Heterogeneous tensile test on elastoplastic metallic sheets: Comparison between FEM simulations and full-field strain measurements
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- 作者：S. Belhabib ; H. Haddadi ; M. Gaspé ; rini ; P. Vacher
- 关键词：Strain-field measurements ; DIC technique ; Identification ; Finite element analysis ; Dual-phase steel
- 刊名：International Journal of Mechanical Sciences
- 出版年：2008
- 出版时间：January 2008
- 年：2008
- 卷：50
- 期：1
- 页码：14-21
- 全文大小：1077 K
文摘
The aim of this work is to propose a non-standard tensile test suitable for the identification of material parameters using full-field strain measurements and finite element analysis. The shape of the sample to be used in this new test must verify three criteria: (i) large heterogeneity of the strain in the gauge area, (ii) large strain-paths diversity and (iii) a good sensitivity of the strain field to the material parameters. After identifying the mechanical parameters of a dual-phase steel sheet using σ–ε and r–l57"">l57&_user=10&_cdi=5753&_rdoc=3&_acct=C000050221&_version=1&_userid=10&md5=75b366150dac2852dbc2417cbc021a95"" title=""Click to view the MathML source"">α curves, samples of different shapes were studied in order to choose the one that presents the best compromise between the three criteria. The comparison between simulated and measured fields shows a qualitative accordance. Taking into account the difference between these fields in the expression of the cost-function to minimize is expected to improve the quality of the identified material parameters.