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<p>This research introduces an innovative methodology to enhance the tensile strength of carbon fibre-reinforced polylactic acid (CF-PLA) composites, targeting applications in transtibial prosthetic sockets. The study systematically investigates the influence of process variables—raster angle, feed rate, and layer height—on tensile strength using fused filament fabrication technology. Tensile testing revealed that a layer height of 0.1&#xa0;mm, raster angle of 0°, and feed rate of 20&#xa0;mm/s produced the highest tensile strength of 27.567&#xa0;MPa, and a 71.01% improvement over specimens fabricated with suboptimal process variables. Statistical analyses utilizing Taguchi’s method and response surface methodology highlight that layer height significantly affects tensile strength, contributing to 56.61% of the observed variations. Fractographic analysis further elucidates the failure mechanisms, enabling the design and fabrication of low-cost, robust prosthetic sockets with enhanced user comfort and functionality. This study establishes a pathway for manufacturing durable and cost-effective prosthetic solutions, advancing the field of additive manufacturing in healthcare.</p>

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Enhancing performance and reliability: investigating failure morphology and statistical analysis of reinforced polylactic acid for application of transtibial prosthetic socket

  • 期刊论文

  • 发表日期：

    2025年3月24日

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  • Bobby Tyagi,
  • Abhishek Raj,
  • Gaurang Swarup Sharma,
  • Ankit Sahai

摘要

This research introduces an innovative methodology to enhance the tensile strength of carbon fibre-reinforced polylactic acid (CF-PLA) composites, targeting applications in transtibial prosthetic sockets. The study systematically investigates the influence of process variables—raster angle, feed rate, and layer height—on tensile strength using fused filament fabrication technology. Tensile testing revealed that a layer height of 0.1 mm, raster angle of 0°, and feed rate of 20 mm/s produced the highest tensile strength of 27.567 MPa, and a 71.01% improvement over specimens fabricated with suboptimal process variables. Statistical analyses utilizing Taguchi’s method and response surface methodology highlight that layer height significantly affects tensile strength, contributing to 56.61% of the observed variations. Fractographic analysis further elucidates the failure mechanisms, enabling the design and fabrication of low-cost, robust prosthetic sockets with enhanced user comfort and functionality. This study establishes a pathway for manufacturing durable and cost-effective prosthetic solutions, advancing the field of additive manufacturing in healthcare.