An Experimental Study and FEM-Based Analysis for Road Safety Barriers: Additively Manufactured PLA–Geopolymer Hybrid Composites
Özet
<jats:p>This study investigates the impact response and energy absorption performance of additively manufactured PLA–geopolymer hybrid composites for potential application in road safety barriers. Hybrid Charpy specimens were fabricated with three different infill densities (20%, 60%, and 100%), combining a 3D-printed PLA outer shell with a geopolymer core. Charpy impact tests were conducted in accordance with ISO 179-1 and ASTM D6110, and the absorbed energy, specific energy absorption, and mass efficiency were determined experimentally. A phase-based analytical model was also used to estimate elastic energy contributions, while fracture surfaces were examined to identify infill-dependent damage mechanisms. To extend the material-level findings to an engineering-scale application, the observed trends were transferred to a New Jersey-type road safety barrier model and evaluated using ANSYS Explicit Dynamics. The results showed that infill density strongly affects fracture behavior and energy dissipation performance, with 60% infill providing the most balanced response in terms of energy absorption and mass/material efficiency. The originality of the present study lies in going beyond a material-scale investigation of the impact behavior of additively manufactured PLA–geopolymer hybrid structures by integrally correlating the experimental Charpy results with a theoretical energy-based framework, fracture-surface observations, and explicit dynamic finite element analysis of a New Jersey-type road safety barrier model.</jats:p>
Atıf için künye
Yentimur, M. F., Akarsu, O., Alparslan, C., Kütük-Sert, T., Bayraktar, Ş., Aydın, A. C., & Tortum, A. (2026). An Experimental Study and FEM-Based Analysis for Road Safety Barriers: Additively Manufactured PLA–Geopolymer Hybrid Composites. Polymers, 18(8), 1–31. https://doi.org/10.3390/polym18080905
BibTeX
@article{yentimur2026-185244,
author = {Yentimur, Muhammed Fatih and Akarsu, Oğuzhan and Alparslan, Cem and Kütük-Sert, Tuba and Bayraktar, Şenol and Aydın, Abdulkadir Cüneyt and Tortum, Ahmet},
title = {An Experimental Study and FEM-Based Analysis for Road Safety Barriers: Additively Manufactured PLA–Geopolymer Hybrid Composites},
journal = {Polymers},
year = {2026},
volume = {18},
number = {8},
pages = {1--31},
issn = {2073-4360},
doi = {10.3390/polym18080905},
url = {https://akademik.atauni.edu.tr/yayinlar/185244-an-experimental-study-and-fem-based-analysis-for-road-safety-barriers-additively}
}