Open AccessCharaterizations of 3D printed re-entrant pattern/aramid knit composite prepared by various tilting angles
Author(s) -
Imjoo Jung,
Hyelim Kim,
Sun Hee Lee
Publication year - 2021
Publication title -
fashion and textiles
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.457
H-Index - 13
ISSN - 2198-0802
DOI - 10.1186/s40691-021-00273-6
Subject(s) - materials science , composite material , composite number , ultimate tensile strength , aramid , toughness , auxetics , bending , poisson's ratio , thermoplastic polyurethane , modulus , poisson distribution , elastomer , fiber , mathematics , statistics
This study intended to compare and analyze the Poisson's ratio and mechanical properties of aramid knit (ARNT), 3D printed auxetic re-entrant pattern (3DP-RE), and 2 types of composite fabrics manufactured with ARNT and 3DP-RE. Specimens were manufactured by 3D printing the re-entrant pattern with a CFDM (conveyor fused deposition modeling) 3D printer and TPU (thermoplastic polyurethane) filament, combining with aramid knit in 2 ways. Then, Poisson's ratio, bending, compression, and tensile properties were tested. As a result of Poisson's ratio, 3DP-RE and its 2 types of composite fabric showed negative Poisson's ratio at all angles and deformed stable at 0° and 90° than the bias direction. The bending strength confirmed that the composite fabric showed a lower value. But, the strain at max bending strength was greater than a substrate fabric. At the compression properties, it has been confirmed that compression strength and toughness are improved when manufacturing composite fabrics. As a result of tensile properties, 3DP-RE and composite fabrics were significantly more initial modulus, elongation and toughness than ARNT and were shown to be the largest in gradient 90°. Therefore, it is confirmed that the performance is excellent when fabricated as a 3DP-RE/ARNT composite fabric, and based on the results of studies, we intend to use it as the basic data for composite fabrics of auxetic structure suitable for shoe uppers.