Open Access Article

Title: Towards the democratisation of design: a generalised capability model for FDM

Authors: Mark Goudswaard; Ben Hicks; Aydin Nassehi

Addresses: CAME School of Engineering, The University of Bristol, Queen's Building, University Walk, Bristol, BS8 1TR, UK ' CAME School of Engineering, The University of Bristol, Queen's Building, University Walk, Bristol, BS8 1TR, UK ' CAME School of Engineering, The University of Bristol, Queen's Building, University Walk, Bristol, BS8 1TR, UK

Abstract: The manufacture of parts via fused deposition modelling (FDM) is inhibited by a lack of understanding of the manufacturing process, resulting in parts having unreliable mechanical properties. Correspondingly, this paper considers the incorporation of capability profiles (CPs) for FDM as a solution. The evolved requirements of CPs for FDM are considered and the necessary process information that would be incorporated within them is presented. A review of existing literature of the effect of process parameters on mechanical properties of FDM parts identifies process variability and the effects of shape and scale as areas insufficiently studied. To address this, tensile tests are conducted revealing: 1) variation (26%) in identical test specimens' UTS; 2) that properties do not scale linearly with specimen size; 3) that cross-sectional shape directly impacts mechanical performance. These results are used to define the parameters required for a capability profile for FDM and subsequently demonstrate its functionality.

Keywords: democratisation of design; material testing; capability profiles; additive manufacturing; design for additive manufacturing; mechanical properties; filament deposition modelling; FDM; manufacturing parameters.

DOI: 10.1504/IJASM.2020.10027674

International Journal of Agile Systems and Management, 2020 Vol.13 No.1, pp.79 - 101

Received: 24 Mar 2019
Accepted: 20 Aug 2019

Published online: 16 Mar 2020 *