MWCNT 在准静态加载下对 3D 打印仿生球顶立方核心的潜力。

Potentiality of MWCNT on 3D-printed bio-inspired spherical-roof cubic core under quasi-static loading.

机构信息

Structural Performance Materials Engineering (SUPERME) Focus Group, Faculty of Mechanical & Automotive Engineering Technology, Universiti Malaysia Pahang, 26600, Pekan, Pahang, Malaysia; School of Mechanical Engineering, Ningxia University, 750021, Yinchuan, China.

Faculty of Engineering, Universiti Teknologi Malaysia, Skudai, Johor, Malaysia.

出版信息

J Mech Behav Biomed Mater. 2022 Dec;136:105514. doi: 10.1016/j.jmbbm.2022.105514. Epub 2022 Oct 5.

DOI:10.1016/j.jmbbm.2022.105514

PMID:36215770

Abstract

Sandwich panel is increasingly used as lightweight energy absorbing components, which provides excellent crashworthiness performance with the three-dimensional periodic core. This paper investigates 3D-printed bio-inspired spherical-roof cubic cores with multi-walled carbon nanotubes (MWCNT) and foam-filled cores under quasi-static loading. The proposed bio-inspired spherical-roof cubic cores with 1.5 mm wall thickness were manufactured using the fused filament fabrication process, which used 70% polylactic acid (PLA) and 30% carbon fiber filament. Moreover, four groups of 3D-printed bio-inspired spherical-roof cubic cores were compared and analyzed on compressive properties and failure behavior. Experimental results were shown that foam-filled double bio-inspired spherical-roof cubic core with MWCNT was the maximum F with 1.92 kN, which provided a much more stable plateau load and better energy-absorbing characteristics. In addition, it is conducted that a double bio-inspired spherical-roof cubic core with four notches core is considered as the potential energy-absorbing core.

摘要

夹芯板作为一种轻质的吸能元件，其具有三维周期性芯材，可提供卓越的耐撞性。本文研究了在准静态载荷下具有多壁碳纳米管 (MWCNT) 和泡沫填充芯的 3D 打印仿生球形屋顶立方芯。所提出的具有 1.5mm 壁厚的仿生球形屋顶立方芯采用熔融灯丝制造工艺制造，使用 70%聚乳酸 (PLA) 和 30%碳纤维丝。此外，还对比分析了四组 3D 打印仿生球形屋顶立方芯的压缩性能和失效行为。实验结果表明，填充泡沫的双仿生球形屋顶立方芯加 MWCNT 的最大力 F 为 1.92kN，可提供更稳定的平台载荷和更好的吸能特性。此外，还认为带有四个缺口的双仿生球形屋顶立方芯是一种具有潜力的吸能芯。