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

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

L. Chen, T. Clausmeyer, A.E. Tekkaya

Institute of Forming Technology and Lightweight Construction, TU Dortmund University, Baroper Str. 303, 44227 Dortmund, Germany.

DOI:

https://doi.org/10.7494/cmms.2015.1.0517

Abstract:

In this short paper the complex mechanical behavior of an aluminum/low density polyethylene (LDPE) half sandwich sheet in the context of blanking is investigated. Suitable mechanical tests for the polymer and metal layer as well as the delamination behavior of the adhesive between these two layers were conducted. The main focus of this study is to create a finite-element (FE) model for the blanking process of sandwich structures. Material parameters for a Lemaitre-type damage model, a Drucker-Prager and a cohesive zone model are identified for the metal, the polymer and the adhesive, respectively. The experimental force-displacement curves obtained in a blanking process of a half sandwich sheet are compared with the predicted results of the FE model. The qualitative agreement of the predicted force-displacement curves with the experimental results is good. Recommendations concerning the improvement of the FE model are given based on the obtained results.

Cite as:

Chen, L., Clausmeyer, T., & Tekkaya, A. (2015). Experimental characterization and numerical modeling of the mechanical behavior of half sandwich laminate in the context of blanking. Computer Methods in Materials Science, 15(1), 162-168. https://doi.org/10.7494/cmms.2015.1.0517

Article (PDF):

Keywords:

Sandwich plates, Blanking, CDM, Drucker-Prager model, Cohesive zone model

Publication dates:

Received: 16.10.2014, accepted: 26.11.2014, published: 20.12.2014

Publication type:

Original scientific paper

References:

Burchitz, I., Boesenkool, R., Zwaag, Svd., Tassoul, M., 2005, Highlights of designing with Hylite – a new material concept, Mater Design, 26, 271-279.

Harhash, M., Sokolova, O., Carradó, A., Palkowski, H., 2014, Mechanical properties and forming behaviour of laminated steel/polymer sandwich systems with local inlays – Part 1, Compos Struct, 118, 112-120.

Lemaitre, J., 1985, A continuum damage mechanics model for ductile fracture, J Eng Mater-T ASME, 107, 83-89.

Steinbach, F., Chen, L., Güner, A., Tekkaya, A., E., 2014, Experiment and numerical analysis of dry shearing of aluminum 6082, Adv Mat Res, 1018, 261-268.

Hambli, R., 2001, Comparison between Lemaitre and Gurson damage models in crack growth simulation during blanking process, Int J Mech Sci, 43, 2769-2790.

Liewald, M., Bolay, C., Thullner, S., 2013, Shear cutting and counter shear cutting of sandwich materials, Journal of Manufacturing Processes, 15, 364-373.

Drucker, D. C., Prager, W., Greenberg, H. J., 1952, Extended limit design theorems for continuous media, Q Appl Math, 9, 381-389.

Soyarslan, C., Tekkaya, A. E., Akyüz, U., 2008, Application of continuum damage mechanics in discontinuous crack formation: forward extrusion chevron predictions, Z Angew Math Mech, 88, 436-453.