Investigation of bending performance of printed continuous carbon fiber reinforced polylactic acid using acoustic emission

Abstract

In this study, rectangular beams were fabricated by 3D printed continuous carbon fiber reinforced polylactic acid. The effects of deposited space and layer thickness on bending performance are investigated, and the failure modes are analyzed accordingly. At the same time, the acoustic emission technology was applied to test the damage process to facilitate a more in-depth study compared with related studies, and the principal component analysis method and kmeans++ algorithm were applied to analyze the test signal. The results show that the bending strength and modulus of the printed composites decrease correspondingly with the increase of the layer thickness in the range of layer height of 0.7, 0.8, and 0.9 mm. When the fused deposited space is between 0.6 and 0.8 mm, with the increase of the deposited space, the bending strength and modulus also decrease correspondingly. By using principal component

Polymer composites–Special issue review for additive manufacturing of composites

“…4 Papers in this special issue range from the use of bio and bio-inspired materials, 2,3,5-12 materials and material systems that benefit from nanoscale enhancements, [13][14][15][16][17][18][19][20][21][22][23] advances in the medical field, [24][25][26] additive material systems utilizing thermosets, [27][28][29] large scale additive manufacturing, [30][31][32] and some rather novel applications in AM. 1,[33][34][35] Several articles focus on improvements for characterization, [36][37][38][39] and quite a few seek to identify parameters to enhance the final part performance through processing improvements. [40][41][42][43][44][45][46][47][48] The studies investigating the use of biological materials and bio-inspired systems begin with a thorough review by Tao et al 3 with a special focus on natural fibers.…”

“…Papers in this special issue range from the use of bio and bio‐inspired materials, 2,3,5–12 materials and material systems that benefit from nanoscale enhancements, 13–23 advances in the medical field, 24–26 additive material systems utilizing thermosets, 27–29 large scale additive manufacturing, 30–32 and some rather novel applications in AM 1,33–35 . Several articles focus on improvements for characterization, 36–39 and quite a few seek to identify parameters to enhance the final part performance through processing improvements 40–48 …”

Two‐scale elastic property prediction of 3D printed continuous carbon fiber reinforced thermoplastic composite based on micro‐computed tomography

“…Araya‐Calvo et al [ 21 ] characterized the compressive properties with specially designed experiments using statistical methods. Wu et al [ 22 ] investigated the bending performance and categorized the failure modes using machine learning. Chacon et al [ 23 ] and Dou et al [ 24 ] studied the mechanical behavior of samples printed using different process parameters.…”

Effect of printing path on compressive properties of 3D printed continuous fiber composite negative Poisson's ratio structure

“…3D printing technology has significant advantages over traditional manufacturing techniques because its unprecedented control of fiber placement and orientation. [37][38][39] Sugiyama et al 40 printed the continuous fiber reinforced composite sandwich structures with four types core shapes and investigated their bending properties. The results show that 3D printing technology has great application potential in the flexible design of core shapes that meet the required strength and stiffness.…”

“…3D printing technology has significant advantages over traditional manufacturing techniques because its unprecedented control of fiber placement and orientation 37–39 . Sugiyama et al 40 printed the continuous fiber reinforced composite sandwich structures with four types core shapes and investigated their bending properties.…”