PSI - Issue 24

ScienceDirect Structural Integrity Procedia 00 (2019) 000–000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000–000

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

Procedia Structural Integrity 24 (2019) 213–224

© 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the AIAS2019 organizers Abstract The aim of this work is to describe the design process of a non-conventional miniaturized specimen geometry compliant to ASTM E8M and ISO 6892, expressively developed to work with MaCh3D, an innovative miniaturized tensile testing machine. The use additive manufacturing in a production perspective requires continuous certification of the fabricated materials. The characterization activity is expensive both in terms of time and resources used: in addition to the testing operations, it is necessary to consider the cost of the specimens production. Miniaturized specimens allow to drastically reduce printing time and the quantity of raw material needed. The designed specimens present a reduced section with two drop-shaped heads compatible with the MaCh3D gripping system. Numerical analysis has been performed to identify the best fillet radius between heads and parallels section, identifying in a spline curve the best solution. © 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the AIAS2019 organizers AIAS 2019 International Conference on Stress Analysis Development of a miniaturized specimen to perform uniaxial tensile tests on high performance materials Lorenzo Bergonzi a,b,* , Matteo Vettori b , Alessandro Pirondi a a Department of Engineering and Architecture, University of Parma, Parco Area delle Scienze 181/A, 43124 Parma, Italy b MaCh3D srl, Viale Duca Alessandro 42, 43123 Parma, Italy Abstract The aim of this work is to describe the design process of a non-conventional miniaturized specimen geometry compliant to ASTM E8M and ISO 6892, expressively developed to work with MaCh3D, an innovative miniaturized tensile testing machine. The use additive manufacturing in a production perspective requires continuous certification of the fabricated materials. The characterization activity is expensive both in terms of time and resources used: in addition to the testing operations, it is necessary to consider the cost of the specimens production. Miniaturized specimens allow to drastically reduce printing time and the quantity of raw material needed. The designed specimens present a reduced section with two drop-shaped heads compatible with the MaCh3D gripping system. Numerical analysis has been performed to identify the best fillet radius between heads and parallels section, identifying in a spline curve the best solution. © 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the AIAS2019 organizers AIAS 2019 International Conference on Stress Analysis Development of a miniaturized specimen to perform uniaxial tensile tests on high performance materials Lorenzo Bergonzi a,b,* , Matteo Vettori b , Alessandro Pirondi a a Department of Engineering and Architecture, University of Parma, Parco Area delle Scienze 181/A, 43124 Parma, Italy b MaCh3D srl, Viale Duca Alessandro 42, 43123 Parma, Italy

Keywords: additive manufacturing; miniaturized specimen; tensile testing; MaCh3D Keywords: additive manufacturing; miniaturized specimen; tensile testing; MaCh3D

* Corresponding author. Tel.: +39 329 188 7002; E-mail address: lorenzo.bergonzi@studenti.unipr.it * Correspon ing author. Tel.: +39 329 188 7002; E-mail address: lorenzo.bergonzi@studenti.unipr.it

2452-3216 © 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the AIAS2019 organizers 2452-3216 © 2019 The Authors. Published by Elsevier B.V. This is an ope access article under t CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the AIAS2019 organizers

2452-3216 © 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the AIAS2019 organizers 10.1016/j.prostr.2020.02.018