Experimental determination and numerical simulation of temperature dependent material and damage behaviour of additively manufactured polyamide 12
| Autor: | Ilja Sagradov, Daniela Schob, Phillip Maasch, Robert Roszak, Holger Sparr, Krzysztof Kotecki, Rainer Franke, Matthias Ziegenhorn |
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| Rok vydání: | 2021 |
| Předmět: |
Work (thermodynamics)
Materials science Viscoplasticity Computer simulation 02 engineering and technology 021001 nanoscience & nanotechnology Isothermal process 020303 mechanical engineering & transports 0203 mechanical engineering Mechanics of Materials Ultimate tensile strength Polyamide Coupling (piping) General Materials Science Sensitivity (control systems) Composite material 0210 nano-technology Instrumentation |
| Zdroj: | Mechanics of Materials. 159:103893 |
| ISSN: | 0167-6636 |
| Popis: | Temperature dependent material and damage behaviour of additively manufactured polyamide 12 was analysed. Two different types of tests were carried out. Very slow isothermal and non-isothermal tensile tests at various temperature levels. The results served as basis for the determination of the parameters of the numerical simulation. In a previous study, it was observed that the viscoplastic material model of Chaboche and the damage model of Gurson-Tvergaard-Needleman are very well suited to the material and damage behaviour at room temperature. This work presents that the material model of Chaboche and the damage model of Gurson-Tvergaard-Needleman can be used for isothermal tensile tests at various temperature levels to simulate material and damage behaviour of selectively laser-sintered polyamide 12, with the requirement that the parameters are adjusted for each temperature level. Furthermore, the temperature dependence of the GTN parameters and a sensitivity analysis is presented. Finally, by extending the Chaboche model with the Johnson-Cook approach and coupling it with the Gurson-Tvergaard-Needleman damage model, the material and damage behaviour can be applied under non-isothermal test conditions. |
| Databáze: | OpenAIRE |
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