A numerical and experimental comparison of test methods for the shear strength in hybrid metal/thermoplastic-compounds

19th Chemnitz Seminar on Materials Engineering – 19. Werkstofftechnisches Kolloquium

Saborowski, E.^1 ; Scholze, M.^1 ; Lindner, T.^1 ; Lampke, T.^1

Institute of Materials Science and Engineering, Chemnitz University of Technology, Chemnitz

09125, Germany^1

关键词: Comparative studies;    Experimental comparison;    Experimental realizations;    Inter-laminar shear strengths;    Interfacial damages;    Numerical investigations;    Torsion test methods;    User-defined material model;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/181/1/012031/pdf
DOI  :  10.1088/1757-899X/181/1/012031

来源: IOP

【 摘 要 】

The lap shear test is a common method for determining the interlaminar shear strength of material compounds due to its simplicity with regard to specimen production and experimental realization. However, the obtained results strongly depend on the material pairing and the specimen geometry, which have a significant influence to the stress state within the interface during the experiment. A torsion test method using butt-bonded hollow cylinders seems more appropriate due to the expected more homogeneous shear stress distribution. The aim of this work is to compare both testing methods by experimental and numerical investigations. A comparative study with thermally joined aluminum-polyamide hybrid compounds was performed. The corresponding simulations were carried out with the commercial FE-software Abaqus™, using a user defined material model for the thermoplastic joining partner and the built-in cohesive behavior contact property for modelling interfacial damage.