摘要
为准确地对编织式复合材料编织带所构成的承力层进行仿真模拟,基于编织带的力学特点,建立了薄膜单元与混合单元2种具有不同承力性能的编织带壳单元接触模型,以模拟平面柔性编织带承力层的应力与变形,对比分析了在常规压力载荷作用下,有限元模型选择对承力层应力与变形的影响。结果表明,相互交错布置的编织带承力层,在局部均匀压力载荷作用下,因相互之间的接触而使编织带呈现特殊的力学特性;承力层有限元模型只考虑薄膜应力会过高估计编织带的承载能力,混合单元有限元模型可更真实地模拟编织带承力层结构的力学特性。
The accurate numerical simulation of mechanical behaviors in the woven fabrics structure is one of the key issues in its design,because the mechanical property of the woven fabrics is greatly different from the conventional continuum.Based on the mechanical behavior of the woven fabrics,the Finite Element Model (FEM) for different types of shell elements was set up to simulate the deformation and stress in the load bearing layer structure under local uniform pressure.The results showed that the model with only membrane element would result in over-evaluating of the load bearing ability of the woven fabrics structure.While the FEM based on hybrid element,in which the membrane element was combined with the convention shell element with a lower flexural rigidity,was more suitable to simulate the static mechanical response of the woven fabrics structure.
作者
刘敏
袭建人
房光强
刘钰
LIU Min;XI Jianren;FANG Guangqiang;LIU Yu(School of Civil Engineering,Shandong University,Jinan 250061,China;School of Material Science and Engineering,Shandong University,Jinan 250061,China;Shanghai Aerospace Engineering Research Institute,Shanghai 201108,China)
出处
《载人航天》
CSCD
北大核心
2019年第4期454-460,共7页
Manned Spaceflight
