Ceramic microlattice and epoxy interpenetrating phase composites with simultaneous high specific strength and specific energy absorption

被引：53

作者：

Li, Xinwei ^{[1
]}

Kim, Minseo ^{[1
]}

Zhai, Wei ^{[1
]}

机构：

[1] Natl Univ Singapore, Dept Mech Engn, Singapore 117575, Singapore

来源：

MATERIALS & DESIGN | 2022年 / 223卷

关键词：

Additive manufacturing; Microlattice; Truss; Interpenetrating phase composite; Finite element modelling; Energy absorption; MECHANICAL-PROPERTIES; ARCHITECTED MATERIALS;

D O I：

10.1016/j.matdes.2022.111206

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Being lightweight, strong, and tough, are qualities often sought-after in practical engineering materials. Herein, we present interpenetrating phase composites (IPC), based on the combination of additively man-ufactured alumina microlattices and infiltrated epoxy, that display an excellent combination of such characteristics. Experimental and simulation studies on the compressive behaviours of different truss-microlattices and their functionally-graded variants have been carried out. Lengthened stress plateau up to-0.6 strain and co-enhanced strength up to 65 % higher than the linear sum of their constituents have been observed. This constitutes a simultaneous high specific strength and specific energy absorption up to 113.5-142.6 MPa/(g/cm3) and 25.3-35.6 J/g, respectively, for the IPCs, at low densities of around 1.8 g/cm3. The mechanism of the co-enhanced strength attribute to the improved alumina fracture tough-ness whilst the lengthened plateau attributes to the progressive material failure and strain energy relax-ation. Overall, this work demonstrates the potential of using a strong ceramic and epoxy to achieve simultaneously high specific strength and energy absorption.(c) 2022 Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http:// creativecommons.org/licenses/by-nc-nd/4.0/).

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