Scholarlink

<p>This research introduces a novel approach for tailoring material properties in parts fabricated using additive manufacturing (AM). Conventional extrusion-based AM printers have been modified to incorporate multiple material forms, enabling co-extrusion of rigid and flexible polymers within a single build. Rigid materials such as polylactic acid (PLA) provide high strength but limited elongation, whereas flexible polymers like Thermoplastic polyurethane (TPU) offer excellent elasticity but are difficult to process in filament-fed systems due to buckling and high melt viscosity. The developed system allows processing of these materials along with process parameters to be assigned according to specific tailoring requirements, producing printed parts with customized properties. Part quality assessments were carried out considering specific strength, average surface roughness, dimensional accuracy, and volumetric error. Case studies demonstrated the implementation procedure and validated the fabricated parts for different performance measures. Results revealed specific strength in the range of 13,330–30,740&#xa0;MPa·g/mm³, reduction in average surface roughness from 56.82&#xa0;μm to 45.59&#xa0;μm, and volumetric errors of − 10.60%, − 5.60%, and 2.34%. Moreover, co-extruded PLA + TPU specimens exhibited intermediate performance between the two base materials, achieving elongation up to 303% and Shore D hardness of 71. These findings confirm that the proposed co-extrusion system effectively enables property tailoring in AM, offering significant potential for applications requiring customized part quality improvement.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Tailoring flexibility and strength in 3D printed parts via multi-material co-extrusion technology

  • 期刊论文

  • 发表日期：

    2025年11月18日

查看全文
  • Krishnanand,
  • Mohammad Taufik

摘要

This research introduces a novel approach for tailoring material properties in parts fabricated using additive manufacturing (AM). Conventional extrusion-based AM printers have been modified to incorporate multiple material forms, enabling co-extrusion of rigid and flexible polymers within a single build. Rigid materials such as polylactic acid (PLA) provide high strength but limited elongation, whereas flexible polymers like Thermoplastic polyurethane (TPU) offer excellent elasticity but are difficult to process in filament-fed systems due to buckling and high melt viscosity. The developed system allows processing of these materials along with process parameters to be assigned according to specific tailoring requirements, producing printed parts with customized properties. Part quality assessments were carried out considering specific strength, average surface roughness, dimensional accuracy, and volumetric error. Case studies demonstrated the implementation procedure and validated the fabricated parts for different performance measures. Results revealed specific strength in the range of 13,330–30,740 MPa·g/mm³, reduction in average surface roughness from 56.82 μm to 45.59 μm, and volumetric errors of − 10.60%, − 5.60%, and 2.34%. Moreover, co-extruded PLA + TPU specimens exhibited intermediate performance between the two base materials, achieving elongation up to 303% and Shore D hardness of 71. These findings confirm that the proposed co-extrusion system effectively enables property tailoring in AM, offering significant potential for applications requiring customized part quality improvement.