A Mixed Numerical-Experimental Method to Characterize Metal-Polymer Interfaces for Crash Applications

Metallic (M) and polymer (P) materials as layered hybrid metal-polymer-metal (MPM) sandwiches offer a wide range of applications by combining the advantages of both material classes. The interfaces between the materials have a considerable impact on the resulting mechanical properties of the composi...

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Bibliographic Details
Published in:Metals (Basel ) 2021-05, Vol.11 (5), p.818
Main Authors: Richter, Jonas, Kuhtz, Moritz, Hornig, Andreas, Harhash, Mohamed, Palkowski, Heinz, Gude, Maik
Format: Article
Language:English
Subjects:
Adhesives
Bond strength
Calibration
Cantilever beams
cohesive elements
Crack propagation
Design modifications
Dissimilar materials
Energy
Energy release rate
Experimental methods
Galvanized steel
Impact strength
interface characterization
Interfaces
inverse material calibration
Mechanical properties
metal polymer sandwich
Numerical analysis
Parameter identification
Parameter modification
Polymers
Polyolefins
Propagation
Shear tests
Simulation
Tension tests
Test methods
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Summary:Metallic (M) and polymer (P) materials as layered hybrid metal-polymer-metal (MPM) sandwiches offer a wide range of applications by combining the advantages of both material classes. The interfaces between the materials have a considerable impact on the resulting mechanical properties of the composite and its structural performance. Besides the fact that the experimental methods to determine the properties of the single constituents are well established, the characterization of interface failure behavior between dissimilar materials is very challenging. In this study, a mixed numerical–experimental approach for the determination of the mode I energy release rate is investigated. Using the example of an interface between a steel (St) and a thermoplastic polyolefin (PP/PE), the process of specimen development, experimental parameter determination, and numerical calibration is presented. A modified design of the Double Cantilever Beam (DCB) is utilized to characterize the interlaminar properties and a tailored experimental setup is presented. For this, an inverse calibration method is used by employing numerical studies using cohesive elements and the explicit solver of LS-DYNA based on the force-displacement and crack propagation results.
ISSN:2075-4701
2075-4701
DOI:10.3390/met11050818