Experimental Verification of the Strain Non-Uniformity Index (SNI) based Failure Prediction

10th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes

Dhumal, D.A.^1 ; Kulkarni, Pratik^2 ; Date, P.P.^2 ; Nandedkar, V.M.^1

Department of Production Engineering, SGGS Institute of Engineering and Technology, Nanded

431606, India^1

Department of Mechanical Engineering, Indian Institute of Technology Bombay, Mumbai

400076, India^2

关键词: AA6016;    Experimental conditions;    Experimental verification;    Failure prediction;    Forming limit curve;    Nonuniformity;    Process parameters;    Strain distributions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/734/3/032108/pdf
DOI  :  10.1088/1742-6596/734/3/032108

来源: IOP

【 摘 要 】

Formability of the sheet metal depends upon the uniformity of strain distribution, which depends on material properties, tooling and process parameters. Nakazima Test was conducted to study the strain distribution and establish the forming limits of AA 6016. The experimental conditions were simulated using AUTOFORM 5.2 Plus software and the failure predicted using the SNI based methodology. The failure predictions were correlated with the state of the experimentally deformed Nakazima samples, and also with the FLD based forming limits. The failure prediction from the SNI based methodology was found to correlate well with the state of the experimental Nakazima sample.