Experimental and numerical investigations of the mechanical behavior of half sandwich laminate in the context of blanking  

作　　者：Sheng Cai Lin Chen 

机构地区：[1]Department of V ehicle Engineering,College of Engineering,China Agricultural University,Beijing 100083,People's Republic of China [2]CW Bearing GmbH,Hamburg 22113,Germany

出　　处：《Advances in Manufacturing》2020年第2期177-188,共12页先进制造进展（英文版）

摘　　要：In this study,the complex mechanical behavior of an aluminum/low-density polyethylene(LDPE)half sandwich structure was investigated during the blanking process.Mechanical tests were conducted for the polymer and metal layer and the delamination behavior of the adhesive between the two layers.A new testing device was designed for detecting the delamination under tensile mode.Corresponding finite element models were established for the mechanical tests of the metal layer and the delamination of both layers for inverse parameter identifcation.Material parameters for Lemaitre-type damage,Drucker-Prager,and cohesive zone modeIs were identified for the metal,polymer,and adhesive,respectively.A finiteelement(FE)model was established for the blanking process of the sandwich structures.The experimental forcedisplacement curves,obtained in the blanking process of the half sandwich sheet,were compared with the predicted results of the FE model.The results showed that the predicted force-displacement curves and the experimental results were in good agreement.Additionally,the correlation between cutting clearance and changes in the forcedisplacement curves was obtained.Three feature values quantitatively described the imperfection of the experimental cutting edge.The effect of punch clearance on these values was studied numerically and experimentally.The results indicated that a smaller clearance generated a better cutting-edge quality.The stress state of the half sandwich structure during blanking was analyzed using the established FE model.

关 键 词：Sandwich plates BLANKING Continuum damage mechanics(CDM) Drucker-Prager model Cohesive zone model 

分 类 号：TG17[金属学及工艺—金属表面处理]