(FEM)분석,연모적체적변형채용무망격가료금법(EFGM)분석,판재화연모지간적마찰접촉통과벌함수법래처리。이용개발적유한원-무망격법우합산법정서(CDSB-FEM-EFGM)분석판재탄성연모창형과정。동유한원연건DEFORM-2D득도적수치해이급실험결과상비,험증료소개발정서적유효성。저충방법위분석판재연모성형제공료일충괄합적수치방법。
A numerical method for coupled deformation between sheet metal and flexible-die was proposed. Based on the updated Lagrangian (UL) formulation, the elastoplastic deformation of sheet metal was analyzed with finite element method (FEM) and the bulk deformation of flexible-die was analyzed with element-free Galerkin method (EFGM). The frictional contact between sheet metal and flexible-die was treated by the penalty function method. The sheet elastic flexible-die bulging process was analyzed with the FEM-EFGM program for coupled deformation between sheet metal and bulk flexible-die, called CDSB-FEM-EFGM for short. Compared with finite element code DEFORM-2D and experiment results, the CDSB-FEM-EFGM program is feasible. This method provides a suitable numerical method to analyze sheet flexible-die forming.