Materials Today: Proceedings 3 (2016) 969 – 972 Available online at www.sciencedirect.com ScienceDirect 2214-7853 © 2016 Published by Elsevier Ltd. Selection and Peer-review under responsibility of the Committee Members of 32nd DANUBIA ADRIA SYMPOSIUM on Advanced in Experimental Mechanics (DAS 2015) doi:10.1016/j.matpr.2016.03.030 DAS 2015 New application of 3D printing method for photostress investigation Péter Ficzere a *, Lajos Borbás b a Budapest University of Technology and Economics, Department of Vehicle Parts and Structures Analysis, H-1111 Budapest, Stoczek u. 2. b EDUTUS College, Technical Institution, Tatabánya, H-2800 Tatabánya, Béla Király krt. 58. Abstract The photoelastic coating technique (Photostress analysis) is one of the most powerful practices to determine the stress state of real machine elements under real loading conditions. The method can be used even in case of complicated surfaces to reveal the stress concentration areas, and the results can serve as input data for numerical analysis. To accelerate the reaction time of the method a new technique for coating preparation is introduced in this paper. © 2015 Elsevier Ltd. All rights reserved. Selection and Peer-review under responsibility of the Committee Members of 32nd DANUBIA ADRIA SYMPOSIUM on Advanced in Experimental Mechanics (DAS 2015). Keywords: Photoelastic coating technique, layer preparation, 3D printing method, CAD 1. Introduction The behaviour of machine elements under real loading conditions always contains some uncertainties. Nowadays the generally used design procedure in machine design is the 3D CAD/CAM software using finite elements methods. The basic question of the procedure is the exact knowledge of the boundary conditions, constraints and the external loading conditions, as the input data of the numerical calculation [1]. The proper determination of the external loading conditions and constraints in many cases is a difficult procedure; nevertheless the precise determination of the specified parameters is essential. One of the most reliable procedures to determine the loading conditions and constraints is to use any experimental method, like the photoelastic coating technique [2], [3], [4], [5]. Inappropriate design procedures and incomplete knowledge of the external loading conditions presents a significant risk factor. * Corresponding author. Tel.: +36 1 463 1111/ 5853; fax: +36 1 463-1111/5857. E-mail address: ficzerep@kge.bme.hu © 2016 Published by Elsevier Ltd. Selection and Peer-review under responsibility of the Committee Members of 32nd DANUBIA ADRIA SYMPOSIUM on Advanced in Experimental Mechanics (DAS 2015)