Effect of Infill Patterns on Tensile Strength and Production Efficiency in PETG 3D Printing

DOI

10.2991/978-94-6463-982-7_24How to use a DOI?

Keywords

Additive Manufacturing; 3D Printing; Infill Pattern; PETG; Tensile Strength

Abstract

This study aims to evaluate the effect of five infill patterns—grid, honeycomb, triangular, concentric, and line—on the tensile strength of PETG specimens and analyze production efficiency based on printing time, material use, and cost. ASTM D638 Type I dog-bone specimens (30% infill) were fabricated on a Bambu Lab A1 under uniform parameters (0.4 mm nozzle, 240℃/85℃ nozzle/bed, 0.20 mm layer height, 100 mm/s), with three replicates per pattern. Statistical analysis confirmed significant differences in tensile strength across patterns. Honeycomb achieved the highest tensile strength (25.28 MPa) but required the longest print time and greatest cost (178 min; $1.81), resulting in the lowest production efficiency. Concentric produced the lowest strength (18.31 MPa) yet the shortest time and lowest cost (114 min; $1.61), indicating suitability for rapid, non-structural applications. The triangular pattern delivered a balanced outcome—20.84 MPa with moderate time/cost (119 min; $1.62)—and ranked highest on an integrated efficiency index (followed by grid and line). This research provides a novel comparative framework for infill selection in PETG, bridging a gap in material-specific studies. Findings indicate that infill geometry is a primary lever for concurrently controlling tensile response and throughput/cost. For load-bearing parts, honeycomb is recommended; for fast, low-cost prototyping, concentric or line is preferable; and for balanced requirements, the triangular pattern is optimal. The results underscore the potential for AI-driven and generative design optimization to automate infill pattern selection based on multi-objective constraints in industrial additive manufacturing.

Copyright

© 2025 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Adi Syahputra Purba
AU  - Nur Fitria Pujo Leksonowati
AU  - Al Fauzan Akhbar Santoso
AU  - Mutiarani
AU  - Nurman Pamungkas
AU  - Windy Stefani
AU  - Meilani Mandhalena Manurung
AU  - Ninda Hardina Batubara
PY  - 2025
DA  - 2025/12/29
TI  - Effect of Infill Patterns on Tensile Strength and Production Efficiency in PETG 3D Printing
BT  - Proceedings of the  8th International Conference on Applied Engineering (ICAE 2025)
PB  - Atlantis Press
SP  - 386
EP  - 396
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-982-7_24
DO  - 10.2991/978-94-6463-982-7_24
ID  - Purba2025
ER  -