Application of Strain Non-Uniformity Index (SNI) Based Approach to Predict Failure in Sheet Metal Components

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

Date, P.P.^1 ; Jamadar, K.D.^2

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

400076, India^1

Volkswagen Nutzfahrzeug, Hannover, Germany^2

关键词: Failure locations;    Failure prediction;    Forming limit diagrams;    Industrial components;    Sheet forming;    Sheet metal components;    Strain distributions;    Superplastic forming;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/734/3/032054/pdf
DOI  :  10.1088/1742-6596/734/3/032054

来源: IOP

【 摘 要 】

Industrial components are far too complex in shape and far too large in size compared to the laboratory scale test samples used to establish failure criteria like the forming limit diagram (FLD). These have been traditionally used to predict failure, but are found to often make wrong predictions due to their sensitivity to strain path, and forming conditions like temperature. The Strain Nonuniformity Index (SNI), a single parameter determined from the spatial strain distribution, may be used to predict failure and identify locations of failure or even imminent failure. This is possible regardless of temperature or even the method of forming (cold forming, hot forming, superplastic forming etc.). The paper presents a few results demonstrating successful applications of this novel SNI based technique.