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The influence of dog-bone shaped specimen geometry on tensile test results of fused filament fabricated Nylon 12

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Abstract

This paper reports our study comparing the tensile stress-strain data taken on a fused filament fabricated Nylon 12 material additively manufactured in two distinct directions (i.e., horizontal and vertical), using typical dog-bone shaped specimens of two different cross-section shapes; rectangular and circular. Our objectives in carrying out this investigation were to evaluate the effects of specimen geometry on the elasticity and strength characteristics of the involved PA12 material. One-way ANOVA analysis, Tukey’s HSD, and Games-Howell tests were considered to compare the mean values of two cross-section shapes’ groups (i.e., rectangular vs. circular). The results of ultimate tensile strength obtained for horizontally printed specimens and the elongation at break deTermined for vertically oriented samples show notable differences at a significance p-level of 0.05.

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Abbreviations

AM :

Additive manufacturing

FFF :

Fused filament fabrication

PA12 :

Polyamide 12 (Nylon 12)

MOE :

Modulus of elasticity

UTS :

Ultimate tensile strength

EaB :

Elongation at break

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Authors and Affiliations

  1. Department of Mechanical Engineering, Faculty of Mechanical Engineering, Transilvania University of Braşov, 500036, Braşov, România

    Marius Nicolae Baba & Călin Itu

Authors
  1. Marius Nicolae Baba
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  2. Călin Itu
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Corresponding author

Correspondence to Marius Nicolae Baba.

Additional information

Marius Nicolae Baba graduated Faculty of Wood Engineering and received his Mechanical Engineering Ph.D. in 2010 from Transilvania University of Braşov in the field of strength of materials and theory of elasticity. In parallel to his university position, between 2013 and 2017, he worked as a senior structural engineer in aerospace engineering for Consaro Engineering S.R.L. His research interests focus on structural mechanics of CFRP laminate composites and AM materials, fatigue and fracture mechanics, and finite element analysis.

Călin Itu graduated Faculty of Mechanical Engineering and received his Mechanical Engineering Ph.D. in 2014 from Transilvania University of Braşov. His research field is concerned with strength of materials, multi-body dynamics, mechanical vibrations, and the finite element method. In parallel to his university post, between 2006 and 2019, he worked as a senior stress engineer in the field of automotive engineering and heavy machinery for Cambric Consulting S.R.L., Tata Technologies S.R.L, and Schaffler Romania S.R.L.

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Baba, M.N., Itu, C. The influence of dog-bone shaped specimen geometry on tensile test results of fused filament fabricated Nylon 12. J Mech Sci Technol 37, 1077–1082 (2023). https://doi.org/10.1007/s12206-022-2102-6

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  • DOI: https://doi.org/10.1007/s12206-022-2102-6

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