连续纤维Octet-truss点阵夹芯结构制造及抗压缩性能  

Fabrication and compression performance of continuous fiber Octet-truss lattice sandwich structure

作　　者：张甲瑞[1] 翟光涛 李文礼[2] ZHANG Jiarui;ZHAI Guangtao;LI Wenli(Institute of Intelligent Manufacturing and Automotive of CQTBI,Chongqing 401520,China;Key Laboratory of Advanced Manufacturing Technology for Automobile Parts,Ministry of Education,Chongqing University of Technology,Chongqing 400054,China)

机构地区：[1]重庆工商职业学院智能制造与汽车学院,重庆401520 [2]重庆理工大学汽车零部件先进制造技术教育部重点实验室,重庆400054

出　　处：《复合材料学报》2021年第6期1767-1774,共8页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金委青年项目(51805061);重庆市教委科学技术研究项目(KJQN201804007);重庆自然科学基金项目(cstc2020jcyjmsxmX0940)。

摘　　要：Octet-truss是一种兼具轻质构型和多功能特点的三维点阵结构,为分析和验证其抗压缩性能,提出了一种采用连续纤维制备Octet-truss点阵夹芯板的方法,该方法设计了一套Octet-truss结构成型工装,采用该工装,运用空间编织法及树脂固化工艺制备了不同类型的玻璃纤维和凯夫拉纤维试件,并对试件进行了轴压测试,实验结果表明该方法制备的不同材质、不同尺寸的夹芯板力学性能稳定,验证了其制备工艺的可靠性,结合实验过程与SEM图像分析了玻璃纤维试件主要失效模式为节点附近纤维杆因纤维微屈曲出现断裂,凯夫拉纤维试件主要失效模式为纤维杆欧拉屈曲而出现弯曲破坏。Octet-truss is a three-dimensional lattice structure with light configuration and multi-function characteristics. In order to analyze and verify its compression resistance, a method of preparing Octet-truss lattice sandwich panel with continuous fiber was proposed. A set of Octet-truss structure molding tools was designed by this method.Different types of glass fiber and Kevlar fiber specimens were prepared by spatial weaving method and resin curing process, and the axial compression test was carried out. The experimental results show that the mechanical properties of different materials and different sizes of sandwich panels prepared by this method are stable, and the reliability of the preparation process is verified, Combined with the experimental process and electron microscope images,the main failure mode of glass fiber samples is fracture of the struts near the nodes induced by fiber microbuckling,while the Kevlar fiber samples failed by the Euler buckling of the struts.

关 键 词：Octet-truss 点阵夹芯结构 制备工艺 成型工装 压缩性能 

分 类 号：TB332[一般工业技术—材料科学与工程] TB383.4