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³í¹®¸í AM °øÁ¤ ¿¬°è ±¸Á¶ Çؼ®À» È°¿ëÇÑ ´Ü¼¶À¯ °­È­ º¹ÇÕ¼ÒÀç 3D ÇÁ¸°Æà Ãâ·Â¹°ÀÇ ±â°èÀû °Åµ¿ Ư¼º ºÐ¼® / A Study on the Mechanical behavior of 3D Printed Short-Fiber Reinforced Composite Structures using AM-Structural Coupled Analysis
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¼ö·Ï»çÇ× Çѱ¹Àü»ê±¸Á¶°øÇÐȸ³í¹®Áý, Vol.37 No.5 (2024-10)
ÆäÀÌÁö ½ÃÀÛÆäÀÌÁö(309) ÃÑÆäÀÌÁö(8)
ISSN 1229-3059
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ÁÖÁ¦¾î º¹ÇÕ¼ÒÀç 3D ÇÁ¸°ÆÃ; AM °øÁ¤ ¿¬°è ±¸Á¶ Çؼ®; À̹æÀû ¼ÒÀç ¹°¼º; ³ëÁñ °æ·Î ; composite 3D printing; AM-structural coupled analysis; anisotropic material properties; nozzle path
¿ä¾à1 º» ³í¹®¿¡¼­´Â 3D ÇÁ¸°Æà °øÁ¤À» ÅëÇØ Á¦ÀÛµÈ ´Ü¼¶À¯ °­È­ º¹ÇÕ¼ÒÀç ±¸Á¶¹°ÀÇ ±â°èÀû °Åµ¿À» È¿°úÀûÀ¸·Î ¿¹ÃøÇϱâ À§ÇÑ AM °øÁ¤¿¬°è ±¸Á¶ Çؼ® ±â¹ýÀ» Á¦¾ÈÇÏ¿´´Ù. º¹ÇÕ¼ÒÀç 3D ÇÁ¸°ÅÍ(Mark Two, Markforged)¸¦ È°¿ëÇÏ¿© ´Ù¾çÇÑ ³ëÁñ °æ·Î¸¦ °®´Â ÀÎÀå ½ÃÆíÀ» Ãâ·ÂÇÏ¿´À¸¸ç, Ãâ·Â¹°¿¡ ´ëÇÑ ÀÎÀå ½ÃÇèÀ» ÁøÇàÇÏ¿´´Ù. ¶ÇÇÑ, ³ëÁñ °æ·Î¿¡ µû¸¥ ºÎÀ§º° ÀÌ¹æ ¹°¼ºÀ» µµÃâÇϱâ À§ÇØ ½ÇÇèÀû µ¥ÀÌÅ͸¦ ±â¹ÝÀ¸·Î ¿ª°øÇÐ ±â¹ýÀ» Àû¿ëÇÏ¿´´Ù. Á¦¾ÈµÈ AM °øÁ¤ ¿¬°è ±¸Á¶ Çؼ® ¹æ¾ÈÀÇ Å¸´ç¼ºÀ» °ËÁõÇϱâ À§ÇØ ½ÇÇè °á°ú¿ÍÀÇ ºñ±³/ºÐ¼®À» º´ÇàÇÏ¿´À¸¸ç, ºÎÀ§º° ÀÌ¹æ ¹°¼ºÀÌ ¹Ý¿µµÈ FE ¸ðµ¨À» ¹ÙÅÁÀ¸·Î AM °øÁ¤ ¿¬°è ±¸Á¶ Çؼ®À» ¼öÇàÇÔÀ¸·Î½á º¹ÇÕ¼ÒÀç 3D ÇÁ¸°Æà Ãâ·Â¹°ÀÇ °Åµ¿ ¾ç»óÀ» Á¤È®ÇÏ°Ô ¿¹ÃøÇÒ ¼ö ÀÖÀ½À» È®ÀÎÇÏ¿´´Ù.
¿ä¾à2 In this paper, additive manufacturing (AM)-structural coupled analysis was proposed to accurately predict the mechanical behavior of 3D printed short-fiber reinforced composite structures. Tensile specimens were printed using a composite 3D printer (Mark Two, Markforged), and tensile tests were conducted on specimens manufactured with various nozzle paths. In addition, a reverse engineering scheme was applied to the experimental data to reasonably derive local anisotropic material properties according to the nozzle paths. Consequently, AM-structural coupled analysis was performed using the enhanced finite element model with mapped local materials properties, and the mechanical behavior of the 3D printed short-fiber reinforced composite was accurately described. To demonstrate the effectiveness of the proposed AM-structural coupled analysis model, the computational results obtained were compared with experimental results.
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DOI https://doi.org/10.7734/COSEIK.2024.37.5.309