Empirical methodology to determine inherent strains in additive manufacturing
| Autor: | Iñaki Setien, Michele Chiumenti, A. Echeverria, Sjoerd van der Veen, Maria San Sebastian, F. Garciandia |
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| Přispěvatelé: | Universitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental, Universitat Politècnica de Catalunya. RMEE - Grup de Resistència de Materials i Estructures en l'Enginyeria |
| Rok vydání: | 2018 |
| Předmět: |
0209 industrial biotechnology
Work (thermodynamics) Mathematical optimization Design stage Additive manufacturing Inherent strain Finite element modelling 02 engineering and technology 021001 nanoscience & nanotechnology Enginyeria dels materials [Àrees temàtiques de la UPC] Finite element method Computational Mathematics 020901 industrial engineering & automation Computational Theory and Mathematics Residual stress Support removal Modeling and Simulation Distortion Titanium alloys Titani -- Aliatges 0210 nano-technology Mathematics |
| Zdroj: | UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) Recercat. Dipósit de la Recerca de Catalunya instname Computers & Mathematics with Applications |
| DOI: | 10.5281/zenodo.2637851 |
| Popis: | Part distortion is a critical issue during Additive Manufacturing (AM) of metallic parts since it prevents this technology from being implemented at industrial level. To this regard, distortion prediction even from design stage has become crucial. Actually, numerical modelling methodologies play an important role here. Different modelling approaches have been developed but one of the most computationally efficient methodology to predict distortion is the so called inherent strain method. In this work an empirical methodology to determine inherent strains is presented. This is the input data in simplified Finite Element (FE) models in order to predict distortion and residual stress fields. These inherent strains are calculated considering layer lumping strategies that might be adopted in the numerical model as well. The procedure has been developed and validated using the wellknown twin-cantilever beam structure. Ti-6Al-4V beams have been manufactured by LPBF technology following different scanning strategies. Distortion after support removal has been measured in order to be compared against numerical results. The methodology has been applied at coupon level giving accurate results and providing a preliminary validation. |
| Databáze: | OpenAIRE |
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