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

作     者：Sheng Cai Lin Chen Sheng Cai;Lin Chen

作者机构：Department of V ehicle EngineeringCollege of EngineeringChina Agricultural UniversityBeijing 100083People's Republic of China CW Bearing GmbHHamburg 22113Germany 

出 版 物：《Advances in Manufacturing》 (先进制造进展（英文版）)

年 卷 期：2020年第8卷第2期

页      面：177-188页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 0817[工学-化学工程与技术] 0807[工学-动力工程及工程热物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 0811[工学-控制科学与工程] 0801[工学-力学（可授工学、理学学位）] 

基　　金：Institute of Forming Technology and Lightweight Construction TU Dortmund Leibniz-Institut für Arbeitsforschung an der TU Dortmund Deutscher Akademischer Austauschdienst, DAAD 

主　　题：Sandwich plates Blanking Continuum damage mechanics(CDM) Drucker-Prager model Cohesive zone model 

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.