摘要
通过试验和数值模拟对复合点阵结构在面内剪切载荷状态下的剪切性能和交互机制进行研究。试验分析了基体体心立方(BCC)结构的损伤失效历程和失效方式;以BCC单胞结构为基体,采用结构嵌合的方式探寻嵌合结构杆径对复合结构剪切强度和剪切模量的影响规律;最后通过面心立方(FCC)结构的试验验证了有限元分析的可靠性,探究了FCC-BCC结构在面内剪切载荷下的交互机制。试验结果表明,结构之间的嵌合增强了复合点阵结构的承载能力,同时结构的嵌合会影响复合结构的应变;当结构杆径尺寸均为0.45mm时,FCC-BCC和简单立方-体心立方(SC-BCC)的极限剪切强度相比于基体本身分别提高了159%和80%。
The shear behavior and interaction mechanism of composite lattice structures were studied under in-plane shear loads by tests and numerical simulations.The damage failure courses and failure modes of matrix body centered cube(BCC)structures were analyzed experimentally.Using BCC cell structure as matrix,the influences of the diameter of chimeric structures on shear strength and shear modulus of composite structures were investigated by means of chimeric structure.Finally,the reliability of finite element analysis was verified by face centered cubic(FCC)structure tests,and the interaction mechanism of FCC-BCC structures was explored under in-plane shear loads.The testing results show that the mosaicism amang structures enhances the bearing capacity of the composite lattice structures,and influences the strains of the composite structures.The ultimate shear strength of FCC-BCC and simple cube-body centered cube(SC-BCC)are as 159%and 80%higher than that of the matrix respectively when the diameter size of the structural rods are both 0.45 mm.
作者
牛国法
纪小刚
王炜
王广阳
NIU Guofa;JI Xiaogang;WANG Wei;WANG Guangyang(School of Mechanical Engineering,Jiangnan University,Wuxi,Jiangsu,214122;Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment Technology,Wuxi,Jiangsu,214122)
出处
《中国机械工程》
北大核心
2025年第5期1103-1110,共8页
China Mechanical Engineering
基金
国家自然科学基金(52175234,51105175)
江苏省“六大人才高峰”项目(JXQC-006)。
关键词
组织工程支架
点阵结构
柔弹性树脂
剪切模量
交互效应
tissue engineering scaffold
lattice structure
flexible elastic resin
shear modulus
interaction effect
作者简介
牛国法,男,1999年生,硕士研究生。研究方向为CAD/CAM、点阵结构等。发表论文2篇。E-mail:niu1999tt@163.com。;通信作者:纪小刚,男,1977年生,教授。研究方向为逆向工程、计算机辅助设计技术、柔弹性材料增材制造。发表论文50余篇。E-mail:bhearts@jiangnan.edu.cn。
