Design & Manufacturing

Korean Society of Die & Mold Engineering (한국금형공학회)
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Machine Learning to Improve Tensile Strength of 3D-Printed Tensile Specimens

3D 프린팅된 인장 시편의 인장강도 향상을 위한 머신러닝

  • Bum-Soo Kim (Department of Optical Engineering and Metalmold, Kongju National University) ;
  • Seong-Yeol Han (Department of Digital Convergence Metalmold Engineering, Kongju National University)
  • 김범수 (국립공주대학교 광공학.금형공학과) ;
  • 한성열 (국립공주대학교 디지털융합금형공학)
  • Received : 2024.02.15
  • Accepted : 2024.03.31
  • Published : 2024.03.31
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Abstract

As the range of 3D printed applications expands, there is an increasing demand for the production of outputs wit h excellent durability and reliability. In this study, the highest tensile strength printing condition was identified by printing a tensile test specimen using PLA (Poly Lactic Acid) resin, considering various printing conditions. To determine the optimal combination of printing conditions, various machine learning algorithms were compared, and Stochastic Gradient Descent(SGD) demonstrated the best performance in predicting tensile strength. Using SGD, 3,000 sets of printing conditions were generated by combining various parameters, and the best printing condition set was selected. A tensile test specimen was then produced according to the selected printing conditions, and the subsequent tensile test yielded a measured tensile strength value of 41.86 N/mm2. The predicted tensile strength value by the SGD algorithm was 43.34 N/mm2, resulting in a prediction accuracy of 96.23%.

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References

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