摘要
IsoTruss结构是一种一维的新型复合材料点阵结构,在轻质工程结构中受到关注。该文主要采用数值模拟方法,研究IsoTruss结构轴向压缩下的破坏模式。除材料失效破坏模式外,IsoTruss结构还主要存在两种屈曲破坏模式:局部屈曲破坏和整体屈曲破坏。研究表明,IsoTruss结构的屈曲破坏模式以及屈曲荷载与结构长度和螺旋筋的螺旋角变化相关,该文给出了三种破坏模式下的临界屈曲荷载理论值,并与数值模拟结果进行对比。
IsoTruss structure is a one-dimensional （1D） lattice truss composite structure, and it attracts attentions in lightweight engineering structures. The compression behaviors of IsoTruss columns in uniaxial compression were studied through finite element modelling （FEM）. Besides the material failure, there are two potential buckling failure modes： local buckling and global column buckling. It is revealed that the buckling mode and the critical buckling load change with the column length and the spiral angle of helical members. The research paper gives the critical buckling load theory of three failure modes in uniaxial compression, and compares their results of numerical simulation.
出处
《工程力学》
EI
CSCD
北大核心
2016年第B06期45-48,共4页
Engineering Mechanics
基金
国家自然科学基金项目(11172089
11372095)
关键词
IsoTruss结构
数值模拟
轴向压缩
屈曲破坏
屈曲荷载
IsoTruss structure
numerical simulations
uniaxial compression
buckling failure
buckling loading
